Zesty Nimble Direct Drive extruder launched on KS
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Back to the Nimble, just to let you know we posted an update.
One that is very relevant to this forum. Here is a snippet:We feel a need to celebrate the fact that we've now hit 100 backers.
We have been developing and testing several further improvement to the Nimble since before the campaign started, We are trying to figure out which of these to share with now. Should it be about weight, the breach system update or something else. Hard to choose.Let's pick something else. We are developing add on's for the Nimble. The first one to come is probably a filament sensor which is under development together with David Crocker. You will be able to clip it onto the Nimble and it will tell you when the filament stops moving, either because of a break, jam or you simply ran out of filament. This is NOT a stretch goal as it will not be ready in time, but we are trying to get there as fast as we can. We think it is a nice addition to the Nimble, and hope you agree.
Nice, yes?
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Hi the filament sensor will it be a simple run-out sensor or a means of measuring filament fed?
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Hi the filament sensor will it be a simple run-out sensor or a means of measuring filament fed?
We're expecting to implement both
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Hi all,
We've just made a significant announcement, something we've been working on since before the campaign launched. An improved breech system, you can change filament over with one hand, and the Nimble now 15% lighter!
https://www.kickstarter.com/projects/lykle/super-light-and-easy-to-use-extruder-for-your-3d-p/posts/1719422Videos of the key change can be found at:
https://www.kickstarter.com/projects/lykle/super-light-and-easy-to-use-extruder-for-your-3d-p/posts/1723021Cheers
Brian -
We were invited on to the Crowdfunding Cast podcast, feel free to have a listen:
http://crowdfundingcast.tk/crowdfunding-cast-episode-477-zesty-nimble/Also, if any of you live in Melbourne Australia, I'll be demoing the Nimble live on Monday at CCHS:
https://www.meetup.com/Connected-Community-HackerSpace-Melbourne/events/235318771/ -
I signed up to KS just to back this project, even though I don't yet have a 3D printer of any sort. I'm planning on building a large Delta based on the Hexagon V2 (http://wiki.fablab-karlsruhe.de/doku.php?id=projekte:hexagon_v2), but made with 2060 extrusions for extra beefiness & expansion options, a circular bed (not square), and with the DuetWiFi for the brains.
I would've loved to be able to pledge for 3 Nimbles so that I can then get a Diamond Hotend built in from the start, but sadly am currently only able to set aside enough for one and hope that the KS meets it's goal so that I can get the other two once I can afford it.
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Retraction hell Nimble test print (Passed!): https://www.reddit.com/r/3Dprinting/comments/5crmyy/retraction_hell_test_print_pass/
Youtube video for most of the print will be getting uploaded as soon as possible.
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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?
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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.
