TimSch

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  • May 10, 2012 at 12:02 pm in reply to: TinyG stops if G0 has x,y,z coordinates the same #1412
    TimSch
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    You’re absolutely right – steppers, not servos – some wires must have crossed in my head while I was typing – sorry for any confusion I may have caused.

    Motors are the Sparkfun 68oz inch 1.7A/Phase steppers (got “steppers” right this time 😉 made by Wantai Motor (http://www.wantmotor.com/ProductsView.asp?id=157&pid=80 model 42BYGHM809)

    Naturally the manufacturer doesn’t have an easily found datasheet, so the best I can provide is from Sparkfun: http://dlnmh9ip6v2uc.cloudfront.net/datasheets/Robotics/42BYGHM809.PDF (from http://www.sparkfun.com/products/10846)

    I’m inclined to think that it was not a driver current limit issue, as I could reliably send a g0 command to any of the motors individually, or to combinations of them with no problems – but i’m not willing to rule that out as an issue either. I’m still learning all the configuration settings, so I’d be more willing to bet that I had a setting that was entirely incorrect.

    Thanks again for your time – I’m excited to start using TinyG.

    Cheers
    Tim

    May 10, 2012 at 10:58 am in reply to: TinyG stops if G0 has x,y,z coordinates the same #1410
    TimSch
    Member

    Hi Riley.

    Thanks for the reply –

    My first thought was the power supply as well. Supposedly the supply is 24v 10A, but I haven’t actually tested its limits yet. I hooked the TinyG up to a reasonably high quality electronics lab power supply that I have and noted that the current @15v never went above 0.4A before the servos shut down, and shut down without tripping the current limiter on the supply.

    That said – I did as you suggested and reset the defaults and the g0x100y100z100 command now works as expected – so i’ll write this up to user error on my part and will let you know if I find a configuration setting/group of settings that can make this reliably happen.

    Cheers!
    Tim

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