MPCNC Parts

Printed Parts

There are 3 different sets of printed parts C-23.5mm, F-25mm, or J-25.4mm (1 inch). The measurement is for the Outside Diameter of the conduit/rails/tubing. Please measure your rails before printing! 23.5mm fits ¾″ EMT conduit in the US. Anywhere else you must physically measure first. Some things are sold as Inside Dimension (ID) (conduit), or Outside Dimension (OD) (tubing). If you print for the wrong size tube, it’s a bummer!

Hardware store steel EMT conduit works well and is inexpensive; an upgrade would be .049” wall thickness stainless steel tubing (or thicker is fine as well). Stainless steel tubing is more rigid and smooth, but also much more expensive.

Recommended Print Settings: PLA for dimensional accuracy (PETG is also good, if your dimensions are verified good). Two or more perimeters for through hole strength. There are some steep walls so no more than 75% layer height to nozzle diameter. No support should be needed for any part I have designed.

PrusaPrinters.org;My Files

Thingiverse.com; Download 23.5 mm (“C”) parts files
Download 25 mm (“F”) parts files
Download 25.4 mm (“J”) parts files

QTY Name Infill Time Per Part/Total Grams Per Part/Total
2 Bottom_Corner* 55% 2:35 / 5:10 34.7 / 69.4
2 BottomM_Corner* 55% 2:35 / 5:10 34.7 / 69.4
2 Lock-Corner* 55% 1:28 / 2:56 20.8 / 41.7
2 LockM_Corner* 55% 1:28 / 2:56 20.8 / 41.7
2 Top_Corner* 55% 2:06 / 4:12 32.9 / 66.1
2 TopM_Corner* 55% 2:06 / 4:12 32.9 / 66.1
4 Spacer_Corner_*_Burly 65% 0:15 / 1:05 4.2 / 16.6
4 *-Foot_2018 35% 2:20 / 9:20 31.8 / 127.1
2 *-Roller 55% 5:35 / 11:10 90 / 180
2 *-Roller M 55% 5:35 / 11:10 90 / 180
4 RollerMount 55% 3:30 / 14:00 50 / 200
4 RollerPlate (optional Dual) 55% 0:10 / 0:40 2 / 8
2 XY_*_Burly 55% 11:00 / 22:00 201 / 402
2 XYZ_*_Burly 65% 5:00 / 10:00 71.5 / 143
2 Gantry_Spacer_* 55% 0:22 / 0:45 10.3 / 10.3
2 Nut_Trap_Burly 55% 0:27 / 0:55 16 / 32
1 Tool_Mount_*_4mm/6-32 35% 4:45 / 4:45 63.4 / 63.4
1 Z_Lower_*_Burly 55% 2:15 / 2:15 35 / 35
1 Z_Motor_*_Burly 55% 2:15 / 2:15 31 / 31
Total Total
≈115 hrs 1.8 kg

*: The asterisk stands for part letter (C, J, F) and anything after that is the current revision (Burly, v1, v2)
M: Mirrored parts, either see the build instructions or FAQ if you are worried.

Printed Parts Changelog
10/15/18 – Burly Center & Z
4/1/18 – Optional dual plate
3/19/18 – New foot
5/9/17 – lead screw compatible XYZ
7/13/16 – New Rollers
5/25/16 – New middle and Z-Axis assemblies
4/24/16 – New corner assembly

Electronics/Motion Parts

Recommended electronics, you have a lot of options. I chose these specific parts for price vs. performance.

Some of these are affiliate links, you can buy from these links or just use them for information. In case you didn’t know amazon prime is free for students, and here is a free 30 day trial for non students.

Qty Part Link
1 Mini-RAMBo (or RAMBo) Amazon or Shop
1 12v ≥5A power supply Amazon or Shop
4m (≈13 ft)
[Note 1]
GT2 belt, do not get the steel reinforced ones Amazon or Shop
4 GT2 16T Pulley Amazon or Shop
53 608 2-RS Bearings Amazon or Shop
≈18ft [Note 1] Rails (Conduit or Stainless Steel) Info, InfoCalculator
5 Nema 17 Steppers Amazon or Shop
1 Wiring harness (Or extended your stepper plugs with Stranded Wire) Wiring Kit, Stranded Wire
≥20 Zip Ties Amazon or Shop

Note 1: These dimensions are for a 24”x24” working area (610x610 mm). This size has approximately 36”x36” external dimensions (914x914 mm). See the calculator for other dimensions.

Spindle Options

Spindle Link
Best Option Dewalt 660 (600W) 120V Amazon
Second Choice Spindle 300W-800W AmazonAliExpress

Blank tool mount for any other tools you might want to use.

Hardware

Hardware and quantities needed:

Qty Imperial Metric Link
1 T8 Leadscrew and nut T8 Leadscrew and nut Amazon or Shop
1 Lube for the T8 Lube for the T8 Shop
1 5mm-8mm coupler 5mm-8mm coupler Shop
1 5/16-18 X 5 M8 X 130 Amazon
12 5/16-18 X 2.5 M8 X 65 Amazon
2 5/16-18 X 1.5 M8 X 40 [Note 2] Amazon
28 5/16-18 X 1.25 M8 X 30 Amazon
43 5/16-18 Nylock Nuts M8 Nylock Nuts Amazon
19 M3 X 10 M3 X 10 Amazon
57 #6-32 X.75 M4 X 20 [Note 3] Amazon
57 #6-32 Nylock nuts M4 [Note 3] Amazon

Note 2: The M8x40mm bolts cannot be cap heads, or you will need to grind the heads for clearance
Note 3: Using M4 nuts and bolts in place of #6 is possible, but the difference in the size of nuts requires some creative tightening on a few parts. A small flat head screw driver can usually be wedged in to stop the nuts from rotating. As another option, here are some quick print sleeves.