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Low Rider CNC v4

The LowRider CNC v4 is the V1 Engineering version of a CNC router that can handle up to full sheet material, or down to a small bench top material removal monster!

!LR4 Fancy Picture

The Beta team put in months of effort helping to refine and improve all aspects of this design. Countless prints were made only to be scrutinized, revised, and remade. Debates were had, caps lock was used. It was not easy for any of us, but it was very fun for all of us. I am sure I can speak for the whole team when I say: we are proud of what we accomplished, and I am confident it will outperform your expectations.

Key Points

  • The average total build cost is easily under $800!!
  • Foams, wood, and plastic are easy, aluminum and other soft metals are no problem for an experienced user. A few users have even machined steel.
  • A lot of the parts are 3D printed. To save from shipping large parts, the machine can be partially assembled to cut them itself.
  • Easily removable from the table for storage.
  • Inexpensive hardware store conduit is the recommended rail. Rails ranging from 29.5mm (1” EMT) up to 32mm OD will work.
  • Many tool options, in terms of functionality and brands. Routers, laser, plasma, pens, etc. Blank DIY mount files are available to implement your own custom functionality.

  • Full Y axis squaring, Z axis leveling, and Z probing are standard for excellent precision and accuracy.

  • Works with any 5 driver board, though we have a purpose built Jackpot CNC Controller with excellent performance and usability.

  • Can be used with almost any firmware; Marlin, RepRap firmware, GRBL, FluidNC, GRBLHal, or others.

  • Want an idea of how long things take to build from actual users?

!LR4 Core Picture

Size and Shape

  • A typical build has a working volume of full sheet, ½ sheet, or quarter sheet. In the US that would be 8’x4’, 4’x4’, 4’x2’

  • A standard build would give you 50mm of Z cutting depth, or you can use a drop table to use all 100mm.

  • The CNC router can technically handle even larger sizes, but the smaller the build, the faster it can cut.

  • The single Y rail keeps the machine properly constrained while maintaining ease of use.

  • Two rails are extremely difficult to align. We made it so you don’t have to mess with that.

  • Width (X axis or “Beam”) should always be the shorter axis.

  • This CNC router is most rigid when working near the table surface, opposite of most conventional gantry CNC machines. So as your cut progresses (the lower you go), the machines rigidity increases.

!LR4 Render

Tool Options

This is a CNC platform, so just about any tool can easily be mounted to the LowRider CNC. The most typical is a router or spindle, Diode laser, pen, or even a drag knife. The Makita 700 series is available worldwide and highly recommended. Here is a link to the current tool mount collection on Printables

License

This is released with a Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International License.

More details to the loosened restrictions can be found here on the home page.

!LR4 Wide Picture

Parts Needed

Table

Your table needs only be as fancy as a sheet of wood on a relatively flat, smooth surface. A CNC machine can self correct many of its own imperfections if needed. Typically, our tables only support the CNC and some material, so nothing heavy duty is required. Stability is the main goal of your table.

Any existing table that is large enough is fine. You can use its surface directly, or a more popular option is to add a waste board of some sort on top that is replaceable as it gets used and cut into.

Next option would be to build a basic table with any material that is easy to source for you. Accuracy is not super important, but the more square and flat you make it, the better. A simple 2x4 table with an MDF/plywood/OSB table top is most common.

If you have a table saw, circular saw with a guide, or a CNC machine, a Torsion Box table is pretty easy to make and can lead to a very stable surface that will last a long time.

  • ~$200 basic parametric plans, from V1E.com LR4 easy table.
  • Here is a basic parametric set of plans that are easily configurable, from Jonathan Jones V1 LR Table

Calculator for table, rail, and belt lengths

!LR4 overhead Picture

Rails

You are looking for either 29.5mm, 30mm, or 32mm Outside Dimension (OD) steel tubes. In the U.S. and parts of Canada this will be 1” EMT Conduit (29.5mm), off the shelf hardware store conduit (not “rigid” conduit). In other countries you will either be 30mm or 32mm OD.

If you want to find a different material for rails, look for:

  • OD +-0.2mm of 29.5mm, 30mm, or 32mm.
  • At least 1.3mm thick wall.
  • Steel, Stainless Steel, DOM Steel (aluminum and carbon fiber will not work).
  • Super thick walls, solid rods, and filled tubes will gain little to no rigidity and just add mass and cost.

If your country does not use metal conduit, things to look for are: metal supply companies, closet rods, or boat suppliers tend to have stainless tubes.

Printed Parts

DIY or Buy?

Buy

Rather not spend the time printing all the parts? You can buy a set here, V1 Shop

If you are in Germany or the EU, you can buy a set from HaWiWe

DIY

Printed parts files can be found at the links below

Printables.com

Thingiverse

Maker World

  • Do not use supports, keep the default orientation.
  • You will need about 2.7kg of filament for a full set with tool mount and a board box.
  • PLA is recommended for ultimate rigidity. Other filaments with great rigidity and added heat resistance are PET-GF/CF and PC-GF/CF.
  • 3 walls rectilinear or cubic infill for most parts. Thicker layers, since these are large parts, no more than 80% nozzle diameter to layer thickness ratio to keep steep walls working. For newbies: the printer files downloaded from the links above should have these settings by default, but its best to verify.
  • 200mmx200mmx190mm available build volume is needed to print these parts.

Info

Printer Skew calibration is suggested, we are trying to make sure parts are true vertical (90 degrees) and not tilted, this can be done easily with a carpenters square and a tall printed part. Or Vector3D, makes a wonderful tool. Skew calibration is enough size calibration should not be needed. You can also print the two small parts, Z_Stub and Z_Nut to make sure they fit together easily and you can get the m5 nuts inserts before printing the larger parts.

QTY File Name Infill Comment Link
1 Core 30%
1 YZ_Plate_Min 25%
1 YZ_Plate_Max 25%
1 FrontWheel_Min 20%
1 FrontWheel_Max 20%
1 BackWheel_Min 20%
1 BackWheel_Max 20%
1 Y_Belt_MinF 30%
1 Y_Belt_MinB 30%
1 Y_Belt_MaxF 30%
1 Y_Belt_MaxB 30%
1 Y_Belt_Max_Lock 30%
1 Y_Belt_Min_Tension 30%
1 Y_Belt_Min_Lock 30%
1 Y_Belt_Max_Tension 30%
1 ZStop_Min 30%
1 ZStop_Max 30%
2 Z_Nut 30%
1 Z_Stub_Min 30%
1 Z_Stub_Max 30%
1 X_Belt 30%
4-6 Brace_### 30% * See Brace note below
1 Brace_Max_### 60% * See Brace note below
4-6 Hose_Hook_## 30% Print one for each Brace
7-10 Y_Clip_### 30% No more than 300mm center to center
4 Temp Strut 15%
Tool Mount Set
1 Makita, DeWalt, Kobalt 30% Print info in the part description Makita | DeWalt | Kobalt
1 Board Box 20% Jackpot | SKR Pro
  • Wire sleeve is nice but not needed Shop, Amazon.

  • ”###” = various Sizes

  • Brace note- Print Brace_Max_### and one Brace_### at 60% infill. These will be the end braces and benefit from added rigidity.

  • If a part name if followed by a version number use the highest one. V1, V2, V3… Means there was a fix or edit, a bigger number means newer part.

Warning

Repetier, Slic3r, Prusa Slicer, Orca, Bambu, all seem to slice normally. Cura based slicers seem to work a little different. Make sure the parts are aligned on your bed as they appear in the Printables thumbnails. Bridging also seems to be a bit of an issue for some of the internal overhangs. It is best to check the “Dust Skirt” and “YZ_Plate” internal features after slicing to be certain the bridges are bridging the short way, not the long way. Repetier\PrusaSlicer based slicers have been tested to work as expected.

!LR4 JJ's Picture

Flat Parts

Strut Plates

Strut plates give the X axis beam it’s rigidity. You are meant to assemble the machine using the printed temporary strut plates, and then use the machine to cut its own permanent strut plates.

  • You will need a rigid material 6.35mm (¼“) or thinner for your plates.
  • Common options include: MDF, hardboard, plastic, metal is a premium option and is not necessary.

Vector76 Strut Generator Jamie made this easy to use site so you can have any size plates you can dream of. The strut length comes from the calculator, but it will cut slightly smaller (0.5mm) by design.

  • strut_length = value from the calculator
  • num_braces = leave at default
  • size of dogbone... = leave at 3.5 for a ⅛” (3mm) endmill
  • Check both front_plate and bottom_plate
  • front_wing_size = 11.5 for 29.5 mm (1” EMT conduit), or your conduit size if different.
  • Click Render (Ctrl+Enter) to create your strut plates
  • Click the link to download strut_plate.svg. More on what to do with this later!
  • His site has all sorts of other helpful things linked on other Docs pages.

!LR4 strut plate Picture

Extra Info:

The Wings are referring to the parts that make the plate nearly touch the rails to fill in the gaps.

A full sheet build normally has 7 braces.


XZ Plates

XZ Plates connect your X axis beam to your YZ plates.

The easiest option for most people, are the metal XZ plates from the V1E.com shop.

Other options:

You can cut your own metal plates with the DXF files found with the printed parts files linked above. Aluminum or steel ¼” (6.35mm) thick material is suggested to work well with the hardware as is. If you want to use thicker or thinner material you will need to adjust the 16 M3x10mm screw length to compensate.

There is a file for printable XZ plates by member Aza, the idea being that you would only use them temporarily to cut metal plates. This is only recommended if you have experience with Aluminum cutting on a V1 CNC.

Specialty Parts

You can buy most of the specialty parts and hardware here, V1 Shop

QTY Description Comment Link
1 Control Board 5 driver minimum, Jackpot suggested Shop – Elecrow
5 Steppers, Nema17 20mm+ shaft length Shop – Amazon
3 stepper wire extenders Shop – Amazon
3 Pulleys 16T 10mm 10mm GT2 16 Tooth Shop – Amazon
6 Idlers Smooth 20T 20T Smooth 5mm Bore Shop – Amazon
8M Belt GT2 10mm See Calculator, no steel belt Shop – Amazon
5 Endstops Shop – Amazon
14 608-2RS Bearings Shop – Amazon
2 T8 Leadscrew & nut 145mm or larger, 4 start 2mm pitch, 8mm/Rev Shop – Amazon
2 Coupler 8mm to 5mm Shop – Amazon
4 Linear rails MGN MGN12H 150mm Shop – Amazon
1 Power Supply 9-24V Board dependent 36W+ Shop – Amazon
* Thread locker Optional for grubs screws Shop – Amazon
* Lube Optional for idlers and linear rails Shop – Amazon
* Vac Hose Optional 2.5” (70mm) OD Vacuum hose steel rib – Amazon

As an Amazon Associate, I earn from qualifying purchases.

  • Vac Hoses need to be grounded at one end. Using a steel ribbed hose makes this very easy to use the ground port from your power source. If you use a non-conductive vac hose you can run a bare wire through the hose secure at one end and ground at the other. If you do not ground your hose static will build up and can damage your control board or other components.

Hardware

This is what is needed for a 4’ x 8’ (1.2m x 2.4m) build. You will need more or less depending on what size you build. M8 or 5/16 should be hex head bolts.

QTY Description US Equivalent
14 M8 x 40mm Hex Head 5/16” x 1.5” Hex Head
14 M8 Nylock nuts 5/16” Nylock
60 M5 x 30mm Machine Screws, Button Head Must be metric
60 M5 Nylock Must be metric
83 M3 x 10mm Machine Screws, Button Head Must be metric
10 M2.5 x 12mm Machine Screws, Button Head Must be metric
*18 M4 x 12mm+ Wood/metal #8 x ½“+ Screws to mount things to your table

* Not included in the hardware kit. You might also want different lengths to accommodate different material thickness.

Update and conversion info

Click here for required hardware for converting older LowRiders or your MPCNC to an LR4

LR3 to LR4 hardware differences for updating your build

Lr3 to Lr4 Upgrade kit is available here in the V1E.com shop.

QTY Description Notes
39 M3 x 10mm
2 145mm+ Leadscrews
set XZ Plates
~8m 10mm belt Use the calc for accurate length for your build

LR2 to LR4 hardware differences for updating your build

QTY Description Notes
14 5/16x1.5” (8mm bolts)
14 5/16 (8mm) nuts
54 M5x30mm screws
54 M5 nut
10 M2.5x12mm
59 M3 x 10mm
5 endstops
4 linear rails
set XZ Plates
~8m 10mm belt Use the calc for accurate length for your build
  • 5 driver control board is recommended
  • Updating to a 24v Power supply is also recommended if you only have a 12V.

MPCNC Primo to LR4 hardware differences for converting your build

QTY Description Notes
61 M3 x 10mm
2 M2.5 x 12mm
1 Endstop
1 145mm+ Lead screws You can use the one you have and add one
1 Coupler 8mm to 5mm
4 Linear rails MGN MGN12H 150mm
set XZ Plates
~8m 10mm belt Use the calc for accurate length for your build
  • 5 driver control board is recommended
  • Updating to a 24v Power supply is also recommended if you only have a 12V.

Assembling the Lowrider 4 CNC machine:

Ready to start your build? Relax, have fun, if you have issues just stop and ask in the forums. Taking a step back and asking a couple questions can save a ton of headaches. Hand tools only, power tools just get you into trouble here.

!LR4 Core assm

Step one will be building the Core.

Core Assembly

Here is a users build video showing this process.

!LR4 Core assm

  • Bearings should drop into the pockets
  • Bolts get inserted in the direction shown
  • Snug these two up just enough to seat the bolt heads, no need to crush anything, these are just bearing axles.

!LR4 Core assm

  • Same thing again
  • Bearings should drop into the pockets
  • Bolts get inserted in the direction shown
  • Snug these two up just enough to seat the bolt heads, no need to crush anything, these are just bearing axles.

!LR4 Core assm

  • Third time
  • Bearings should drop into the pockets
  • Bolts get inserted in the direction shown
  • Snug these two up just enough to seat the bolt heads, no need to crush anything, these are just bearing axles.

!LR4 Core assm

  • Okay this time it’s different
  • Insert the bolts in the direction shown.
  • This time do not snug these down!!
  • These two bolts control the tension of the Core on the X rails.
  • Leave these loose we will slowly tighten these when the machine is fully assembled.

!LR4 Core assm

  • This step is using a piece of filament to lock in the tool holder nuts

!LR4 Core assm

  • Insert the M5 nuts with the nylock side facing the back, (the side shown in this picture).
  • For each side I prefer to cut the filament with a little angle to make it easier to feed into the lower hole.
  • Slide the filament in making sure it seats all the way to the bottom of the second hole.
  • Snip the top off flush with the core surface to avoid snags.

!LR4 Core assm

  • On this side the angle it the other way

!LR4 Core assm

  • Repeat for all 4 screws
  • Make sure they are all snipped flush.

!LR4 Core assm

  • Now is a good time to add your tool mount.
  • This lets you make sure your nuts get seated well and nothing pushes out or gets cross threaded

!LR4 Core assm

  • Snug these up real good, but don’t break anything.
  • Not sure if it matters for tool tramming but I always get all 4 screws close then fully tighten the left screws first on both top and bottom mounts
  • If you do need to tram your tool later usually a couple layers of tape as a shim under these mounts will do the trick

!LR4 Core assm

  • Optional Touch plate
  • This can be added later or just ran behind the router, it does not have to use this hole.

!LR4 Core assm

  • Leave at least 140mm (5.5”) of free touch plate wire
  • Run the rest through the hole.

!LR4 Core assm

  • Run that wire through the tunnel in the core

!LR4 Core assm

  • From here you will want to run the X end stop wire as well.
  • Some find it easier to run the thicker touchplate wire through first, some say the thinner wire first is easier.
  • Take your time give it a little jiggle, they should slide right through
  • Worst case you need to guide the black plug through the opening at the front side of the core.
  • After you get the wires through to the front, you should label them.

!LR4 Core assm

  • For these small end stop wires I like to actually fold the wire back and crimp them on this way.
  • This is not “proper” form but for such small gauge wire it works very well.
  • Testing these crimps for continuity is a good idea.

!LR4 Core assm

  • Plug in the X endstop
  • This uses the M2.5mm screws.

!LR4 Core assm

  • Lever opens to the bottom
  • Seat these tiny screws all the way but be very careful not to strip them out.

!LR4 Core assm

  • Using the belt guide on the back of the core set the pulley on the X stepper shaft.
  • Always tighten the set / grub screw on the shaft flat first, then the second screw.

!LR4 Core assm

  • M3 screws will be used to attach the stepper
  • If you insert the X belt now it saves a bit of work later
  • Run all the wires together up from behind the stepper
  • The wires should not be constricted

!LR4 Core assm

  • Secure the wires up at the top of the core
  • The next step is using the idlers and M5 hardware

!LR4 Core assm

  • Insert the M5 nuts
  • I can usually press them in with a flat headed screwdriver or needle nosed pliers.

!LR4 Core assm

  • Add the idlers, and screws
  • Using the holes in the top of the core drive the screws
  • These just need to hit the Nylock, they do not need to be snug
  • The idlers should be extremely free to rotate

!LR4 Core assm

  • That’s it, the core is ready for final assembly!
  • Easy right?!

YZ Plate Assemblies

Wonderful video showing the process here.

Start the YZ plates.

!LR4 yz assm

  • This is what the finished assembly will look like.

!LR4 yz assm

  • Start by doing yourself a favor by labeling all the wires before you run them.
  • As small and as tight to the wire as you can get makes things the easiest.
  • Label the wires and not the plugs so they still fit in the control board and you can read them without unplugging.
  • Typically, as you face the machine, the left side is Y0 and Z0, and the right side is Y1 and Z1.

!LR4 yz assm

  • Use the M2.5 screws to secure the crimped or soldered endstop to the Z_Stop_Min/Max part

!LR4 yz assm

  • Notice what way the lever faces, away from the flat side.

!LR4 yz assm

  • The nut gets pressed in from the YZ plate face.
  • If your nut is not tight you can use a flat head screw driver to hold it in place while tightening in a few steps.

!LR4 yz assm

  • Run the wire through the channel

!LR4 yz assm

  • Lightly secure the Z stop part with an M5 Screw and nut.
  • Start with the assembly in the low position, this will get adjusted later.

!LR4 yz assm

  • Run the endstop wire all the way out of the bottom of the YZ plate.

!LR4 yz assm

  • Insert both M5 idler nuts into place

!LR4 yz assm

  • Add the M5 Screws to hold the nuts into place until later.
  • If you have a hard time with the nuts moving a flat head screw driver can help push them into place.

!LR4 yz assm

  • Use the alignment gauge on the top of the YZ plate to align the pulley.
  • Secure the pulley with the set/grub screw on the flat face first, then the other screw.
  • The little black fasteners are set screws or grub screws.
  • Notice the stepper is on the chamfered / endstop side.

!LR4 yz assm

  • make sure to label the wire, Y0 or Y1.
  • Feed the wire through the channel, make sure you are on the larger side of the hole.

!LR4 yz assm

  • Use two M3 screws to hold the stepper in place lightly, the other two screws come later.

!LR4 yz assm

  • Build the front wheel, both are similar. The heads face outside the machine or down.
  • Snug up the large bolts do not crush the part.

!LR4 yz assm

  • Two M3 screws will secure the front wheel and the rest of the Y stepper.

!LR4 yz assm

  • Snug up all 4 stepper screws.
  • Make sure the outer faces of the YZ plate and Wheel are flush with each other. You can lay the parts on a flat table with the wheels hanging off the edge to align them before snugging it up.

!LR4 yz assm

  • Load your Y axis belt around the pulley, tweezers or a small screwdriver can help guide it.
  • Cut it to length according to the calculator
  • You can remove the M5 screws to make this easier

!LR4 yz assm

  • Add the idlers and M5 screws back into place.
  • Seat the screws, but do not crush the plastic or the idler bearings.
  • A drop of light oil or lube from the hardware kit inside these bearings can help to extend the life of them.

!LR4 yz assm

  • Wire labeled as Y0 or Y1
  • Run the wires through the first channel.

!LR4 yz assm

  • Use the M2.5 screws to secure the endstop with the arm facing out.
  • 99% of builds are going to use this endstop, homing to Ymin. The locations for the endstops located at the back are only for those who want to home to Ymax (not recommended for beginners, needs changes to the config).

Warning

From this point on, be cautious not to snag the little lever on anything. You can hang the wheels and lever off the edge of the table if needed.


!LR4 yz assm

  • Run one wire at a time through the keeper, this makes it very easy.
  • Run the small wires through the wire keeper first
  • Then run the stepper wires to hold them all in.
  • If you are having a hard time do not pry the tab, simply push the wires in with your pulley allen key or a flat head screwdriver.

!LR4 yz assm

  • All the wires should be to the back of the plate.
  • Feed them one at a time out of the slot in the slot in the back.
  • Some people are finding it easier to run the Z stepper wire first.

!LR4 yz assm

  • When you get all the wires through, it is best to bundle them.

!LR4 yz assm

  • Use the guide on the top of the YZ plate to align the coupler.
  • Use the small furthest line
  • Make sure the stepper is on the endstop side of the plate.
  • Tighten the set/grub screw on the flat first, the other.

!LR4 yz assm

  • Run the wire out the back channel.
  • Notice what side of the hole this goes in from.
  • You might need to jiggle the other wires to let it feed through.
  • Bundle for safety.
  • Some find it easier to do this wire first then the rest.

!LR4 yz assm

  • M3 screws to secure the stepper, start all 4 first, then final snug.

!LR4 yz assm

  • Use the sharp edge of the Linear rail to chisel the rail bed smooth.
  • Any print artifacts, blobs, or rough spots, should just come right off.
  • This simple step makes both rails sit on the printed parts better preventing twists of any kind.

!LR4 yz assm

  • Notice the Y endstop hanging off the table as to not bother the small lever.
  • Loosely add all the M3 screws to the linear rails, get the heads just under the rail surface.
  • Keep an eye out for off center M3 screw heads, they can be sneaky and make this next step harder.

!LR4 yz assm

  • Add XZ plate using M3 screws to the bearing blocks. Snug.
  • XZ max has the large hole.
  • XZ Min has the slot at the top, the one that is shown in this picture.

!LR4 yz assm

  • Snug all the rail screws
  • Move the XZ plate the full range of motion for each screw to assure there is no binding and everything stays smooth.
  • After the rails are tight, it is a good idea to loosen up the each bearing block and snug it back up.
  • That little step always seems to gain a little more smooth action.

!LR4 yz assm

  • Add the T8 Leadscrew to the coupler. Make sure the leadscrew is fully seated and touching the stepper shaft.
  • Snug both grub screws.

!LR4 yz assm

  • Add the brass nut to the Z_Nut
  • 1-2 M3 screws is all that is needed.
  • This can be a snug fit, use pliers to press fit if needed.
  • Thread this on to the leadscrew brass face down

!LR4 yz assm

  • The Z stubs get 2 hidden nuts and are secured to the XZ plates with M5 screws.

!LR4 yz assm

  • The hidden M5 nuts get pressed in and fully seated.

!LR4 yz assm

  • If you have trouble seating the nuts, you can;
  • Press them in with a flat head as shown here (loose print)
  • Or you can thread the M5 through the XZ plate and use it to pull them into place (tight print).

!LR4 yz assm

  • Snug in the Z stubs using the two M5 screws.
  • Leave out the cross tensioner screws for now.
  • Make sure the Z_nut is already in place.

!LR4 yz assm

  • Assemble the back wheel.
  • Bolt heads facing out or down.
  • Snug up the bolts.

!LR4 yz assm

  • Be sure to pre-thread the nut on to the screw to loosen up the lock nut before assembly. More than once can help as well.
  • Slow and easy on the next step. Make sure not to cross thread the nut is it gets moved and ends up crooked.

!LR4 yz assm

  • Again, be sure to pre-thread the nut on to the screw to loosen up the lock nut before assembly. More than once can help as well.
  • Insert the “hidden” M5 Nut. This picture shows how to make sure it is aligned if you want to add a drop of glue to hold the nut.
  • Snug up the wheel assembly with the M5, if there is any resistance make certain it is not cross threaded.
  • Make sure the outer faces of both parts are flush.
  • Sloppy wheel alignment can lead to the whole beam not being very square to the table If your finished build is sitting crooked this is one place to check.

!LR4 yz assm

  • Make sure the outer faces of both parts are flush.
  • Sloppy wheel alignment can lead to the whole beam not being very square to the table If your finished build is sitting crooked this is one place to check.

!LR4 yz assm

  • Take the time to set your Z endstops.
  • You want them to trigger just before the bearing blocks hit the top stop block. On both sides.
  • You can measure the trigger position from a fixed point to get them really close, this can make Z leveling a bit faster later on.

!LR4 yz assm

  • How did you do, wanna yell at me or did you have fun?
  • Now is a great time to take a photo and share it.
  • You are building a robot that will hold a power tool, everyone needs to hear about that.

Beam Assembly

!LR4 Beam assm

  • Gather your Beam parts.
  • If you bought the V1 printed parts set you will notice the two end Braces have a different surface pattern.
  • If you printed your own, make sure to use the heavy infill on the ends.

!LR4 Beam assm

  • Install and fully seat the X belt tensioner nut

!LR4 Beam assm

  • If you need to you can use the screw to fully seat it.
  • Take the screw back out.

!LR4 Beam assm

  • Position the end braces to fit the temp struts, equally space your remaining braces and snap in the rails.
  • Make sure the rails do not stick out past your braces. Double check with your calculator values for total brace width.
  • If you just finished cutting your own strut plate, you have already done this, you don’t need my help.

!LR4 Beam assm

  • Install the temp strut plates, orientation is shown in teh following two steps.
  • Do not crush the front rail clamps.
  • As you tighten the screws you will feel the clamps start to engage, that is all you need.
  • Tubes will still be able to rotate, if you try hard enough you can pull them out.
  • Trust me, just a tiny bit of tension is all you need.
  • The rails carry no sideways loads, do not overtightened them, it only causes issues.

!LR4 Beam assm

  • Notice the orientation, there is a screw head cutout.

!LR4 Beam assm

  • Only one way this side fits

!LR4 Beam assm

  • Install the bottom temp struts as well.
  • Pay attention to the small hole location.

Main Assembly

!LR4 main assm

  • Screw together the YZ max assembly to the beam.
  • These 3 screws get snugged down.
  • It tends to be easier to hold them with the screwdriver and use a wrench to tighten the nuts.
  • Snug....don’t crush. It is very easy to leave them a bit light and check them again later.

!LR4 main assm

  • Looking good right, like you almost have a machine!

!LR4 main assm

  • Slide on the core, be sure not to snag any wires.
  • Now is a good time to check the tension the top two core tension bolts.
  • Start with the bolts loose, sometimes you do not need to tension them until after some use.
  • You want these bolts seated and the core not to rattle when you wiggle it. Tiny adjustments if needed.
  • If you are too tight you will actually start to feel the core get tighter and looser as you cross over the braces.
  • Loose here is better than too tight. It is simple to add tension later, difficult to replace a broken core.

!LR4 main assm

  • Now you can add the YZ min assembly

!LR4 main assm

  • Easy section, admire your work.

!LR4 main assm

  • Double check that the lower X rail is not touching either metal XZ plate.
  • If it touches your machine will most likely have driving or lifting issues.

!LR4 main assm

  • You can do a quick check with a square to see how your sides are angled.
  • If you don’t have a square this will get checked in the next section in another way.

!LR4 main assm

  • Okay now is a good time to make sure your heal toe measurements are equal.
  • Roughly set the beam level by turning the Z axis leadscrews, one side is different so the side plates will be at different heights.
  • Simply measure across the front of your machine from the side plates (not the wheels as those can move).

!LR4 main assm

  • Now measure across the back
  • The two numbers should be nearly identical.
  • If they are not the machine can wander when not under power.
  • The adjustment would be to check your end braces and if needed you can loosen your temp struts and straighten the sides out.

Wire routing

!LR4 Wire Routing

  • Find a good home for your control board. The YZ_Min side as shown here is recommended.
  • The first bay makes wiring the easiest, as well as SD card access.

!LR4 Wire Routing

  • Run your wires from the YZ assemblies to the beam with the beam at full height.
  • Feed the wires from the YZ assembly into the beam and secure them to the brace.
  • Make sure the travel is free, clear, and smooth. The wires should have slack at all positions, test this by moving the beam up and down.
  • Cable ties, wire ties, or tape to the braces work well to hold the wires in place.
  • Wire cover is nice but not needed Shop, Amazon.

!LR4 Wire Routing

  • Extensions are used from the YZ_Max side as well as from the Core, to reach the control board.
  • The extension connections need to be secured to remove any strain.
  • Fold the wires, leaving the connection straight, and get ready for tape.

!LR4 Wire Routing

  • Taping them like this takes all the strain off the connectors.
  • It is best to label this connection as well as the end of the extension.
  • Repeat for Y1 and Z1 Stepper and endstops, as well as The Core’s X and X endstop.

!LR4 Wire Routing

  • This is an easy way to deal with the extra wire.
  • Run it all the way to the control board and plug it in.
  • Secure all wires at each brace. Shown at the top of the braces here, but the bottoms work just as well.
  • Pull all the slack to the furthest section as shown.

!LR4 Wire Routing

  • Fold each wire up on itself secure and make a nice bundle.

!LR4 Wire Routing

  • Extensions secured into place.
  • Wires connected to the control board.
  • You can run the wires along the top as show, helps with dust management, or along the bottom.

!LR4 Wire Routing

  • Info on running the Core wires.
  • You have several options here, for most builds bundling the wires with your Router power cord is the easiest.
  • If you do not plan to use a vac hose, or are not using a router you will need some sort of wire loom or cover to give it more rigidity.Shop, Amazon. The “tape measure trick” will also work here.
  • Other options are split loom, split sleeve (show later), wire tape, or spiral wrap.

!LR4 Wire Routing

  • Move the core all the way to X_Max, the YZ_Max plate.
  • Secure your wires to the first position at the top of the Core.
  • Add in the Hose_Hooks to hold the wires. (new hose hooks, the longer ones go where the hose moves, short ones ho on eth middle and end brace)
  • The wires and hose get secured to your middle brace, the number of hose hooks vary depending on build size.
  • Leave a small loop in the wires at the max position.
  • You will be securing it the the brace just past halfway.
  • If you are using a router set it in the tool mount and run the power cord along with the wires. Leave a little cord room for router adjustment in the tool mount.
  • Later when the vac hose gets added the wires get secured to it.

!LR4 Wire Routing

  • The Core wires get ran to the half way point and then into the braces with the other wires.
  • They wires get plugged in and then bundled neatly.
  • Carefully make sure the Core reaches both ends without pulling on the wires.
  • You can add a little partial twist in the wire bundle to make them behave properly when the core moves.

!LR4 Wire Routing

  • When adding in your vacuum hose connect it to your dust shoe, and up to the second mounting hole in the top of the Core.
  • The hose gets secured to your middle brace and the Hose Hook. If needed add a partial twist so your hose tracks properly to both extremes and does not fall over the front or the back of the CNC.
  • The picture shows an easy way to route the wires and hose together. The wires cross under the hose after the middle brace.
  • Secure the wires to the hose just after each hose hook. You can secure them either just above the hose hook or in the corner. Both are shown in this picture.
  • It is best to pass the wires under the hose at the middle position, not over as it can snag.
  • The hose and wires are secured to the middle hose hook part, cable ties or tape will work.

!LR4 Wire Routing

  • Test the wire and hose routing at both extremes.
  • This is much easier before the X belt is added.
  • Take your time and get this tracking well.

!LR4 Wire Routing

  • Run the YZ Min assembly wires.
  • The slack can get bundled on either side of the board box.
  • Leave the board box as open and uncluttered as possible for easy air flow.

!LR4 Wire Routing

  • Leave the board box as open for air flow as possible.

!LR4 Wire Routing

  • After the strut plates are cut the power supply will get mounted here.
  • Size your wires to give you some room to work. Connect to your control board and run the power cable.

!LR4 Wire Routing

  • For now just flip the power supply to hold it in place on your hose hooks.
  • When the strut plates are done This will get more permanently mounted.

!LR4 Wire Routing

  • Bonus tip!
  • You can either run your power supply and Router cords out with the vacuum hose, or you can run a single extension cord into the beam.
  • An extension cable makes Y motion cable management easier later, and if makes it easy to add an SSR for automated router control (advanced).

!LR4 Wire Routing

  • All wired up and ready to move on!!!

Belts

!LR4 Belts

  • First step to mounting the CNC to the table is setting the Y rail
  • Do your best to make a perfectly rectangular table, but once the rail is set that becomes your reference, so do your best to make your rail parallel to your table edge.
  • The belt holders and Y_Clips all share the outer edge, using the same reference.
  • The calculator “table measurement” gives you the exact outside dimensions of the belt holders as the footprint.
  • No more than 300mm gap is recommended between Y_Clips.

!LR4 Belts

  • Pre-drilling is highly recommended so your parts lay flat on the table when screwed down.
  • You can draw a screw hole centerline down the table to make this easy.
  • There is +-1.5mm so each clip has a little wiggle room if your holes are not perfect.
  • Best to set both Y Max belt ends and the first and last Y clips on the table first.
  • Then measure the remaining gap and equally divide the rest of your clips.

!LR4 Belts

  • Make sure both Y Min belt holders get an M3 screw fully inserted
  • This is for coarse Y squaring adjustment screw

!LR4 Belts

  • Trick for marking the holes is an over sharpened pencil

!LR4 Belts

  • Both ends get set and pre-drilled.

!LR4 Belts

  • The first clip get attached directly next to the belt holders on both ends.

!LR4 Belts

  • Put the clips on your rail
  • Snug each clip to the table one at a time.
  • Use the table edge or any straight surface you might have (a level work well as a straight edge)

!LR4 Belts

  • Loop the belt around an M3 screw

!LR4 Belts

  • Pull the belt to set the screw and lock the belt
  • Notice the end of the belt does come through and has a couple extra teeth showing
  • This is the same for all the belts

!LR4 Belts

  • Set the Y Min into place
  • This is a quick release for removing from the table

!LR4 Belts

  • Prepare the Y_Max belt tensioner.

!LR4 Belts

  • Sink the nut and insert the screw

!LR4 Belts

  • Secure the belt with an M3 just as before
  • This ends sets the initial tension so it can take a few tries to get the distance right
  • Make sure the belt is on the pulley and in both idlers correctly.

!LR4 Belts

  • You want the tension to hold the belt taut, but not crazy
  • You want 7lbs (3.2kg) tension, it is not as much as you think.
  • It will NOT pluck like a guitar.
  • Always best to start loose, if all your parts come out several millimeters small, then you might be too loose
  • If you overtightened you can prevent the steppers from turning, you will certainly break parts.
  • The parts will break long before the belt does.

!LR4 Belts

  • Setting the Y min distance can be done from the calculator, or
  • Using a piece of belt on the table to set a one belt gap width.
  • Mark and pre-drill all your holes.
  • I used a pencil sharpened by hand to get into the deep holes

!LR4 Belts

  • Set the Y stop screw so the endstop triggers just before the LowRider hits the end
  • If the endstop gets past the screw there is a good chance you will pop or bend the endstop lever.
  • Take your time here. I get a trigger and about 4mm more travel.

!LR4 Belts

  • Finish this belt just like the max side
  • M3’s to secure, correct tension
  • Y axis squaring gets set later.

!LR4 Belts

  • If you are using a vacuum hose, it is best to set it before attaching the X belt.
  • Plug in the tool end
  • Route the hose up and cable tie / secure it to the top of the core

!LR4 Belts

  • Arrange the hose and wires starting at X max
  • Best to leave a slight curve even all the way at the end
  • If you work up against a wall make sure your hose does not touch the wall
  • Secure the hose again at just past the halfway point

!LR4 Belts

  • Move to X min, and back and forth to get the hose to behave for the entire range of motion
  • You may need to add a bit of a twist one way or the other
  • Make sure the hose is never pulled tight

!LR4 Belts

  • The hose should sit relaxed and always fall back in to the cradle.
  • Keep an eye on your wires as well, typically they move different from the hose so you can not attach them to each other.

!LR4 Belts

  • Now the X belt
  • Wrap around an M3 screw

!LR4 Belts

  • Push the belt and screw to the bottom with a screw driver

!LR4 Belts

  • Load the belt into the X Belt tensioner
  • Make sure to get the distance right
  • Move the core back and forth SLOWLY to make sure the belt is on teh pulley and idlers properly

!LR4 Belts

  • Tension to ~7lbs (3.2kg) same as before. Loose is better than breaking things.

That is nearly it…You are ready to plug it in and take it for a test ride. No more making noises, it will do that itself!!

Setting the Z stub distance......coming soon


Initial Squaring

To square the machine, it is easiest to mark 4 points and measure the diagonal. This is how we set the Y axis homing to square the machine relative to the rail. You will probably need to repeat this a couple of times to get it under 1mm difference. This is a multiplied error, so 1mm or less is very very good.

You can use a V-Bit in your router to pop a tiny hole into some tape, or cable tie a pen to the vacuum mount and mark some points/dots.

!LR3 Fancy Picture

  • I use tape, so I can be sure I am using the correct mark.
  • Home the X and Y axis. This step is important.
  • Use the Z axis to mark a small dot at 0,0.

!LR3 Fancy Picture

  • Now drive the machine to your X axis furthest point (or very close to it).
  • Use the Z to mark the dot.

!LR3 Fancy Picture

  • Drive to the Y extreme and repeat the process for the back two corners.

!LR3 Fancy Picture

  • Now measure the diagonals to the best of your ability. Note the longer one, and subtract to find the difference. Under 1mm is very good.

Corrections are made as follows if you are over 1mm of difference. A good first guess for your offset is the difference in your measurements.

In the WebUI you can add to your Y axis pull-off distance to correct any skew. Scroll all the way down and hit save. Back on the main screen use the “Save” macro to make the changes stick after a re-boot. This is a little different on the UI V2 and V3, the important part is using the save macro.

Use the terminal on your SKR Pro or a USB connection and repetier host to add a homing offset. “M666 Y0.5” will move your Y1 stepper 0.5mm away from the stop block after it homes. “M666 Y-0.5” will move your Y2 stepper away instead. You want to move the longer dimension side away from the block. Now Use “M500” to save it to the EEPROM. Re-home X and Y and test it again.

Jamie’s Automated “Squareness Marks”

You can also automate this process with Jamie’s “Squareness Marks” test.

Home the X and Y axis.

Start with G92 X0 Y0 Z0 - Check this box and where the tip is will be 0,0,0. I suggest starting the tip just above the paper.

Z level for tip-down - Make this number more negative if you find some of your marks are not hitting the paper, but you want as light a touch as possible.

Z level for tip-up - You can go as high as you need to not drag the pen tip.

Feedrate - This is set at a safe travel rate. The Default is safe.

Extents - This is where you set the dimensions of your table. The further apart the marks, the more accurate your table will be. Old Video of this on an SKR Pro


Z Leveling

!LR3 Fancy Picture

  • Z leveling is a bit easier than the Y axis if you have a touch plate. You can also use any sort of block or piece of paper as a feeler gauge.
  • We are only looking for the difference here.

!LR3 Fancy Picture

Steps

  1. Home all three of your axis.
  2. Get Readings
  • Touch plate
  • If you are using the touch plate, You can use the probe tab for the Jackpot CNC controller or for the SKR Pro / Marlin- you probe by using G38.2 Z0 in the terminal window.
  • When it gets there, take note of the current Z position (top of the Jackpot screen or terminal-M114). Then move it up and over to your X axis extreme and probe again, taking note of the Z axis position. Take the difference and adjust the side that moved furthest.
  • The way I have started to do this is Home and probe twice on each side. So G28 Z0, G38.2 Z0, M114, G28 Z0, G38.2 Z0, M114, Then move over G0 X1250, G28 Z0, G38.2 Z0, M114, G28 Z0, G38.2 Z0, M114. From there subtract the average of both sides, M666 Z0.5, M500. Then test again. G28 Z0, G38.2 Z0, M114, G28 Z0, G38.2 Z0, M114, Then move over G0 X1250, G28 Z0, G38.2 Z0, M114, G28 Z0, G38.2 Z0, M114.

  • Feeler Gauge

  • You will drive your Z axis down until you just make contact with the touch plate and take note of the current Z axis position. Repeat this for the other end of the X axis. Take the difference and adjust the side that moved furthest.

!LR3 Fancy Picture

  1. Make adjustments
  • Jackpot CNC Controller / FluidNC

  • Adjust the Z pulloff in the settings tab.

  • Save at the bottom of the screen
  • Save macro on the home screen.
  • SKR Pro / Marlin

  • You adjust by running “M666 Z0.5” the number is in millimeters. These numbers are counting down from 200, so 120 is further away than 130. Start by adjusting 0.2mm more than your difference.

  • Save with M500 after each adjustment
  • Home all three axis and check your work (go back to Step #2).

Making the Strut plates

Warning

NEED INFO

At this point you should be ready to make some cuts. To be certain it all goes as planned, you can make a test cut in high density foam, or simply make an air cut. To make an air cut you, just home your machine above the table and run the Gcode. This lets you watch that it moves as you would expect it to and doesn’t snag or have any faults in the code.

Basic software setup

Basic CAM settings

TED-----Gcode making - TODO

The two strut plates should be 6.35mm (¼“) or thinner of MDF or similarly rigid material. Plastic or metal are fine. You will want to cut each plate as close to the side of your build as you can to assure your cut is as easy as possible. Meaning in the center of your table is NOT the best place to make cuts before you have strut plates, the sides closest the the YZ plates are the most rigid, especially when you do not have strut plates installed.

!LR3 Fancy Picture

  • Getting ready to make your first cuts all starts with loading the material.
  • Make sure the edge is behind your Endmill in the Y direction and parallel with the edge in the X direction.

!LR3 Fancy Picture

  • Checking the front and back edges relative to the table. (To the rail would be a more proper measurement)

!LR3 Fancy Picture

  • Secure the material and make sure your means will not interfere with the core as it passes over. I use screws with large heads.

!LR3 Fancy Picture

  • This is what a finished cut looks like. All parts are held in place with small tabs of material that can be cut with a saw or utility knife.

Temp to Custom Strut Plates

!Strut Plates

  • Swapping to the custom strut plates is pretty easy.
  • Start by removing the X belt, and both Y belts.

!Strut Plates

  • Loosen and remove all the front plate X rail screws.
  • Remove all four temp strut plates.
  • Raise the gantry up so the rail will clear the YZ plate

!Strut Plates

  • Slide the Top X rail out one section

!Strut Plates

  • Remove the core.
  • Add the custom strut plates keeping the screws loose.
  • Put the Core back on
  • Slide the top rail back into place
  • Snug up all the plate screws.

!Strut Plates

  • If you use a V1 board box you can use it to mark and then drill the holes in your strut plate
  • M3x10 to secure.

!Strut Plates

  • Position is not critical, center is probably best though.

!Strut Plates

  • Okay now is a good time to double check your heal toe measurements are equal.
  • Simply measure across the front of your machine

!Strut Plates

  • Now measure across the back
  • The two numbers should be identical.
  • If they are not the machine can wander when not under power.
  • The adjustment would be to check your end braces to rail connection and to verify your lower X rail is not actually touching the XZ plate. If it is trim or file your rail a bit shorter.

It is best practice to verify your XY square and you Z beam level, they should not have changed unless something got bumped so always run a quick check.

At this point you are done, you have a fully functional machine! How cool is that!?!


Build experience

How did it go for you?

Now that you have a V1 Engineering CNC Machine how about you put a little pin in our map!?!

Go get it dirty, be safe, have fun!