High performance motor controllers May 08, 2016 11:24AM |
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Re: High performance motor controllers May 08, 2016 02:02PM |
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Re: High performance motor controllers May 08, 2016 02:23PM |
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Re: High performance motor controllers May 08, 2016 04:53PM |
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Re: High performance motor controllers May 08, 2016 04:57PM |
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Re: High performance motor controllers May 08, 2016 09:08PM |
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Re: High performance motor controllers May 08, 2016 09:35PM |
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Re: High performance motor controllers May 08, 2016 10:07PM |
Registered: 9 years ago Posts: 1,873 |
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rmlrn
Gotta disagree, seems like I'm always finding new ways to kill lipo cells. Can't you use something less fragile like supercaps?
Re: High performance motor controllers May 08, 2016 10:09PM |
Registered: 9 years ago Posts: 1,873 |
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DRobs86
Outstanding work! I am a bit concerned, however, that there are only two motor channels. I imagine most any application is going to need three channels. Pick and place probably wont need three channels, but I think you could hurt the marketability of the driver when it comes to CNC and 3D printing by only being able to drive two axes. I think it either needs to be offered in a single channel, a three channel, or a four channel.
Re: High performance motor controllers May 09, 2016 03:09AM |
Registered: 8 years ago Posts: 29 |
But, where source is? Only general description at the link exists.Quote
madcowswe
It is an open source
recuperation - more suitable term. (Yes, it is funny remark considering my english).Quote
madcowswe
...energy regeneration...
With LiFePO4 a 3%-stability achievable without additional converters.Quote
madcowswe
...Li-Po ... variable voltage DC bus ... DC-DC converter ...
Re: High performance motor controllers May 09, 2016 04:59AM |
Registered: 7 years ago Posts: 24 |
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rmlrn
Quote
JamesK
Wow! That's stunning. And the lipo power reservoir is brilliant!
Gotta disagree, seems like I'm always finding new ways to kill lipo cells. Can't you use something less fragile like supercaps?
Re: High performance motor controllers May 09, 2016 05:05AM |
Registered: 7 years ago Posts: 24 |
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DRobs86
Outstanding work! I am a bit concerned, however, that there are only two motor channels. I imagine most any application is going to need three channels. Pick and place probably wont need three channels, but I think you could hurt the marketability of the driver when it comes to CNC and 3D printing by only being able to drive two axes. I think it either needs to be offered in a single channel, a three channel, or a four channel. Maybe there is something that I am not following, but thats the way I see it. Again, great work.
Good luck. I will be following this one closely.
Re: High performance motor controllers May 09, 2016 05:10AM |
Registered: 7 years ago Posts: 24 |
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Andrey_SSh
But, where source is? Only general description at the link exists.Quote
madcowswe
It is an open source
Re: High performance motor controllers May 09, 2016 12:02PM |
Registered: 8 years ago Posts: 3,525 |
Re: High performance motor controllers May 09, 2016 07:54PM |
Registered: 9 years ago Posts: 96 |
Re: High performance motor controllers May 10, 2016 10:17AM |
Registered: 7 years ago Posts: 24 |
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DRobs86
I can see your point. So the plan would be to use an o drive for x and y and use a standard stepper driver for Z (and E if on a printer application). I could see that. The speed is great, but just as important as that to me is tbe closed loop system. That is more of an issue in my applications on x and y so perhaps an o drive would be fitting. Where this could really shine from an economic perspective is applications where you would be using very hefty NEMA 23s or 34s.
Re: High performance motor controllers July 02, 2016 08:02PM |
Registered: 7 years ago Posts: 24 |
Re: High performance motor controllers December 15, 2016 11:25AM |
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Re: High performance motor controllers December 15, 2016 03:04PM |
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Re: High performance motor controllers December 16, 2016 12:15AM |
Registered: 7 years ago Posts: 24 |
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MechaBits
When you say cheap hobby motors, how much you talkin'.... i paid £5 for a tiny drone motor...a more substantial stepper not too much, more.
Re: High performance motor controllers December 17, 2016 11:21AM |
Registered: 9 years ago Posts: 1,873 |
Re: High performance motor controllers December 17, 2016 11:35AM |
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Re: High performance motor controllers December 19, 2016 10:53AM |
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Re: High performance motor controllers December 19, 2016 09:42PM |
Registered: 7 years ago Posts: 24 |
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tobben
Hello, I've waited and hoped for a project like yours. Thanks for making it open source.
How heavy is a board+4 motors?
I'm in desperate need of lighter motor alternatives to drive the Hangprinter Project forwards. If you think that a oDriven Hangprinter a good idea I would like to work with you!
PS! See my blog for pics and description of Hangprinter.
Re: High performance motor controllers December 20, 2016 10:21AM |
Registered: 10 years ago Posts: 401 |
Re: High performance motor controllers December 22, 2016 06:35AM |
Registered: 7 years ago Posts: 24 |
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tobben
Hi, thanks!
Those motors look bad-ass. I guess 1/10'th of their torque is enough for Hangprinter. The torque requirement is only ca 5 Ncm at 2-3 revs/s.
The reason for the single-unit design is the possibility to park such a unit in the ceiling. Without discreet parking I wouldn't get my wife's blessing to install it in the kitchen. I
really wish I had a dedicated lab or workshop, but alas, what is engineering if not working around constraints.
With ~20 g motors, we would save 700 g compared to the current Hangprinter. Anchor-mounting motors would save an additional 100 g, but at a high cost in terms of engineering hours per machine. It would be worth it if print speed requirement was > ca 1 g/s, but it would be a very different machine than the current one.
I had BLDC motors in mind when I first designed Hangprinter, but I lacked the motor control knowledge and found no off-the-shelf BLDC solutions.
I saw on your blog (oh, and in this thread) that you've had a board production run. If it's possible for me to convert my little Marlin code and test BLDC as an (almost) drop-in replacement for my steppers, then I want one fast =D Bulding/soldering on my own is OK if you don't have any boards left. Using other types of commands than step/dir is also OK but will require more time and planning.
What motors do you recommend me to order for experimentation?
Do the step/direction input waste much power compared to other inputs?
thanks,
Re: High performance motor controllers December 22, 2016 08:05AM |
Registered: 10 years ago Posts: 401 |
Nice!Quote
madcowswe
The first interface that will be available will indeed be step/dir signals, so it should be okay to do a drop-in replacement. It has its limitations, but they are mostly to do with speed, and I think for most 3D printer applications it should be fine.
A gearbox is acceptable. Hangprinter's motors experience force from one direction only, so play is not an issue. We should be able to gear down without adding too much weight. We can always make lines double, triple or even quadruple to gear down more.Quote
madcowswe
In terms of motors, it would depend on if you think it is acceptable to have a reduction gearbox?
Re: High performance motor controllers December 23, 2016 10:08PM |
Registered: 7 years ago Posts: 24 |
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tobben
A gearbox is acceptable. Hangprinter's motors experience force from one direction only, so play is not an issue. We should be able to gear down without adding too much weight. We can always make lines double, triple or even quadruple to gear down more.
What do you think about using worm drives on all axes?
I have little experience with gearing down. The worm driven D-axis on the current Hangprinter is limited to 30 mm/s speed because the stepper+driver stalls/resonates.
Re: High performance motor controllers December 25, 2016 08:56AM |
Registered: 7 years ago Posts: 24 |
Re: High performance motor controllers December 25, 2016 09:20AM |
Registered: 12 years ago Posts: 2,470 |
Forget about the hotend, the viscosity of the molten filament makes this kind of speed a non starter.Quote
madcowswe
I have a question for everyone: What is the fastest extruder/hot-end that you know of?
I guess the reason I am asking is fairly self explanatory if you've seen the video ;D
Cheers,
Oskar