I have a robo r1+ that makes squealing noises when homing the y axis. I have had to replace the glass bed and ever since then I have never been able to print reliably with this printer. I thought It might of been the firmware because I added a lcd to the printer so I tried to upload the upgraded firmware from robo but that didn’t help. Then I found a marlin version by a user named whereswaldo which seemed to work fine until I couldn’t get a level bed. I was going to install it again but then i couldn’t find it anymore or i couldn’t get it to upload without errors. I have tried arduino 1.8.12, 1.6.9, and 1.0.6 with no luck. So I tried to upload another version of robo firmware called ROBO3DR1PLUSV2 and it seemed to upload fine on arduino 1.0.6. However I get this squealing noise now when homing the y axis. It squeals and doesn’t move. It moves fine by hand though. I have no idea what to do anymore. I have spent some many hours working on this that my head is about to explode. Any help that will get me back to a normal since of printing would be a life saver. Thanks.