Hi guys,
this is my very first post here and I really hope you'll be able to help me.
I had my Prusa Mendel up and running on a Sanguinololu with Sprinter firmware for quite some time now without any mentionable problems. For a research project I am now in need of an additional stepper Motor and a servo.Therefore I wanted to change the electronics to RAMPS 1.4. I got the following equipment:
- SainSmart Mega2560 AVR ATmega2560 ATMEGA8U2
- RAMPS 1.4 board
- ATX power supply
- 5x Stepstick A4988
- 5x Nema 17 stepper motors
- Modelcraft MC-410 servo (Not important for now)
As the printer was running before, I already knew the required steps/mm (80.8,80.8,2560,920), but when I'm moving the axis with a host program the driven distance ist about 15 times higher than commanded. The z-axis won't move at all (it's just making high pitched noises). I had the same results for Spinter, Marlin and Repetier firmware. Switching back to Sanguino made it fine again.
Also when commanded to home the x,y-axis, the motors do nothing but squeek. Turning the potentiometers didn't help. Also the drivers seem to be ok, as the drivers from the Sanguino board showed the same effect, when put onto the RAMPS board.
Adjusting the steps/mm will not work either. Could it have something to do with micro stepping or any setting like that? Also I was wondering: I had to set the baudrate to 115200 instead of 250000 because of connetion issues with the host software. I don't know if that makes any difference.
I'm really out of ideas and working towards a deadline here, so I would really appreciate any suggestions.
this is my very first post here and I really hope you'll be able to help me.
I had my Prusa Mendel up and running on a Sanguinololu with Sprinter firmware for quite some time now without any mentionable problems. For a research project I am now in need of an additional stepper Motor and a servo.Therefore I wanted to change the electronics to RAMPS 1.4. I got the following equipment:
- SainSmart Mega2560 AVR ATmega2560 ATMEGA8U2
- RAMPS 1.4 board
- ATX power supply
- 5x Stepstick A4988
- 5x Nema 17 stepper motors
- Modelcraft MC-410 servo (Not important for now)
As the printer was running before, I already knew the required steps/mm (80.8,80.8,2560,920), but when I'm moving the axis with a host program the driven distance ist about 15 times higher than commanded. The z-axis won't move at all (it's just making high pitched noises). I had the same results for Spinter, Marlin and Repetier firmware. Switching back to Sanguino made it fine again.
Also when commanded to home the x,y-axis, the motors do nothing but squeek. Turning the potentiometers didn't help. Also the drivers seem to be ok, as the drivers from the Sanguino board showed the same effect, when put onto the RAMPS board.
Adjusting the steps/mm will not work either. Could it have something to do with micro stepping or any setting like that? Also I was wondering: I had to set the baudrate to 115200 instead of 250000 because of connetion issues with the host software. I don't know if that makes any difference.
I'm really out of ideas and working towards a deadline here, so I would really appreciate any suggestions.