That is exactly the issue! The board came with A4988 chips, but the new one is a DRV8825. After reading some more last night, I realized I need to switch some of the jumpers to make it work. Thanks so much for the confirmation!by drewby07 - Sanguino(lolu)
Last week I managed to fry one of my pololus (y axis) by shorting it out with a screwdriver. I ordered a generic stepstick driver to replace it. After installing it today and adjusting the current I am having a strange issue. Prints are compressed along the y axis. I printed a circular part, and it came out as an oval, compressed along y. Do I need to adjust something? I thought about the jby drewby07 - Sanguino(lolu)
So I was trying to dial in my pololus this morning, and I managed to touch the screwdriver to something I shouldn't have. There were sparks. Now my Y axis motor will only vibrate loudly when it should be traveling. I have tried adjusting the pot all the way down til the motor doesn't move at all, then slowly increasing it. Once it starts moving, it just vibrates....never actually moving theby drewby07 - Sanguino(lolu)
New development - Today I removed the heated bed and discovered that my nozzle had pushed the PCB down and pinched one of the thermistor leads against a screw. Apparently this also had the effect of shorting the thermistor to the heated bed PCB. I've replaced the thermistor, insulated the scratched PCB trace with kapton and reconnected everything. Now my Z axis is moving, my heaters arby drewby07 - General Mendel Topics
Prusa Mendel i2 Sanguinololu board with pololu steppers This morning I was starting a bed-level before printing. Heated bed and extruder were both heating up. Suddenly the printer stopped mid-move. I noticed the black negative wire from my power supply to the Sanguinololu had come loose from it's terminal screw. After reconnecting the wire, the printer has been acting strange. First, I coby drewby07 - General Mendel Topics