MPCNC Primo Parts¶
Printed Parts Sizes¶
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).
Hardware store steel EMT conduit works well and is inexpensive; an upgrade would be .065” (max is 0.120”) wall thickness stainless steel tubing or DOM. Stainless steel tubing is more rigid and smooth, but also much more expensive, Dom is less expensive than Stainless but requires some coating to prevent rust.
Recommended Print Settings: PLA for dimensional accuracy (PETG is also acceptable, if your dimensions are verified good and you are willing to sacrifice some rigidity). 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.
If your 3D printer is of questionable quality it is best to run a quick basic frame test to make sure the parts will print as intended. If the test indicates that your frame is not square, then carefully check the frame and adjust, and retest. If you have to square the frame, then you might also consider printing the Advanced frame test. Investing time on this up front is much better than printing parts for four days and then finding that your calibration or frame is off.
|Files can be found at|
Primo Printed Parts List¶
|2||Corner Bottom Mirrored||45%+||B|
|2||Corner Top Mirrored||45%+||A|
|2||Lower Belt Mirrored||45%+||A|
|2||Upper Belt Mirrored||45%+||B|
|4||Corner Leg Lock||45%+||B|
|4||Stop Block (Dual only)||45%+||A|
|1||Upper Tool Plate||45%+||A|
|1||Lower Tool Plate||45%+||A|
|2||Core Z Clamp 1||45%+||A|
|2||Core Z Clamp 2||45%+||A|
A tool mount is also needed for your specific tool. A list of mounts I have designed are below. You can also find user designed mounts on PrusaPrinters and Thingiverse by searching “MPCNC Primo” and your tool name.
Color is the default color scheme I use to print the kits. Color
A is one color of filament, and
B is the second color of filament.
The core can be printed with varible infill to save time and plastic. 70%/30%/70% split at 24mm and 116mm.
Total weight in PLA is approximately 2.2kg.
Print times have varied from 65hrs (0.5mm nozzle @38mm/s), to 120hrs (0.4mm @60+mm/s), and 160hrs (0.4mm nozzle @35mm/s).
The kits in the V1 Shop contain all of the following hardware. Currently it is not available separately.
|5/16 locknut||M8 locknut||46|
This version uses both sizes of hardware equally well. No issues with metric bolts what so ever.
Bolts need to be hex head, screws pan head. If you choose to use cap head you will need washers and perhaps a little extra length.
The kits in the V1 Shop contain all of the following components. Some of these are affiliate links, you can buy from these links or just use them for information.
I try to keep the Amazon links up to date, but they can sometimes change products without changing the item number. So be careful when looking at these links to compare against the offerings in the shop. If you’re not sure, drop a question in the forums.
|Part||QTY||V1 Link||Other Link|
|Nema 17 50OZ/in+||5||Shop||Amazon|
|* Belt GT2 10mm||4||Shop||Amazon|
|Pulley 16t gt2 10mm||4||Shop||Amazon|
|Idler 20t gt2 10mm||8||Shop||Amazon|
|Wiring kit||1||Shop||Custom Made for V1|
|5mm to 8mm Coupler||1||Shop||Amazon|
- Use the calculator to determine belt length.
Do not use Steel reinforced belts, they will fail 100% of the time. Fiber reinforced only.
|Mount Files can be found at|
More to come.
You are able to use tool mounts originally designed for the Burly MPCNC, you just need to use the Burly tool mount and nut traps.
- Blank tool mount, HERE, to design your own.
The blank tool mount needs details.
Update from Burly to Primo¶
Kits are available in the V1 Shop.
|10mm GT2 Pulleys||4|
|10mm GT2 20T Idlers||8|
|5/16”x1.5” Bolts (M8x40mm)||46|
|5/16” Nylock (M8)||1|
|M5x30mm Phillips Pan Head Screws||64|
|M2.5x12mm Phillips Pan Head Screws||10|
|*10mm GT2 belt.||?M|
*While you can use your 6mm belt, I suggest you upgrade to 10mm belt. Use the calculator for the amount you need.