TronXY X5S remote driver modification

thingiverse

A modification of the original TronXY motor scheme uses an 8mm steel axle to position the stepper motor at the bottom and transfer torque to a pinion that's also an easily adjustable belt tensioner. The goal is to be able to easily adjust the CoreXY belt length and balance, and to remove the horizontal load from the stepper's bearings. Additional parts required (per axis): - 8mm steel rod or linear rail, approximately 500 mm long - A 4mm screw and threaded brass inserts for the adjustment knobs (a plain 4mm screw will also work) - 608zz ball bearing - 2GT gear, 20T, 8mm hole - 5-to-8-mm adapter - T-nuts and screws (M4 x 8mm worked well for me) Check out these short videos describing the idea: Sliding ball bearing, upper mount: https://www.instagram.com/p/B_2sYK1qjyd/ Adjusting/balancing the coreXY for parallel motion: https://www.instagram.com/p/B_24d3fIUlA/ Originally I also added a 1:1.8 belt gear, but this proved detrimental overall. The loss of torque due to the higher primary-side rotation speed was too high, limiting top speed and acceleration. I've opted for keeping the motor connected through flex couplers only, and attaching the motors using simple aluminum L profiles near the bottom of the frame.