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IndustryArena Forum > OpenSource CNC Design Center > Open Source Controller Boards > open source Atmel/arduino PID motor control
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  1. #241
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    Re: open source Atmel/arduino PID motor control

    The TRIAC is driven by a MOC3022.
    By the way, if I look at its input (pin 1) with an oscilloscope, the signal remains the same whatever the pot position.

  2. #242
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    Re: open source Atmel/arduino PID motor control

    That certainly is not right. Your zero cross detector is suppose to sync with your line freq. Are you triggering your 'scope to the line freq? Else it will stay the same if it triggers with itself.

  3. #243
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    Re: open source Atmel/arduino PID motor control

    No, my scope doesn't support such high voltage.
    The signal shown previously is the Arduino's input.

  4. #244
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    Re: open source Atmel/arduino PID motor control

    I would use the Arduino input (ZC) to also trigger your 'scope and then 'scope your pulse output of the Arduino, which should move position with pot rotation.

  5. #245
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    Re: open source Atmel/arduino PID motor control

    I am afraid I don't know how to do that.

  6. #246
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    Re: open source Atmel/arduino PID motor control

    Have you used EXT trigger?
    Must be a front panel jack for an external trigger. You would this jack to connect to the ZC signal going to your Arduino input. Then set your trigger mode to external. You monitor on channel 1 (or 2) the Arduino output pulse.
    I don't have your type of 'scope so I can't give specific steps to follow.

  7. #247
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    Re: open source Atmel/arduino PID motor control

    Oh I see !
    The pulses are fixed when the pot is at a low value (around 100) but are scrolling when I raise it.

    Attached Thumbnails Attached Thumbnails IMG_3459.JPG  

  8. #248
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    Re: open source Atmel/arduino PID motor control

    So the pulses do move relative to the zero crossing signal. The next step is to figure out why the motor doesn't change rpm with the pot change.

  9. #249

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    Jul 2019
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    Re: open source Atmel/arduino PID motor control

    Hi all,
    this project have a protection about motor stuck or over current or not?
    Thanks.

  10. #250
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    Re: open source Atmel/arduino PID motor control

    The protection is a fuse in the motor wiring. The fuse should be sized such that if the motor stalled the fuse will blow. This fuse amperage selection will vary depending on the motor selected and its current ratings.

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