Hey guys so i have a weird problem on my lowrider 3
my left stepper motor skips steps when cutting For example when cutting the slightest resistants it gets it skips steps
I tried moving the y axies and holding back the stepper motor with my hands and the Right Side was very hard to stop as for the Left Side it as i held it it skipped steps can anyone help?
i forgot to mention
It was working fine all the time (2months) just encountered this
i thought the belt was tight so i loosen it same issue
The motor skipping makes a pretty distinctive sound, like grinding gears (though it isn’t grinding) if there is no sound like that, check your grub screws those still cause more problems for people…
The other thing to check is wiring. An intermittant connection from a worn wire or bad dupont crimp will cause problems. This is even more suspect if it happens at or near the same location consistently, but even if not, it’s worth checking.
Just to be clear, you swapped the stepper wires at the control board, and the issue stayed on the same side? If so, you’ve eliminated the stepper driver as the source of your issue. That still leaves the stepper motor, the wiring, and a mechanical issue.
Check the grub screws on the connector between the stepper motor and the pulley.
Swap stepper motors between the Y1 and Y2 (likely not an easy job).
If there is no mechanical fault, and the problem stays on the same side when swapping the stepper motor from Y1 to Y2, then it is likely a wiring issue. If it moves to the other side, then it is a stepper motor issue.
Personally, I suspect it is a wiring issue. It is rare for a stepper motor to go bad.
i swap the stepper wires same issue, i checked the grub screw its good, lol not looking forward to swapping the motors ill do it tomorrow and ill see what happens
So, holding position is easy, but left stepper skips when trying to move, hmm… Wondering if/what’s causing too much drag/resistance? Noticed hidden belts in Superstrut, looks like you checked tension already (first post). When stepper power is off, does it feel like the same pressure is needed to push and pull the gantry along the Y axis? If belt tension isn’t the problem, am wondering if debris/dust on idlers, pulleys, or belt are an issue? Hopefully idlers move freely, are well lubed. Already done close inspection of belt with flash light, do belt teeth look clean and undamaged? Guessing you’re using Belt from V1E with fiberglass core (i.e. not steel)?
Like the look of the Superstrut hidden belts, but I don’t know if/what different forces and/or drag and/or wear this design causes that could be contributing to the stepper issue.
Nice setup. Am looking forward to learning how you fixed
I saw your video on youtube haha your was the vid that convinced me into going Lowrider
right so I check the same pressure is needed on both sides to move (it moves freely)
I checked the wiring I swapped the drivers same issue
UPDATE
I just checked the material I was cutting had a slight bow in it so it was cutting 2mm deeper than expected
The job - 1010mm/min 12600rpm 3.5doc on 1/2’’ ply
A single flute 3mm upcut bit
this was the job that made me realize this issue but I mostly cut PVC which is softer looking bad at it now this shouldn’t be an issue anymore for me but it still bugs me not to find out why both sides have a different torque pressure.
Also, my current voltages are all set to 900ma if I change both to 1000ma will i cause any harm to the machine is that safe (i don’t have much knowledge in this as yet lol)
