Update: I just circumvented the driver entirely. I bought a pololu A4988 board and reconfigured Z-step to the bed heater pin and connected that and the Z-dir pin to a separate board. It works alright, but it required a shielded cable to keep the motors from stepping randomly during a print. I now have a separate bed heater and z-stepper rather than it being all together in one unit, but it does wby malachik - Firmware - Marlin
Thanks, I re-did my trim pots to about what you recommended just to be sure. The video was helpful, but ultimately not really what I'm looking for. Although, it was useful for showing how I might be able to replace my stepper driver without replacing the entire board - which, to be honest, might be what I end up doing.by malachik - Firmware - Marlin
I currently have those lines commented since it defaults to A4988 anyway, and I've tried uncommenting it before, although it had no effect as far as I could tell. And yes, the Z-axis motors are connected in parallel to a single A4982, whereas each of the other motors have their own driver. I don't think that has anything to do with the problem, though, since it behaved the same when I connected iby malachik - Firmware - Marlin
I'm using a Melzi, so the drivers and controller are all on the same board, and as far as I can tell the only way to adjust the stepper drivers on the hardware side is a reference voltage trim pot. Is there something I'm missing? I assumed the problem was all software, but I might be completely wrong.by malachik - Firmware - Marlin
Hello all, I'm setting up a replacement Melzi 2.0 board from TRONXY for my i3 clone, which - according to the RepRap wiki - has A4982 drivers for all the steppers. I'm attempting to configure Marlin 2.0.x for this printer and this is the last big problem I'm encountering. The problem: My X, Y, and extruder steppers move just fine, but the Z axis (2 motors, 2 4-pin plugs on the board) doesn't mby malachik - Firmware - Marlin
I commented out //#define BTN_EN1 10 //#define BTN_EN2 11 and it works!! I can't believe I didn't see that earlier, thank you so much!by malachik - Firmware - Marlin
Hello all, First of all, I apologize if this isn't the right place to post about this issue; I'm new to these forums. I'm using a Melzi 2.0 board from TRONXY on a Prusa i3 clone (Monoprice Maker Select v2). The firmware is just Marlin 2.0.x configured to my printer, where I have "ZONESTAR_LCD" selected as the character LCD. The problem I'm experiencing is with my 2004 keypad LCD (aka Zonestby malachik - Firmware - Marlin