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  1. #11
    Quote Originally Posted by centurian View Post
    I'm fed up with Customs pouncing on me every time I buy something abroad.

    I'd be grateful for any help with this inquiry.

    Thanks a lot.

    Hi Mike,
    The customs here in Spain pushed me. So i push now all people i buy from. "Please could you state it lower than 20EU?", that before buying / or i don't buy from you / . And it works. I wonder why i have never done it before.
    I buy ALL stuff i need from the net, so we are talking $$$$ here
    project 1 , 2, Dust Shoe ...

  2. #12
    Ian - the grbl wiki seems to suggest that even the uno (328P based?) can get up to 30KHz, which is pretty good going. Quick back-of-the-envelope sums suggest that with a 5mm pitch ballscrew and 800 microsteps, a 16KHz pulse rate would give 6m/min. That's a pretty good performance per pound out of the little 328P chip and even in terms of absolute performance is close to what I get from my LinuxCNC machine. Be interested to hear your findings.

  3. #13
    Arduino Uno with GRBL firmware controlling 3 AM882 drives with 3 NEMA 23 steppers.

    It's a first test but it seems to be working very well.

    Oh, I know, I know excuse the crappy wiring !!!

  4. #14
    Good stuff. Any idea what kind of pulse rates you can achieve, and what kind of stepper rotation speeds that translates to with microstepping in place?

  5. #15
    No idea yet. Need to get into GRBL and work out it's settings. Micro stepping on the driver is currently set at 400. Will have another play around with it over the weekend.

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