Howdy folks! Just finished setting up this i3 with my neighbor. The board is acting...strange. With 12v verified to the board, you get zero status lights/behavior. No LCD, no nuthin'. If you plug in the USB side (to PC), the LCD will come alive and you will get status lights on the board itself. You can navigate through the options menu on the LCD, and you can connect to the unit (Repitier) and see indicator lights flash when you toggle settings. However, the steppers fail to move. Any of them. From either software or LCD, same behavior. Voltage on the drivers all show ~0.8v. Tested the actual stepper motors on my mega+ramps from other printer, and they move just fine. Also tested another set of NEMA motors on the MKS board just for grins, no joy. Very weird issue. I first suspected garbage firmware, but the whole no-lights-on-12v makes me second guess it. Thoughts? https://reprap.org/forum/read.php?4,621002,621002#msg-621002 Fri, 13 Mar 2026 04:04:47 -0400 Phorum 5.2.23 https://reprap.org/forum/read.php?4,621002,621820#msg-621820 https://reprap.org/forum/read.php?4,621002,621820#msg-621820
Open to ideas, going to RMA thee board anyway so I have time to tinker :)]]> ncshooter426 Reprappers Fri, 05 Feb 2016 08:09:10 -0500 https://reprap.org/forum/read.php?4,621002,621665#msg-621665 https://reprap.org/forum/read.php?4,621002,621665#msg-621665
The MKS Gen is a great card. Probably one of the best Atmega 2560 money can buy.
Don't be that quick to bash it. Maybe the issue don't come from the board. ;)
Of course there's electronic automatic fuses, hold on the reset button for a couple of seconds to unlock them.

Did you read my link ?

++JM]]> J-Max Reprappers Fri, 05 Feb 2016 03:17:56 -0500 https://reprap.org/forum/read.php?4,621002,621373#msg-621373 https://reprap.org/forum/read.php?4,621002,621373#msg-621373 ncshooter426 Reprappers Thu, 04 Feb 2016 14:00:21 -0500 https://reprap.org/forum/read.php?4,621002,621284#msg-621284 https://reprap.org/forum/read.php?4,621002,621284#msg-621284 forums.reprap.org] ;)]]> J-Max Reprappers Thu, 04 Feb 2016 11:08:58 -0500 https://reprap.org/forum/read.php?4,621002,621230#msg-621230 https://reprap.org/forum/read.php?4,621002,621230#msg-621230
I suspect that 12v for the motor side isn't making it to the steppers. I tested the drivers last night, but only tested the one side (logic side) but completely derped out and didn't test the motor side. Either way... I think this board is shot.]]> ncshooter426 Reprappers Thu, 04 Feb 2016 09:47:03 -0500 https://reprap.org/forum/read.php?4,621002,621002#msg-621002 https://reprap.org/forum/read.php?4,621002,621002#msg-621002
Just finished setting up this i3 with my neighbor. The board is acting...strange.

With 12v verified to the board, you get zero status lights/behavior. No LCD, no nuthin'. If you plug in the USB side (to PC), the LCD will come alive and you will get status lights on the board itself. You can navigate through the options menu on the LCD, and you can connect to the unit (Repitier) and see indicator lights flash when you toggle settings.

However, the steppers fail to move. Any of them. From either software or LCD, same behavior. Voltage on the drivers all show ~0.8v.

Tested the actual stepper motors on my mega+ramps from other printer, and they move just fine. Also tested another set of NEMA motors on the MKS board just for grins, no joy.

Very weird issue. I first suspected garbage firmware, but the whole no-lights-on-12v makes me second guess it.

Thoughts?]]> ncshooter426 Reprappers Wed, 03 Feb 2016 22:29:21 -0500