These parts will convert the corexy of a hypercube to allow it to be driven from the rear, keeping the front clear of belts and motors.

I have this currently installed and is working, some tweeks may be made in the future.

Parts Required (# if reusing parts from original mounts):

M3 x 50mm Bolt - 2 off. (2) For stepper idler bearing. M3 x 8 or 10mm Bolt - 8 off. (0) For stepper motor fixation M3 x 22mm Bolt - 2 off. (2) For front idlers M3 x 35mm Bolt - 2 off. (2) For rear idlers M3 washers - 10 off. (10) For stepper fixation & idler bearing M3 Nylock Nut - 4 off. (2) For frame idler bearings M3 Nut - 2 off. (2) For stepper idler bolt

GT2 16T Smooth Idler Bearing (or 4x original bearings) - 2 off. (2) For stepper idler. GT2 16T Idler Bearing - 2 off. (2) For rear idlers. GT2 20T Idler Bearing - 2 off. (2) For front idlers New GT2 6mm Belt - Your original belt length will be too short.

Please Note:

This conversion requires 8mm Y shafts as the rear idler bearings mount had to be combined with the rear clamp bracket.

Print one of each part.

Updates

20/02/2021

• I have now run this design for more than 150 print hours, it seem to perform ok, no issues with prints or belt wear.
• Only issues so far is the bearings have failed on the 2 rear toothed idlers. These were of dubious quality so have replaced with a known good supplier. Will monitor to see if this is down to design issue or poorly manufactured part. It may be that i redesign the idlers to a larger tooth count and use dowl pins to secure to ensure a secure fit on the bearings.

22/07/2020 - Adjusted offset to *_front_roller.stl to correctly align belt path. - Added hammer nut slots to *_rear_mount.stl.

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