Happened to me as well when the J-head clogged.
I just flipped the clamp upside down. Then calibrated the extruder, the step/mm values were about 50% off in the firmware from 3DPrinterczar.
See also if the thermistor sits in the heater block. Mine got loose and overheating caused the clamp to deform.
After all that I used about 1/2 kg of PLA with no problem.
I just flipped the clamp upside down. Then calibrated the extruder, the step/mm values were about 50% off in the firmware from 3DPrinterczar.
See also if the thermistor sits in the heater block. Mine got loose and overheating caused the clamp to deform.
After all that I used about 1/2 kg of PLA with no problem.