I have two 1.2 stepper drivers, and when they are plugged into power the LEDs light up, but whenever I plug them into a arduino or sanguino and try to get the motors to turn nothing happens. Does anybody have any idea what's wrong with the drivers? Thanks. https://reprap.org/forum/read.php?13,25714,25714#msg-25714 Mon, 20 Apr 2026 06:26:35 -0400 Phorum 5.2.23 https://reprap.org/forum/read.php?13,25714,27775#msg-27775 https://reprap.org/forum/read.php?13,25714,27775#msg-27775 http://reprap.svn.sourceforge.net/viewvc/reprap/trunk/reprap/firmware/Sanguino/Sanguino3G/testers/imperial_stepper/imperial_stepper.pde

in a Sanguino MotherBoard.

You can also read my blog:
http://mireprap.blogspot.com/2009/09/comprobar-una-placa-stepper-motor.html]]> raulcigil Controllers Mon, 21 Sep 2009 17:57:31 -0400 https://reprap.org/forum/read.php?13,25714,27768#msg-27768 https://reprap.org/forum/read.php?13,25714,27768#msg-27768 Protonite Controllers Mon, 21 Sep 2009 14:45:30 -0400 https://reprap.org/forum/read.php?13,25714,27755#msg-27755 https://reprap.org/forum/read.php?13,25714,27755#msg-27755
-Lars]]> larsrc Controllers Mon, 21 Sep 2009 09:41:51 -0400 https://reprap.org/forum/read.php?13,25714,27749#msg-27749 https://reprap.org/forum/read.php?13,25714,27749#msg-27749
Brew]]> Brew Controllers Sun, 20 Sep 2009 21:54:39 -0400 https://reprap.org/forum/read.php?13,25714,25819#msg-25819 https://reprap.org/forum/read.php?13,25714,25819#msg-25819
Phil]]> philwaud Controllers Mon, 03 Aug 2009 17:05:06 -0400 https://reprap.org/forum/read.php?13,25714,25774#msg-25774 https://reprap.org/forum/read.php?13,25714,25774#msg-25774
1. Replaced the IC L297 between a working and non-working board. Does not help. IC not an issue.
2. Checked the component values, they all are in the range they should be in. (I dont know how to check the caps though).
3. While trying to check the trim-pot using supply ground as reference, I blew out a trace in the PCB, I had to add a wire to fix the connection.
4. I tried re-soldering all the components. No help.

Any idea or direction on how to debug would be helpful. I have 2 boards working fine, only 1 has issue.

Thanks,
Jay]]> jay Controllers Sun, 02 Aug 2009 15:01:15 -0400 https://reprap.org/forum/read.php?13,25714,25732#msg-25732 https://reprap.org/forum/read.php?13,25714,25732#msg-25732 NewPerfection Controllers Fri, 31 Jul 2009 22:51:13 -0400 https://reprap.org/forum/read.php?13,25714,25731#msg-25731 https://reprap.org/forum/read.php?13,25714,25731#msg-25731 here, and I have it set to half step.]]> James Weng Controllers Fri, 31 Jul 2009 21:27:10 -0400 https://reprap.org/forum/read.php?13,25714,25730#msg-25730 https://reprap.org/forum/read.php?13,25714,25730#msg-25730 Wire Wrapped to a BasicX, as I didn't get my Sanguino up and running till quite recently.

Are you using your own code?
If you are you need 3 pins wired, direction, step and ground, just send a bunch of high and low pulses (eg 400 pulses) to turn the motor

Did you select full or half step?
There is a few pads laying idle, just make a solder bridge between the centre pad and an adjacent pad to select the stepping mode]]> Grogyan Controllers Fri, 31 Jul 2009 21:14:59 -0400 https://reprap.org/forum/read.php?13,25714,25714#msg-25714 https://reprap.org/forum/read.php?13,25714,25714#msg-25714 James Weng Controllers Fri, 31 Jul 2009 19:01:54 -0400