Tronxy X5 series simple Z sync mod

thingiverse

Proudly introducing the "Starfighter's simple Z sync mod"! The propably most simple Z axis sync mod for the tronxy x5 series on the planet. :) My Z axis are moving so freely, that they always got out of sync as soon as the steppers were turned off. Sometimes the printbed just started going down all the way! After all the mods out there were way to complicated IMHO, I started to design my own. This design does NOT need any modification on the printer and allows the use of a open loop belt. So far it works like a charm! Only needs 2 pulleys and 1 belt connector (both STL's included here) plus a GT2 belt, 2 bolts with nuts (M3 or M4) and a zip tie (optional). Of course you can use any belt profile with matching pulleys, but the only matching connectors i could find were GT2 and GT3. I used this pulley with 60 teeth (https://www.thingiverse.com/thing:3889784), just added a hole for M4 bolt and nut as I didn't have M3's handy. But the M3 holes are still there and useable. Also a version with 80 teeth is included. Basically any pulley can be used but I recommend to use at least 60 teeth (the bigger the better), to minimize the risk of the belt slipping when the connector runs over it! Further the pulley should be low profile to fit under the coupler on the stepper motor's shaft. Also the belt connector was modified to fit inside the pulley, and grooved for a zip tie. It may be needed to sand it a little, so the belt won't jump when the connector runs over the pulley (I had to).