OK, it is a bit more complicated:
Slic3r uses retract_speed from both retract and also for reversing of the retract (which was done before).
For normal printing moves:
* retract_speed is not used at all,
* the speed of filament feeding is determined by filament diameter, print move speed in XY plane and E-stepsPerMm.
If you have your extruder e-steps correctly calibrated as advised by richRap and filament diameter correctly set, then your extrusion speed must be just right for your printing speed, layer height, and extrusion width.
Well that is if you do not mess with extrusion_multiplier which is kind of an option to never use anyway (it should be always 1).
In case of a correctly calibrated extruder it either gives just the right amount of filament at the right speed or you can hear your stepper skipping or pulley is grinding the filament.
First make sure you have extruder correctly calibrated (E-steps). Only then try to print anything.
Edit: spelling.
Slic3r uses retract_speed from both retract and also for reversing of the retract (which was done before).
For normal printing moves:
* retract_speed is not used at all,
* the speed of filament feeding is determined by filament diameter, print move speed in XY plane and E-stepsPerMm.
If you have your extruder e-steps correctly calibrated as advised by richRap and filament diameter correctly set, then your extrusion speed must be just right for your printing speed, layer height, and extrusion width.
Well that is if you do not mess with extrusion_multiplier which is kind of an option to never use anyway (it should be always 1).
In case of a correctly calibrated extruder it either gives just the right amount of filament at the right speed or you can hear your stepper skipping or pulley is grinding the filament.
First make sure you have extruder correctly calibrated (E-steps). Only then try to print anything.
Edit: spelling.