The Enderwire non-pro's Y axis is quite wobbly due to the single MGN12h rail in the middle of the whole assembly. I searched for a solution to use two MGN12h rails while still using most of the original conversion files, so i came up with this solution.
I highly recommend to only do this mod, if you have a second printer. Even if only the Y axis is modified, you will have to almost fully disassemble the whole machine,
Moreover the middle 2040 extrusion has to be completely straight (no “banana shape”) and needs to be perfectly aligned with the two new 2020 profiles. Otherwise the rails could get racked or the anchor belt notch will rubb against the 2040 v slot. It is important, because the rails arent sitting on the same extrusion anymore, see picture below.
Even though I've put a lot of work into this project, I can't rule out the possibility that some parts won't fit in certain cases. You do this mod on your own responsibility.
There are two different options to fix the 2020 extrusions to the existing 4040 extrusion.
Option 1 : Use 4x 2020 90° corners like these and connect the extrusions (you may need to sand down the little alignment notches) :
Option 2 : drill 4x 5,4mm holes into the 4040 extrusions with following dimensions to fix the extrusions directly with screws and T-nuts :
Align the 320mm extrusions with the provided Jig, make sure they are perfectly parallel to the existing 2040 extrusion.
Screw both mounting plates together, then mount it to the Y carriage plate using the existing M5 holes (marked in green). Use the M3 holes in the mounting plate to mark the 8 holes on the Y carriage plate, remove the printed mounting plates and drill the 8x 3mm holes into the plate (marked in yellow) :
Mount the new upper deckplates, these contain slots for the new 2020 extrusions
Assemble the rear motor mount ( made of 3 parts to ensure good printability)
Mount the rear motor mount and the front idler to the extrusions
Place the two MGN12 rails onto the extrusions but do not fully tighten them
Twist the drag chain endpiece by 180 degree (marked in blue), screw it to the mounting plates (you wont have access to the screws later!).
Route and fix the belt like in the normal conversion.
Place the prepared Y carriage plate onto the mounting plates, place all screws but do not tighten them
Now the tricky part - alignment of everything. If everything runs smoothly, tighten alle screws on the rails and on the carriage.
