@dc42 thanks for the clarification David.
@DjDemonD given we're only seeing the need for 1mm or less retractions then what I said still stands I believe.
These are the settings I have in firmware at the moment:
[[language]]
M201 X1000 Y1000 Z1000 E1000 ; Accelerations (mm/s^2) Set all E-motors the same
M203 X10000 Y10000 Z10000 E3600 ; Maximum speeds (mm/min) Set all E-motors the same
M566 X1200 Y1200 Z1200 E1200 ; Maximum instant speed changes mm/minute. Set all E-motors the same
@dc42:
@briangilbert:
I also spoke with David Crocker about extrusion and retraction speeds he suggested that more than 5mm/sec is largely pointless (which is confusing give the web interface defaults), though I have run at up to 10mm/sec as well.
I made that remark in the context of using 1 to 2mm retraction, because I thought that with such a small amount of retraction there isn't sufficient accelerate/decelerate distance to reach high speeds. However, I've now done the sums and if the extruder acceleration is 1000mm/sec^2 then it turns it that with 2mm retraction you can reach 45mm/sec. I don't know whether higher speeds help or not when using small amounts of retraction in a direct drive extruder, because I don't have one.
If you use a conventional extruder with a long Bowden tube and much longer retraction distances, then higher retraction speeds are certainly worthwhile.
