Hi, I have a strange issue with my z stepper (not moving under certain condition). I'm currently calibrating my axis using pronterface with sprinter firmware. I calibrated x and y and changed their axis_step_per_unit values without any issues, but when I do the same for z, it just doesn't work. The original axis_step_per_unit value for z is like 3200/1.25, with this value, z moves fine in both directions, but that only gives me about 50% of the distance that I instructed it to move, so I did some calculation and changed the value to about 4980, once I did that and recompiled/reload the firmware, z would not move, it just gives a loud noise in either directions. What am I doing wrong? I've tried changing the wiper on the z driver after reading some posts here, but that didn't do anything. As soon as I lower the value to less than 4100, the motor would work again, so I can't calibrate my z. Any suggestions? https://reprap.org/forum/read.php?158,125941,125941#msg-125941 Wed, 17 Jun 2026 16:12:40 -0400 Phorum 5.2.23 https://reprap.org/forum/read.php?158,125941,126177#msg-126177 https://reprap.org/forum/read.php?158,125941,126177#msg-126177 scanboy Sanguino(lolu) Tue, 27 Mar 2012 16:13:38 -0400 https://reprap.org/forum/read.php?158,125941,126167#msg-126167 https://reprap.org/forum/read.php?158,125941,126167#msg-126167 egenoup Sanguino(lolu) Tue, 27 Mar 2012 15:16:27 -0400 https://reprap.org/forum/read.php?158,125941,126120#msg-126120 https://reprap.org/forum/read.php?158,125941,126120#msg-126120 scanboy Sanguino(lolu) Tue, 27 Mar 2012 09:12:43 -0400 https://reprap.org/forum/read.php?158,125941,125960#msg-125960 https://reprap.org/forum/read.php?158,125941,125960#msg-125960 scanboy Sanguino(lolu) Mon, 26 Mar 2012 11:27:21 -0400 https://reprap.org/forum/read.php?158,125941,125942#msg-125942 https://reprap.org/forum/read.php?158,125941,125942#msg-125942
Try to reduce acceleration (in firmware).]]> DeuxVis Sanguino(lolu) Mon, 26 Mar 2012 09:53:53 -0400 https://reprap.org/forum/read.php?158,125941,125941#msg-125941 https://reprap.org/forum/read.php?158,125941,125941#msg-125941
I have a strange issue with my z stepper (not moving under certain condition). I'm currently calibrating my axis using pronterface with sprinter firmware. I calibrated x and y and changed their axis_step_per_unit values without any issues, but when I do the same for z, it just doesn't work. The original axis_step_per_unit value for z is like 3200/1.25, with this value, z moves fine in both directions, but that only gives me about 50% of the distance that I instructed it to move, so I did some calculation and changed the value to about 4980, once I did that and recompiled/reload the firmware, z would not move, it just gives a loud noise in either directions. What am I doing wrong? I've tried changing the wiper on the z driver after reading some posts here, but that didn't do anything. As soon as I lower the value to less than 4100, the motor would work again, so I can't calibrate my z. Any suggestions?]]> scanboy Sanguino(lolu) Mon, 26 Mar 2012 09:50:20 -0400