ProosaXY (Prusa Mk3 CoreXY Conversion Kit)

ProosaXY is a Prusa MK3/S CoreXY conversion kit that aims to get more performance out of your 6 years old machine with the lowest cost possible by re-using most of the stock MK3/S parts.

Make sure you read the open beta kit notes.

Specs

Better performance (check input-shaper in pictures).
Triple Z (independent or sync based on controller board)
Single v6 hot end (default) or mixed 2-in-1-out hot end (WIP).
Optional AUX cooling fan.
Semi-enclosed (default) or fully-enclosed with top hat (coming soon).
Our industrial leading SnakeOil technology 😉

Notes

This mod requires some drilling on the original center frame plate and cutting the original motor leadscrews. This drilling/cutting is easy enough to be done with a hand drill and a hacksaw BUT THERE IS NO WAY BACK. You won't be able to convert back to the original MK3/s machine if you change your mind later.
To keep the cost down and reuse old components, there are some trade-offs I made:

The machine is semi-enclosed by default and will need some printed panels and a top hats to fully enclose it.
To match the frame height, cutting the motor leadscrew and linear shafts is required.

What's in the Kit

All new extrusions (drilled and tapped)
Fastener/Screw/Washer kit with 20% extras *except for a few sizes mentioned in notes below
2x HoneyBadger Nema 17 48mm motors
1x 3rd Z motor w/ integrated lead screw
1x Sherpa mini extruder
4m Original Gates 2GT 6mm belt
1x GDSTIME 120120x32mm 12v blower fan (aux fan)
4x Rubber feet
36x F623RS bearing
4x 2GT 16T idler 3mm bore
2x 370mm linear shaft (d=8)
2x 330mm linear shaft (d=8)
3x 260mm linear shaft (d=8)
6x linear bearings
1x Rubber tape (60x18x0.5mm)
14x 2020 corner bracket
4x 1515 corner bracket
2x Din rail 329mm
1x Din rail 430mm
3x POM T8 nut

Open Beta Kit Specific Notes

We're offering beta kits at a discounted price for customers who are willing to address the notes below during their build. These issues will be fixed in the production version of the kit.

Beta Kit - Things to FIX

Frame extrusions:

We found some extrusions in beta kits that were not cut 100% square, but are still usable. Use the included corner brackets to ensure everything lines up.
Check for "fence burs" in the tapped ends and sand/file as necessary.
Extra wrench hole in two extrusions for easier motor mount access (optional).

Motors:
- Motor shafts are a little short (23mm instead of 25mm) and only make minimal contact with the support bearings.
- Also, the support bearings may be too tight to fit properly on the motor shaft. Some sanding/filing may be necessary, or simply install without the support bearings.
Cut rubber tape into two strips of 5x48mm
DIN rails may be a tight fit. Shorten by ~1mm (if necessary)
Aux fan is 12v (instead of 24v) so be sure to use a buck converter or an MCU with selectable voltage

Beta Kit - Things to ADD

+12 m3 square nuts
+12 m3x25mm button head screws
+2 m3x30mm socket head screws
24v hotend fan and part cooling fans **be sure to use a buck converter or an MCU with selectable voltage if you're re-using your existing 5v fans
Drill bits and m3 tap for drilling front center frame plate (optional)

2.6mm drill bit
5mm drill bit
m3 tap

We also recommend upgrading your MCU and hotend to take full advantage of the increased speed.

Venture XL

Venture XL

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