Bed Dropping
Posted: Thu Oct 21, 2021 12:01 am
I am having issues with the bed dropping during a print and creating a bird nest. I have an early M2 and it was a reliable workhorse for years. No issues. A little over a year ago, I did a major upgrade to all current hardware and firmware. Not long after that, this issue started. I worked with Garrett and Jason of MG support for a couple of months. I replaced the Z motor twice, the controller board, firmware, wiring harness, and tested power supply voltages. If I disable motors, the bed drops like a rock. I also removed the drive screw and the bearings glide very smooth. I finally gave up and put it in the closet and bought an M3 ID. I have now brought it back out and am trying to get it to once again print reliably.
Jason indicated to me that the motor is marginal and if it meets any resistance, it cuts power. He says it has always been that way, but I swear that in the early days if it came up against resistance it would sit there and hammer like it does in X or Y and Z in the down direction. Does anyone else remember it that way or am I wrong. I wish I could disable this "feature". I would rather risk breaking something than keep fighting it.
I also tried slowing down the max Z speed. I can't think of anything else to try.
Are there any new developments with this issue? Any input would be much appreciated.
Jason indicated to me that the motor is marginal and if it meets any resistance, it cuts power. He says it has always been that way, but I swear that in the early days if it came up against resistance it would sit there and hammer like it does in X or Y and Z in the down direction. Does anyone else remember it that way or am I wrong. I wish I could disable this "feature". I would rather risk breaking something than keep fighting it.
I also tried slowing down the max Z speed. I can't think of anything else to try.
Are there any new developments with this issue? Any input would be much appreciated.