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Thread: Missing Steps

  1. 13th January 2013, 08:07 PM #1
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    warrick
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    Default Missing Steps

    Hi,
    I was playing with my machine and the X/A axises started losing steps and I have no idea why.
    What are the most probable causes ?
    I have tried slowing down the speed and acceleration to no avail

    Warrick
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  3. 14th January 2013, 10:13 AM #2
    ailmik
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    Pinion gear loose on your motors?
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  4. 14th January 2013, 11:00 AM #3
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    Quote Originally Posted by ailmik View Post
    Pinion gear loose on your motors?
    Checked that
    and re tighten them

    Warrick
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  5. 14th January 2013, 11:09 AM #4
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    What is the setup on your motors? IE how are the screws connected up? Belts? Direct?

    Also, check all electrical connections from the motors back to the BOB.
    Bob Willson
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  6. 14th January 2013, 08:17 PM #5
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    over loading of power supply ,
    getting a voltage drop when all 3 motors are running

    rare on the 5 volt bob ,unless powered buy USB ,and lots of USB things hanging off the PC
    could also happen on the stepper driver power supply , one motor will run fine , but stall when 3 are running, larger amps draw on a axis ?
    where's the photo's
    how come a 10mm peg dont fit in a 10mm hole
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  7. 9th February 2013, 10:16 PM #6
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    warrick
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    Found out eventually what my problem was, too much tension on the pinion drive. It took a while because my PC died and I had to find another. My boss had an old dual core, so I installed a new HDD and set it up with Win XP and all the required software. We also had shutdown at work for the last 3 weeks so I didn't get much time in the shed. I have just got my settings close to where I had them before and now am tuning the motors. All the old settings went when the old PC crashed. I will be writing them down just in case


    Warrick
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  8. 10th February 2013, 04:36 PM #7
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    x-axis-motor.jpgy-axis-motor.jpgz-axis-motor.jpg

    I have played around with the motor tuning settings, can anyone see something I may have done wrong ??

    Warrick
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  9. 10th February 2013, 05:17 PM #8
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    Your acceleration is very high. I suggest that you drop it to 100 and then go up from there until you lose steps again, then back off 20% again.
    I would also drop the velocity to about 3000. I can't remember ever going over about 2500mm a minute on my machine.
    Anyway, try it and see what happens.
    Bob Willson
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  10. 10th February 2013, 08:24 PM #9
    rodm
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    Hi Warrick,
    I am begining to hate posting here - if they can't get explorer working reliably then I give up - whinge over.

    I am not going to type it all again so give me a call and I can offer a few suggestions.
    Cheers,
    Rod
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  11. 11th February 2013, 12:15 AM #10
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    Serves you right for using explorer. Upgrade to Firefox and you won't have those problems.
    Bob Willson
    The term 'grammar nazi' was invented to make people, who don't know their grammar, feel OK about being uneducated.
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  12. 11th February 2013, 12:40 AM #11
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    ^^^^^^ seconded ^^^^^^^ . even "google chrome " actually works ,, don't blame the forum for microsofts poor coding habits
    how come a 10mm peg dont fit in a 10mm hole
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  13. 11th February 2013, 02:30 AM #12
    rodm
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    I asked for that.
    Sorry I'm staying with IE.
    Cheers,
    Rod
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  14. 17th February 2013, 05:31 PM #13
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    Got a chance to play in the shed today and made some adjustments, I got things working but woody still needs some fine tuning


    I made the sides for a Bow Maker (jig for making bows for my wife's craft)
    I also had a go at some text


    Warrick

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  15. 24th February 2013, 08:39 PM #14
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    Had a quick play in the shed to make my cnc's name sake after getting home from a weekend away

    Warrick


    woody.jpg
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