Re: Servolulu: Polulu-compatible servo motor driver May 02, 2016 02:37PM |
Registered: 10 years ago Posts: 564 |
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etfrench
One more question, are you planning on using 2 oz boards? The traces seem kind of small for 2 amps with a 1 oz board.
Re: Servolulu: Polulu-compatible servo motor driver May 02, 2016 02:55PM |
Registered: 9 years ago Posts: 483 |
Re: Servolulu: Polulu-compatible servo motor driver May 02, 2016 04:53PM |
Registered: 7 years ago Posts: 2 |
Re: Servolulu: Polulu-compatible servo motor driver May 02, 2016 05:02PM |
Registered: 9 years ago Posts: 330 |
Re: Servolulu: Polulu-compatible servo motor driver May 02, 2016 05:11PM |
Registered: 8 years ago Posts: 181 |
SoonQuote
drmaestro
Exciting development. I hope we can use it soon on our printers.
Re: Servolulu: Polulu-compatible servo motor driver May 03, 2016 02:50AM |
Registered: 8 years ago Posts: 5,232 |
Re: Servolulu: Polulu-compatible servo motor driver May 03, 2016 03:05AM |
Registered: 8 years ago Posts: 181 |
Re: Servolulu: Polulu-compatible servo motor driver May 03, 2016 03:14AM |
Registered: 11 years ago Posts: 31 |
Re: Servolulu: Polulu-compatible servo motor driver May 03, 2016 03:17AM |
Registered: 12 years ago Posts: 2,470 |
A servo is a closed loop system. This means that there is a feedback on the actual position that is then used to correct positioning to reach the intended position. This is usually done via a PID control. This can be used to stabilize RPMs as well.Quote
o_lampe
Dumb question:
What makes a DC motor a DC Servo motor? Is it just the encoder or number of poles or???
Re: Servolulu: Polulu-compatible servo motor driver May 03, 2016 12:21PM |
Registered: 12 years ago Posts: 33 |
Re: Servolulu: Polulu-compatible servo motor driver May 03, 2016 12:24PM |
Registered: 7 years ago Posts: 2 |
Re: Servolulu: Polulu-compatible servo motor driver May 03, 2016 06:44PM |
Registered: 8 years ago Posts: 181 |
Re: Servolulu: Polulu-compatible servo motor driver May 03, 2016 07:03PM |
Registered: 10 years ago Posts: 564 |
Re: Servolulu: Polulu-compatible servo motor driver May 04, 2016 02:23AM |
Registered: 8 years ago Posts: 181 |
Sorry for spamming your thread. I started a new one and I'll refrain from further posts here. Good luck with your project.Quote
LoboCNC
rklauko: Great to see someone else working on servo control, but interleaving progress on your controller with the Servolulu development in the same thread is getting a little confusing. Perhaps you could start your own topic.
Re: Servolulu: Polulu-compatible servo motor driver May 08, 2016 10:56AM |
Registered: 7 years ago Posts: 78 |
Re: Servolulu: Polulu-compatible servo motor driver May 08, 2016 11:41AM |
Registered: 11 years ago Posts: 31 |
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ipcalit
Would Servolulu work with one of these magnetic encoders from Pololu?
Magnetic Encoder Pair Kit for Micro Metal Gearmotors, 12 CPR, 2.7-18V (HPCB compatible) [www.pololu.com]
It would be great for this ultralight extruder [forums.reprap.org]
Re: Servolulu: Polulu-compatible servo motor driver May 08, 2016 11:45AM |
Registered: 8 years ago Posts: 181 |
Re: Servolulu: Polulu-compatible servo motor driver May 08, 2016 12:15PM |
Registered: 7 years ago Posts: 78 |
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rklauco
But the gearing is quite serious with the little motor (so is the torque), so 12 impulses per revolution should be plenty...
Re: Servolulu: Polulu-compatible servo motor driver May 08, 2016 01:04PM |
Registered: 10 years ago Posts: 20 |
Re: Servolulu: Polulu-compatible servo motor driver May 08, 2016 03:12PM |
Registered: 10 years ago Posts: 564 |
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pamalofeev
LoboCNC,
I like that there are more attempts to do good dc servo reprap. You can show your servo Operation diagram, which will be open source? Just like here. Or tell which loops will be used?
Re: Servolulu: Polulu-compatible servo motor driver May 08, 2016 04:56PM |
Registered: 8 years ago Posts: 181 |
Re: Servolulu: Polulu-compatible servo motor driver May 09, 2016 01:49AM |
Registered: 10 years ago Posts: 20 |
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LoboCNC
The current version of the Servolulu uses PIC-SERVO SC code, and you can view all of the gory details in the PIC-SERVO SC data sheet. .
Re: Servolulu: Polulu-compatible servo motor driver May 09, 2016 02:43AM |
Registered: 8 years ago Posts: 181 |
Re: Servolulu: Polulu-compatible servo motor driver May 09, 2016 07:22AM |
Registered: 10 years ago Posts: 20 |
Re: Servolulu: Polulu-compatible servo motor driver May 09, 2016 11:09AM |
Registered: 10 years ago Posts: 564 |
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pamalofeev
If you overwrite project in C, you did not think to use other mcu? For example stm32f030f4p6.
Re: Servolulu: Polulu-compatible servo motor driver May 09, 2016 01:22PM |
Registered: 10 years ago Posts: 20 |
Re: Servolulu: Polulu-compatible servo motor driver June 07, 2016 03:46PM |
Registered: 8 years ago Posts: 181 |
Re: Servolulu: Pololu-compatible servo motor driver June 07, 2016 06:47PM |
Registered: 10 years ago Posts: 564 |
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rklauco
LoboCNC: Do you have experience with A4953? Mine is quite disappointing - I got it yesterday and tested it today and it is quite hot during position hold. Is it due to my board design? (No heat pads or anything similar, but driving only 3.6W 12V motor...)
Re: Servolulu: Pololu-compatible servo motor driver June 13, 2016 05:24AM |
Registered: 8 years ago Posts: 181 |
Thanks for the hint.Quote
LoboCNC
How much current are you running through the motor? The total on resistance of the A4953 is about 1 ohm, so I'd guess that with no connection to the thermal pad, it'll get pretty hot even if you are drawing less than 1amp.
Re: Servolulu: Pololu-compatible servo motor driver June 13, 2016 05:37AM |
Registered: 11 years ago Posts: 31 |