On Sunday 28 May 2017 11:16:13 Chris Albertson wrote: > On Sat, May 27, 2017 at 9:51 PM, Fox Mulder <[email protected]> wrote: > > These little machaduino boards look good for small size motors they > replace the driver board > > The Leadshine and other Chinese versions are not copies because > (1) They use 10000 line quadrature encoders not the magnetic sensor > and (2) They can handle much more powerful motors. The Kickstarter > project is for smaller motors, the max DC volts in looks to be 25V but > I could but quickly find the max current. > What I've looked at is the A4954? specs, 2 amps. And I believe the v max is 35 volts but that would have to be a resistive load. The previous Allegro chip that xylotek uses, the A3977 IIRC, is a similar but 3 amp chip, and I have destroyed 3 of those on 28 volts on the micro-mill from HF. I have not managed to damage a 2M542 driver yet, even with shorts or cross connected motor coils, it detects the error and disables itself, indicating that with a red led, running it at close to max current and around 43 volts. Motor is an 8 wire NEMA 24 wired parallel. I have 4 of them on the micromill, and 2 of them on TLM, but they are only running on around 38 volts. Heating on those rises as the voltage is lowered because of the higher % of on times I'm guessing, and they are not recommended below 24 volts. And one on the sheldon running the x motor.
> But if these go into mass production and the price gets to be less > then the current $45 each I'd buy a few or being open source maybe > make something based on in. > > > https://www.kickstarter.com/projects/tropicallabs/ > > mechaduino-powerful-open-source-industrial-servo-m > > > > https://hackaday.io/project/11224-mechaduino > > > > -- > > Chris Albertson > Redondo Beach, California Cheers, Gene Heskett -- "There are four boxes to be used in defense of liberty: soap, ballot, jury, and ammo. Please use in that order." -Ed Howdershelt (Author) Genes Web page <http://geneslinuxbox.net:6309/gene> ------------------------------------------------------------------------------ Check out the vibrant tech community on one of the world's most engaging tech sites, Slashdot.org! http://sdm.link/slashdot _______________________________________________ Emc-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/emc-users
