Having too much torque on the extruder stepper motor can be a problem. The reason is that when the nozzle becomes temporarily obstructed, you want the drive motor to skip, rather than the extruder to chew up the filament. That way, when the obstruction is removed, extrusion continues. You can reduce the torque by reducing current. Unfortunately, if you do that with a long motor that has a lot of rotor inertia, then you have to reduce the acceleration, because the reduced torque can't accelerate the rotor so fast.
I had this problem using the motor you linked to in a 5:1 geared extruder.
Have you considered this one: [www.omc-stepperonline.com] ? It's listed on their main site but not on their EU site.
I had this problem using the motor you linked to in a 5:1 geared extruder.
Have you considered this one: [www.omc-stepperonline.com] ? It's listed on their main site but not on their EU site.