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  1. #1
    Join Date
    Jul 2003
    Posts
    276

    Stepper rough 1 direction

    As you can tell I am new to steppers!

    But what would make a stepper driven by a PicStep driver smooth in 1 direction but rough in the other?

  2. #2
    Join Date
    Mar 2005
    Posts
    8

    Question My first post

    Hi all,

    I have the same problem.

    Any idea to solver this?

    Thanks.

  3. #3
    Join Date
    May 2005
    Posts
    1810
    Someone - help these guys out!! (just a post bump to help out!!)

  4. #4
    Join Date
    Mar 2005
    Posts
    8

    Talking Working

    Now is work fine after change PIC.
    With unloaded stepper motor (HT23-400 264oz-in, 2.8A),
    I can turn 300rpm without any resonance (8micro-stepper).
    Very nice board and firmware.
    Thanks Alan.

  5. #5
    Join Date
    Sep 2004
    Posts
    223
    Quote Originally Posted by Lucas-10
    Now is work fine after change PIC.
    With unloaded stepper motor (HT23-400 264oz-in, 2.8A),
    I can turn 300rpm without any resonance (8micro-stepper).
    Very nice board and firmware.
    Thanks Alan.
    Hi, Glad you figured it out. I've been busy and not looking around the forums much these days.

    One thing, what revision PIC16F628As did you use? I'd be interested in knowing the revision numbers on these PICs that work and don't work, maybe there is a bug in their construction that is effecting the PICSteps performance that Microchip has repaired/replaced. I've used 30 or so 16F628As and never had any issue, but globally you never know!


    Cheers,
    Alan.

  6. #6
    Join Date
    Mar 2005
    Posts
    8
    Hi Allan.

    I use old parts from another board (crap board)
    and can’t read revision numbers, sorry.
    I bought 3 new PIC’s and its work very fine.

    Thanks.

  7. #7
    Join Date
    Mar 2005
    Posts
    523
    if the motor workes fine in one direction and the the other the only think ( i think ) it can be is software in the microcontroller or pc software ( that is if u r using a 4 pole stepper, if it is a 2 pole it coule be the above plus a flakey drive transistor

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