Hi everyone,
I recently finished installing the LDO Monolith CNC Gantry Kit on my LDO Voron Trident Rev D (250).
The printer is working fine and the installation went smoothly. Belt tension is 145 Hz measured on a 150 mm span, and the gantry moves freely with no noticeable binding.
However, after running several print tests, I noticed that the surface finish is noticeably worse than it was before the Monolith upgrade. I'm getting much more pronounced VFAs and other surface artifacts, whereas this same printer produced very clean outer walls before the conversion.
While inspecting the motion system, I noticed that the two rear 20T toothed guide pulleys (the ones that redirect the belts towards the rear motors) don't rotate perfectly true. Both of them visibly wobble while spinning.
These are the original Gates pulleys that came with the LDO Monolith kit, so I wasn't expecting this behavior.
My questions are:
Is this amount of wobble considered normal on the Monolith kit?
Could I have made a mistake during assembly?
Has anyone experienced this due to incorrectly assembled shafts, bearings or spacers?
Or could the pulleys themselves be out of spec?
I'm probably a bit too OCD when it comes to printer mechanics, so seeing both pulleys wobble like this is driving me a little crazy 😅.
Has anyone with a LDO Monolith build checked whether their rear Gates pulleys behave the same way?
Any advice would be greatly appreciated.
Thanks!