Zesty Nimble Direct Drive extruder launched on KS
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Here is the video
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So talking of retraction what speed retraction can you achieve? And what motor/current setting is this. I know it took a fair amount of trial and error with my flex3drive to achieve a balance between fast enough retraction and motor current. What is your overall gear ratio between drive gear shaft and the motor?
The ratio is listed on our KS campaign, it's 30:1
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.
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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.
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@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 sameI 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.
