You could check your heatbed as recently discussed here.
The firmware nozzle PID-settings might deviate too much, nozzle PID-tuning might fix that problem. In order to tune the right extruder the parameter E1 instead of E0 has to be used.
You could check your heatbed as recently discussed here.
The firmware nozzle PID-settings might deviate too much, nozzle PID-tuning might fix that problem. In order to tune the right extruder the parameter E1 instead of E0 has to be used.