Prusa i3 MK2S y-parts by GMagician

Last crawled date: 3 years ago

Here is my solution for y-axis parts.
motor:
this part is derived from Tom3D cheaper Prusa i3 one. The biggest difference are: 3 screw fix and motor that is raised 1mm (don't know why but also original part is 1 mm lower).
Now both motor and idler are aligned
belt holder:
this part is derived from thing:57533 but for GT2-2 belt
chain elements:
are smaller with an open to easily insert/remove cables, 12 elements are needed
bed & thermistore cables pass through a hole in the frame, under motor screws, see picture
tensioner:
is designed to replace original idler (y limits are not changed) and to be easily removed and installed.This version is designed for fixing M8 nuts in lower rod
BOM:
motor:
3 M3x18 (DIN 912/ISO 4762) (1 screw more than original part)
2 M3x10 (DIN 912/ISO 4762) (endstop)

belt holder:
2 M3x14 (DIN 912/ISO 4762)
2 M3 nylock nut (DIN 985/ISO 7040) (I don't have MK42 heat bed)

tensioner
1 M3x25 (DIN 912/ISO 4762) (as original part)
2 M3 washer (DIN 125/ISO 7089) (as original part)
1 M3 nylock nut (DIN 985/ISO 7040) (as original part)
2 M3x16 (DIN 912/ISO 4762)
2 M3 square nuts (DIN 562)

chain element with holder
1 M3x6 (DIN 7991)
1 2,5x100 zip to hold wires

lm8uu holders
6 M3x14 (DIN 7380)
6 M3 washer (DIN 125/ISO 7089)
6 M3 nylock nut (DIN 985/ISO 7040)

2018-03-10:
Final revisited version. Bigger change is on belt tensioner. Nuts are re-moved to top rod (like prusa) and I used thread locker glue (but Nylock nuts can be used as well) to keep them hold in position and let tensioner to slide (previous solution is in 'V3 solution.zip).
2018-01-06:
Changed body and added lockers since my nuts like to unscrew themselves and belt loose (these parts are not yet printed/tested, my printer is dead at the moment)
2018-01-03:
Added modified z-bottom and z-top. You can use only bottom left to connect chain but if you replace all these items you can also solve issue reported in 'https://github.com/prusa3d/Original-Prusa-i3/issues/34'.
Another solution is posted in https://www.thingiverse.com/thing:2556656 and is specific for Dondolo
2018-01-02:
Soon I'll replace my old glass with ultrabase glass and alluminium plate hole is no more available to fix chain so I adopted this new solution. Since I also have new igus lm8uu I've completely changed approach (previous solution is in 'V2 solution.zip)
2017-11-26:
New bed chain solution (original solution is stored in 'V1_solution.zip')
To connect chain to frame use new bottom in https://www.thingiverse.com/thing:2556656 (bottom and top items need to be used in same time because different from original Prusa I3)
2017-11-22:
I'm going to change and remove chain under bed. It's difficult to manage cables removal
and hard to print frame connector.
New solution will be to put chain on bed side (see https://www.thingiverse.com/thing:1874802) and "frame connector" will require a change in bottom motor support (new motor support is required).
Already printed and it seems to work very well
2017-11-08:
added missing cap
screw and cap thread has been revisited (less skew, not reprinted)
2017-11-02:
y-belt-holder reinforcement and added wires passage
y-frame connection added (still sperimental)
y-chain-element (Bigger upper cut for wires)