Pancake stepper extruder June 08, 2016 09:03AM |
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Re: Pancake stepper extruder June 08, 2016 10:36AM |
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Re: Pancake stepper extruder June 08, 2016 11:30AM |
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Re: Pancake stepper extruder June 08, 2016 12:06PM |
Registered: 14 years ago Posts: 268 |
I run a NEMA11 with a 5:1 gearbox [www.omc-stepperonline.com], it has done 1.75mm filament just fine. Coming up I have some of the Sanyo 11.6mm NEMA17's (70g each) that I'm going to run with 4:1 gearing as they have greater torque out of the box than the 11. I don't expect any issue.Quote
Origamib
What's the smallest motor possible for an extruder?
Looking at the E3D titan, some people are claiming 18Ncm nema 17 motors, which weigh around 140g. Would this provide enough push on a 1.75mm filament? I'm dubious that this will do it, but my only experience is with my direct drive extruder, running a pretty beefy 59ncm motor. I'm pretty sure this is too much, but I've not had any problems so far apart from the weight.
Anyone had any experience with running these small pancake steppers on an E3D titan?
Re: Pancake stepper extruder June 08, 2016 12:21PM |
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Re: Pancake stepper extruder June 08, 2016 01:05PM |
Registered: 9 years ago Posts: 601 |
Quote
Koko76
I run a NEMA11 with a 5:1 gearbox [www.omc-stepperonline.com], it has done 1.75mm filament just fine. Coming up I have some of the Sanyo 11.6mm NEMA17's (70g each) that I'm going to run with 4:1 gearing as they have greater torque out of the box than the 11. I don't expect any issue.Quote
Origamib
What's the smallest motor possible for an extruder?
Looking at the E3D titan, some people are claiming 18Ncm nema 17 motors, which weigh around 140g. Would this provide enough push on a 1.75mm filament? I'm dubious that this will do it, but my only experience is with my direct drive extruder, running a pretty beefy 59ncm motor. I'm pretty sure this is too much, but I've not had any problems so far apart from the weight.
Anyone had any experience with running these small pancake steppers on an E3D titan?
-edit to clarify, I don't run the geared stepper into the titan, but the results are still relevant
Re: Pancake stepper extruder June 08, 2016 01:27PM |
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Re: Pancake stepper extruder June 09, 2016 06:12AM |
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Re: Pancake stepper extruder June 09, 2016 02:51PM |
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Re: Pancake stepper extruder June 09, 2016 03:29PM |
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Re: Pancake stepper extruder June 09, 2016 05:38PM |
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Re: Pancake stepper extruder June 09, 2016 05:40PM |
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Re: Pancake stepper extruder June 09, 2016 06:25PM |
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The OMC Stepperonline motor I linked above has 6Ncm of torque listed, and I've run it for some time now at 5:1 with no issues, that would be roughly half of what you are saying. I do use 1.75mm filament and I don't print crazy fast. I'm also using a .3 nozzle. Not trying to say you are wrong in your assessment, but this setup has given me some great prints.Quote
dc42
In my experience, you need about 3:1 gearing to get enough extrusion force using a 20Ncm motor and a RepRapPro hobbed insert; or to put it another way, with a standard 1.8deg motor the product of full steps/mm and torque in Ncm should be more than 500. From this you can work out what gearing you need for less powerful motors.
Re: Pancake stepper extruder June 10, 2016 08:19AM |
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Re: Pancake stepper extruder June 10, 2016 09:30AM |
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Re: Pancake stepper extruder June 10, 2016 09:55AM |
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Re: Pancake stepper extruder June 10, 2016 10:16AM |
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Re: Pancake stepper extruder June 10, 2016 10:33AM |
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Re: Pancake stepper extruder June 10, 2016 01:09PM |
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Koko76
Ok, so I have approximately 600 steps per mm, 16 micro steps. That's 37.5x6Ncm or 225 by your formula. I have done many 10+ hour prints with abs and pla of a variety of manufacturers/temps etc. I would characterize it as reliable. I'm trying to understand why you need or want more than 2 times that number.
Re: Pancake stepper extruder June 10, 2016 01:31PM |
Registered: 14 years ago Posts: 268 |
And I run a smaller nozzle, so higher back pressure. Pla at 190c. Fastest I'm going in infill is 80 with a layer height of .2 (or less). I still don't see the doubling of the number being needed. I'm genuinely curious as to why we have different results, telling me "pick a number that works" isn't awful scientific. Furthermore if I saw that someone else was getting better performance I would be curious to know why.Quote
dc42
Quote
Koko76
Ok, so I have approximately 600 steps per mm, 16 micro steps. That's 37.5x6Ncm or 225 by your formula. I have done many 10+ hour prints with abs and pla of a variety of manufacturers/temps etc. I would characterize it as reliable. I'm trying to understand why you need or want more than 2 times that number.
Maybe it's because I run a delta that does PLA infill at 100mm/sec using a 0.4mm nozzle and I don't like to compromise on extruder temperature. Pick a figure that works for you.
Re: Pancake stepper extruder June 10, 2016 01:54PM |
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Re: Pancake stepper extruder August 12, 2016 10:29PM |
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Re: Pancake stepper extruder August 13, 2016 02:38AM |
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Re: Pancake stepper extruder August 13, 2016 04:23AM |
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Re: Pancake stepper extruder August 13, 2016 04:36AM |
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Re: Pancake stepper extruder November 18, 2017 03:22PM |
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Re: Pancake stepper extruder November 19, 2017 02:13AM |
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Has anybody seen a pancake stepper, 3d printed gear, direct drive/non-bowden extruder for a core XY like a d-Bot?
Re: Pancake stepper extruder November 19, 2017 08:22AM |
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Re: Pancake stepper extruder November 19, 2017 08:52AM |
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Re: Pancake stepper extruder November 19, 2017 09:00PM |
Registered: 10 years ago Posts: 53 |
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o_lampe
What's the difference in terms of "fun" to print another guys design instead of buying a Titan extruder?
Actually I ordered a Titan for my D-Bot and hope to get rid off the Bowden tube. The idea is to mount it with the clear plastic cover towards the hotend-carrier.