Extruder Stripping Filament (1 reply)

Hi,

I'm currently trying to calibrate my extruder - but it doesn't seem to be grasping the filament correctly.

As I understand it, I'm using a wades geared extruder & a J Head nozzle print head.

I've attached some photos of how it looks but to explain, it does extrude filament but very slowly, and it gets stuck / the motor starts to vibrate.

I'm using:

Pronterface
PLA 1.75
Hot end temp setting 190 deg c

I've tried setting up the extruder steps using the (# of steps) * expected distance / actual distance ... this worked for XYZ but not for E.
i've also tried to increase the POT, but don't want to go any further as the motor is already jamming so don't want to burn it out.

Does anybody know what the problem is likely to be?

photos:

[postimg.org]
[postimg.org]


Thanks