I've noticed that the Y stepper motor has been stalling, approximately 2-3 times in the last couple of weeks or so. This occurs, generally, hours after the machine has been turned on, but not running any jobs or operations. 2 questions: 1. I adjusted the current for the stepper motor on the blackbox by turning it counterclockwise. Besides it failing again and the red light indicator, is there another indicator that would help me to identify if I need to adjust the current down or up? (Once it stalled, it was cold to the touch, which to me was the biggest indicator something was/is wrong with it. 2. After I resolve the issue, what's the correct procedure for ensuring that both Y and Y2 are insync with each other? I've been measuring from the front ends of the machine to the gantry plate on each side and if they're off, I unplug one and adjust it until it matches. Super annoying with this issue here. Thank you!
Most common reason for this -mechanical binding, with the motor disconnected can the screw be turned by hand easily (same on both sides) -bad wire connection on motor check the plugs and wire connections -Wheels set too tight -anti-backlash nut too tight Also can be acceleration is too high or max speed is too high, try reducing those. Is the BlackBox getting good airflow? fan works? You turned the current down? If you are running the high torque OpenBuilds motors anywhere from half to 3/4 from full power is good. Regards Gary
If it stalls with the Red Exclamation, refer the 2nd half of docs:blackbox-x32:currentadjustment [OpenBuilds Documentation] If it does not trigger the Fault LED it might be set too low, or be a wiring issue: docs:blackbox-x32:faq-identify-motor-coils [OpenBuilds Documentation]
Can the screw be turned by hand easily (same on both sides)? Unknown which screw exactly. The flexible coupling? Wheels too tight? Possibly Anti backlash nut can only be turned via socket wrench. Good airflow on the blackbox, fan works, no enclosure, it's all open. fan facing up. high torque OpenBuilds motors anywhere from half to 3/4 from full power is good. Assuming that full power was how it was set at factory? the other appears to be in similar configuration. Currentadjutment setting, after moving the Y clockwise about a quarter turn
So your lead screw is so tight on the backlash nut it can only be turned by a wrench? lead screw and anti-backlash nut should turn smoothly and easily, can break-in using a drill if needed. To break in the nut chuck the lead screw into a drill and run the nut (with the anti-backlash screw full loose) up and down the full length a until its moving smoothly and easily. If you are using the anti-backlash type, then make sure the tension screw is not putting much if any pressure on the nut, don't want it tight! full clockwise is full current. from factory is about half and should be fine. Gary
I suspect my terminology of each piece is not accurate lol, still learning everything here. After watching the video a few times, I loosened the lead screws, that attach the anti backlash nut block to the plates and ran it up and down the y a few times, feels like normal operations once again. In order to get alignment for the Y1 and Y2 rails, is it best to measure the distance from the front to the gantry on each side and then adjust as necessary? I've noticed it gets out of alignment when the Y1 stalled and Y2 ran on it's own until I panickily stopped the machine.
Check out Tramming: A generic guideline Whatever is skewed could be compounded by something else lower down in the chain too. Key thing is in the world where the machine moves, it has to be flat, square and true in every direction
If your frame is square you can jog it all the way forward until one side touches the front frame, provided you are not racked way out of square. Then unplug the other moto and turn by hand until the other also touches. However, if you have soft limits set, you may have to disable them. I personally just use 1 2 3 blocks on each side and that way I am within the boundaries of my soft limits. I routinely check the square of my machine this way and then home the machine afterwards.
