upgrade lowcost mk3 to mk4 (add square nut captive gap)
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Add a square nut captive gap for lower-inner linear bearing housing screws, and other fixes...
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Add a square nut captive gap for lower-inner linear bearing housing screws, Added pockets to top Z brackets to accommodate Z lead screws.
The captive gap is required since the geometrical changes to make this parts compatible with MK3S+ style extruder; ended up moving the lower smoot rod to partially cover the lower-inner housing screws. With this mod now a square nut and a M3x18mm screw can be used instead.
Follow the original printing instructions, no supports print smooth rod orifices facing down on the plate.
Notes (2023-04-26) requirements I found from original:
- Bearings needed are LM10LUU (the long version)
- Bearing housing
- 4x M3x30mm for all the ones that go through
- 4x M3x18 and 4x square nuts
- The idler needs a Pan type screw M3x20mm, the regular screw will hit/rub the Z lead screw
- Also found the hard way that this requires a longer X belt
v1.3 2023-04-29
- Added modify y-motor-holder, shorter top part to:
- Allow MK3S+ Y frame to pass over the motor bracket
- Pass belt-test axis lenght test
v1.2 2023-04-27
- Updated to Z lead screw top left and right, for a better gap with lead screw
v1.1 2023-04-26
- Fix issue with square nut hole in motor side bracket on the holes for Z lead screw nut This issue was present on original
- Fixed issue with top brackets where original Z lead screws are to long, added pocket to compensate, This came from the original Prusa MK4 Printable Parts
v1.0 2023-04-24
- Initial Remix Release