I have been given a L3R. It was previously set up on a large 3m x 5m table but I have modified it to sit on a 1200mm x 1400mm table and I’m struggling with a persistent Z height mismatch between the left and right sides. I want to understand the root cause rather than mask it with pull-up offsets.
After homing Z, the two sides of the X gantry are consistently ~8 mm different in height (measured from table to a fixed point on each Z assembly). This directly shows up as uneven cutting depth across X.
Table is flat and level Squareness test done (4-corner mark + diagonal measurement) — machine is square. Using a touch plate and probing at three points across X:
Near Z home side: -37.170 Middle: -43.530 Far side: -44.770
So the far side is ~7.6 mm lower than the near side and this is with one switch housing moved up and the other down,
If anyone has seen this magnitude of Z mismatch before on a LowRider, I’d really appreciate your insight
Thanks in advance — happy to provide photos, config, or measurements if needed.
Can you post a pic of both of your YZ plates? I am wondering if your Z endstops are adjusted differently with one much higher than the other. Also can you post a pic of your build on the table?
Being a new user you might only be able to post one pic at a time. But that goes away quickly after you read a few other thread and like a few things.
On the X min (non rail side) loosen the M5 screw a little and move the Z endstop up. Try to get it within a mm or 2 from side to side. Then you can adjust the rest with the pull off adjustments.
I have tried messing with these and ended up with one fully up and one fully down which gave me the 8mm diff. If they are both the same it’s more like 10-11mm difference. I have spoken to the previous owner and he said his config had a +9mm adjustment for a waist board but not sure what this means? I know I can fix with a pull off adjustment but just seems a lot and would rather get it within 2mm if possible then adjust pull off. Is it worth loading a default config and if so where can I find it?
no its mounted to a piece of 18mm form ply. The wheel side runs directly on this and the rail clips mount to this also. There is a MDF spoil board in the middle. Table is level
Could it be software related at all? Just seems strange the old owner said he had some soft of 9mm offset. Im not that familiar with the software side yet. Ideally I would like to load a fresh config but not sure where it’s located or the procedure.
Yes one is a lever and one is a lever with a ball. I have ordered some more just in case but I dont think that would throw it off 8-10mm as they are sitting at the same height
