Hi all, I think I am missing something simple here, I hope someone can help. I have put together a Bear Prusa clone, kinda. Anyway, I printed some parts and assembled it mostly like a Bear. It is using Ramps 1.4 and Drv8825 drivers. My issue is that the Y motor has some clunkiness sometimes, then the printer errors and has to reset. If I home the printer, sometimes it stops fine, then starts ticking about every second for a minute or two before needing to reset. I have run it without the y belt and get the same symptoms. I have swapped driver boards, both Drv8825 and the A4988. I have swapped stepper motors. I have swapped the ramps board. I have not swapped the Mega board. I have isolated the wire to the stepper so no cross talk. I have adjusted the voltage. Changed the step settings from no microstep to 1/32. Set steps per mm to various things to account for weird missed steps. It is only on the y. The heat sink gets hot and the motor whines. I don't know what I am missing. Thanks Scot https://reprap.org/forum/read.php?160,896351,896351#msg-896351 Sun, 19 Apr 2026 17:32:40 -0400 Phorum 5.2.23 https://reprap.org/forum/read.php?160,896351,896399#msg-896399 https://reprap.org/forum/read.php?160,896351,896399#msg-896399
It turned out that the Mega board was the problem. Once I swapped out the arduino clone, it started functioning correctly.
Thanks for all the views. Is there a way to close this post?
Scot]]> Progr3ss Stepper Motors, Servo Motors, DC Motors Wed, 08 Jan 2025 16:14:43 -0500 https://reprap.org/forum/read.php?160,896351,896357#msg-896357 https://reprap.org/forum/read.php?160,896351,896357#msg-896357 VDX Stepper Motors, Servo Motors, DC Motors Wed, 01 Jan 2025 12:22:14 -0500 https://reprap.org/forum/read.php?160,896351,896351#msg-896351 https://reprap.org/forum/read.php?160,896351,896351#msg-896351 I think I am missing something simple here, I hope someone can help.

I have put together a Bear Prusa clone, kinda. Anyway, I printed some parts and assembled it mostly like a Bear. It is using Ramps 1.4 and Drv8825 drivers.

My issue is that the Y motor has some clunkiness sometimes, then the printer errors and has to reset. If I home the printer, sometimes it stops fine, then starts ticking about every second for a minute or two before needing to reset.

I have run it without the y belt and get the same symptoms.

I have swapped driver boards, both Drv8825 and the A4988. I have swapped stepper motors. I have swapped the ramps board. I have not swapped the Mega board. I have isolated the wire to the stepper so no cross talk.
I have adjusted the voltage. Changed the step settings from no microstep to 1/32. Set steps per mm to various things to account for weird missed steps.

It is only on the y. The heat sink gets hot and the motor whines.

I don't know what I am missing.
Thanks Scot]]> Progr3ss Stepper Motors, Servo Motors, DC Motors Tue, 31 Dec 2024 16:13:37 -0500