While lowering the z axis noticed that the bottom z axis motor wasnt always working but was able to get it to go to the bottom after sending some extra -z commands. Double checked both z axis poles where parallel to each other and perpendicular to the sled checked out good so decided to run a calibration as it wouldnt use the z axis. 3x3 grid calibration on point 3 noticed the second from the top motor was spinning(releasing belt) to the point it was tangled and starting to wrap around the opposite direction. Pulled power to stop if from going any farther and causing more damage. It did end up pinching and belt is in two pieces. I wondered if it was two seperate events or connected. First i cleared the broken belt and plugged maslow back in. I swapped the wires for the z axis so that the top z axis port was connected to the bottom motor and the bottom port was connected to the top motor. Hit z+ and now the bottom z motor works but not the top. So can confirm pcb issue with that. Next onto the second from the top belt issue. Didnt know how to test this one so started out putting what belt was left properly back threw the assembly and connected the arm end. Much shorter but should work for testing. Got everything put back together and ran a retract it went good and pulled all sides in normally. I updated config to only let out 500 as i knew there was at least that amount of belt left on the broken one. This is where the second problem showed up again. During extend the same motor that was running in reverse before did the same thing again and did not stop after letting out the same amount as other instead it unwound the belt and started to wind up the belt backwards pulled power to stop any damage. Swapping the motor wires causes the same issue to any motor thats connect to the second from the top port so another pcb problem.
What do you think @bar? Any suggestions or other things i should check?
Hm.. motors running in reverse could a floating pin issue on the encoder board. Solved in later PCB’s, but if you have a Maslow rev. 4.0, this could be your issue. Fix available (needs some effort). It’s unrelated to the Z axis problems tho.
I have 4.1 and the motor isnt running in reverse. It doesnt turn off and pulls all the belt out. The only thing that stops it is me pulling power. Could have clarified that better still learning terms and things related to maslow.
I haven’t seen that issue with the motor before, but it sounds like you need a new PCB either way. (I DM’d you a code in the other thread)
I’d order an extra new encoder at the same time. I don’t think it’s an encoder issue, but I’d rather you have it just in case.