Hello all. I am trying to build the Mendel Prusa and I just started the wiring things up. My issue is that when I press extrude in pronterface the motors buzz rather than spin.
Here is my basic setup. I am using an Iduino Mega board with Sprinter firmware and a RAMPS shield. I have A4988 drivers and Nema 17 steppers, Minibea 17PM-K307-05VS, with 6 Pins.
I only have one motor and driver connected. The motors are wired to the drivers as follows, stepper pins 1346 to drivers pins 1234. I tested the resistances to find the pairs with the higher resistance. I have the driver plugged into the 1st extruder socket. I have tried setting the Voltage across the driver's potentiometer from 0.4-0.8V. My power source is rated 350W and in getting a voltage reading of 12.7V.
Does anyone have any ideas why the motors are not working correctly?
Here is my basic setup. I am using an Iduino Mega board with Sprinter firmware and a RAMPS shield. I have A4988 drivers and Nema 17 steppers, Minibea 17PM-K307-05VS, with 6 Pins.
I only have one motor and driver connected. The motors are wired to the drivers as follows, stepper pins 1346 to drivers pins 1234. I tested the resistances to find the pairs with the higher resistance. I have the driver plugged into the 1st extruder socket. I have tried setting the Voltage across the driver's potentiometer from 0.4-0.8V. My power source is rated 350W and in getting a voltage reading of 12.7V.
Does anyone have any ideas why the motors are not working correctly?