When moving along the Y axis i have a bad vibration and noise.
I have checked tension on belts and all connections. Everything is good. When I remove the belts, the gantry moves smoothly along Y axis.
I have noticed that when I start a movement along the Y axis the right side stepper always seems to start its motion a split second before the left. I’ve also noticed that after a motion is complete, if you gently try to turn the spindle on the right stepper it is solid and will not turn. But if you try to turn the left stepper spindle, it will move 1/8" in both directions.
Is this a bad stepper motor? Any other troubleshooting tips I should be looking at?
I would check belt tensions, and I would unplug connectors and reconnect them. This has happened to me a few times…probably not the stepper motor. But even if it is…you’ll want to look at that first. There is some complete trouble shooting for this on multiple threads. Use the search (magnifying glass on upper right on desktop) and searh “y axis noise”
Check all wiring and connections — is everything secure and in good condition?
Are the pulley set screws securely in place? Put a “witness mark” across the end of the motor shaft/pulley so as to monitor/check for slipping.
Belts securely anchored and well-tensioned?
Power down and slowly/gently move the machine to the center of motion for each axis, then remove both Y-axis belts — are they in good condition?
Power up and connect to the machine and try to initialize — the Z-axis should home as normal, then the machine will try to home the X- and Y-axes — the X-axis should also home as normal, while the Y-axis motors should turn until they time out. Do they turn evenly and in synch?
If it moves when you remove the pully on the Y axis it could also mean your X&Y axis is out of square. Measure corner to corner on your CNC bed to see if the measurements are the same.