New delta drive Thews made a new extruder drive last week. I've been testing it and it works great! rHHzDvr.jpg mod_embed_images_loadimage('391ed3998bae356815c84059b157d7e7', '/forum/thumbcache/b46/f6f/10c/6b9/72b/66b/a94/29c/a73/a66/ad_800x400.png', 'https://i.imgur.com/rHHzDvr.jpg', 'https://reprap.org/forum/addon.php?178,module=embed_images,check_scaling=1,url=https%3A%2F%2Fi.imgur.com%2FrHHzDvr.jpg', '', 671950, 800, 400, 'Loading image ...', false); hW1A0N7.jpg mod_embed_images_loadimage('7a221465c17552ffe100cb405a50f1cb', '/forum/thumbcache/f79/249/a2b/79d/d3f/e53/d44/421/3e9/9cc/f9_800x400.png', 'https://i.imgur.com/hW1A0N7.jpg', 'https://reprap.org/forum/addon.php?178,module=embed_images,check_scaling=1,url=https%3A%2F%2Fi.imgur.com%2FhW1A0N7.jpg', '', 671950, 800, 400, 'Loading image ...', false); 3Db4E4j.jpg mod_embed_images_loadimage('43cad0f9f6307a6a9ca5bd355ab97f3f', '/forum/thumbcache/873/ee3/8d3/bbd/0c4/35f/eb6/153/c21/91c/76_800x400.png', 'https://i.imgur.com/3Db4E4j.jpg', 'https://reprap.org/forum/addon.php?178,module=embed_images,check_scaling=1,url=https%3A%2F%2Fi.imgur.com%2F3Db4E4j.jpg', '', 671950, 800, 400, 'Loading image ...', false); Best part about this drive is the quick release setup and being able to clean ground filament off the spur drive without having to disassemble anything. The whole idea of suspending the extruder like that is to reduce the length of the bowden tube. Like this I only need 2.1mm retracts and I don't get any blobbing or stringing anymore. The stepper motor is a Nema11 with a 27:1 ratio gearbox on it. Can be bought here or from many other places: [www.omc-stepperonline.com] STL files are attached but its on thingiverse too: [www.thingiverse.com] https://reprap.org/forum/read.php?178,671950,671950#msg-671950 Wed, 09 Sep 2026 11:55:25 -0400 Phorum 5.2.23 https://reprap.org/forum/read.php?178,671950,699477#msg-699477 Re: New delta drive https://reprap.org/forum/read.php?178,671950,699477#msg-699477 TTN Delta Machines Thu, 11 Aug 2016 16:32:09 -0400 https://reprap.org/forum/read.php?178,671950,699375#msg-699375 Re: New delta drive https://reprap.org/forum/read.php?178,671950,699375#msg-699375 [attachment 82498 gearknob.jpg]
A part I recently printed for someone with 150 micron layers until the top section with 100micron layers.]]> DjDemonD Delta Machines Thu, 11 Aug 2016 09:28:44 -0400 https://reprap.org/forum/read.php?178,671950,693926#msg-693926 Re: New delta drive https://reprap.org/forum/read.php?178,671950,693926#msg-693926 If you can get the torque, why not use it. The point of the nema11 was to reduce weight, while still being able to do the extruding functions.

He's made a newer fully parametric version of the filament drive: [cad.onshape.com]
Since I run 3mm filament I had to resize some parts and thicken them.]]> TTN Delta Machines Tue, 02 Aug 2016 22:00:28 -0400 https://reprap.org/forum/read.php?178,671950,693924#msg-693924 Re: New delta drive https://reprap.org/forum/read.php?178,671950,693924#msg-693924
Who/what is 'Thews'? Something to do with thews-wo_ ?

I'm curious about the thinking behind a NEMA11 + 27:1 gearbox... they're quite pricey. Why not (say) a NEMA17 or NEMA14 pancake motor? Is it that you can't get the torque for the low weight?

According to the website, the holding torque = 1.3Nm (cf 0.43Nm for a 48mm NEMA17 direct drive).]]> frankvdh Delta Machines Tue, 02 Aug 2016 21:44:02 -0400 https://reprap.org/forum/read.php?178,671950,693763#msg-693763 Re: New delta drive https://reprap.org/forum/read.php?178,671950,693763#msg-693763
What is the total weight of the extruder?]]> Lykle Delta Machines Tue, 02 Aug 2016 07:39:20 -0400 https://reprap.org/forum/read.php?178,671950,672188#msg-672188 Re: New delta drive https://reprap.org/forum/read.php?178,671950,672188#msg-672188 TTN Delta Machines Tue, 07 Jun 2016 23:06:52 -0400 https://reprap.org/forum/read.php?178,671950,672187#msg-672187 Re: New delta drive https://reprap.org/forum/read.php?178,671950,672187#msg-672187
Couldn't you shorten that Bowden tube further? Not sure how long your arms are but there seems like plenty of leeway to suspend the extruder lower down.

Very tempted to print one and try.

I'm down to 1.2mm retracts on my set up with a 200mm Bowden tube from the flying extruder on 674mm long arms]]> aussiephil Delta Machines Tue, 07 Jun 2016 22:58:44 -0400 https://reprap.org/forum/read.php?178,671950,672105#msg-672105 Re: New delta drive https://reprap.org/forum/read.php?178,671950,672105#msg-672105
Quote
DC42
What retraction speed and acceleration are you able to achieve?

I had to set microstepping to 2x to be able to get fast enough retracts on my RAMPS 1.4. I was able to go up to 20mm/s but use 10mm/s because 20mm/s retracts weren't always reliable.
The 3mm filament I use is really stiff so if you run thinner filament I'm sure you could use a higher speed. It works beautifully! I'm retracting 2.1mm and coasting 0.3mm before doing retracts.

Quote
BuildAThing
With a nema 11 motor and the 27 to 1 box would your torque be about 36 Nm? Do you think that is enough for longer bowden tubes?
It has loads of torque, easily enough torque for a longer bowden tube.]]> TTN Delta Machines Tue, 07 Jun 2016 16:19:35 -0400 https://reprap.org/forum/read.php?178,671950,672006#msg-672006 Re: New delta drive https://reprap.org/forum/read.php?178,671950,672006#msg-672006
This started off with the insane volumetric rate before I dropped it down. That's at 2mm width I think.

no retraction issues with normal printing

]]> thews Delta Machines Tue, 07 Jun 2016 11:45:50 -0400 https://reprap.org/forum/read.php?178,671950,671997#msg-671997 Re: New delta drive https://reprap.org/forum/read.php?178,671950,671997#msg-671997
Quote
dc42
27:1 gearing is very high. What retraction speed and acceleration are you able to achieve? Although I guess that with a short Bowden tube on a flying extruder, fast retraction is less important.
I have both the 5:1 version of that motor and the 27:1. Either fit my extruder which is direct. I did not find the 27:1 to be any improvement, if anything it was slightly worse.]]> Koko76 Delta Machines Tue, 07 Jun 2016 11:25:03 -0400 https://reprap.org/forum/read.php?178,671950,671995#msg-671995 Re: New delta drive https://reprap.org/forum/read.php?178,671950,671995#msg-671995 dc42 Delta Machines Tue, 07 Jun 2016 11:11:57 -0400 https://reprap.org/forum/read.php?178,671950,671977#msg-671977 Re: New delta drive https://reprap.org/forum/read.php?178,671950,671977#msg-671977
Awesome, simple, clean design!]]> BuildAThing Delta Machines Tue, 07 Jun 2016 10:20:46 -0400 https://reprap.org/forum/read.php?178,671950,671950#msg-671950 New delta drive https://reprap.org/forum/read.php?178,671950,671950#msg-671950






Best part about this drive is the quick release setup and being able to clean ground filament off the spur drive without having to disassemble anything.

The whole idea of suspending the extruder like that is to reduce the length of the bowden tube. Like this I only need 2.1mm retracts and I don't get any blobbing or stringing anymore.


The stepper motor is a Nema11 with a 27:1 ratio gearbox on it. Can be bought here or from many other places: [www.omc-stepperonline.com]

STL files are attached but its on thingiverse too: [www.thingiverse.com]
]]> TTN Delta Machines Tue, 07 Jun 2016 08:40:54 -0400