In general those 0.9° steppers like to run on higher voltages. The description on E3d page state it's a 2.7V motor, so it should run on 12V too.
How did you try to extrude? Using the buttons of the control panel or sending gcode with a propper speed declaration?
I always send " G1 F100 E10" so I know it's fully under control.
I guess, the control buttons use the max. extrusion speed, which is often way to high ( works for retract/unretract but not for extrusion )
PS: It's funny they don't specify max. current?
How did you try to extrude? Using the buttons of the control panel or sending gcode with a propper speed declaration?
I always send " G1 F100 E10" so I know it's fully under control.
I guess, the control buttons use the max. extrusion speed, which is often way to high ( works for retract/unretract but not for extrusion )
PS: It's funny they don't specify max. current?