STX-16803 Shutter Misaligned, Shutter Motor Noise

Discussion in 'STX and STXL' started by Russell Croman, May 21, 2020 at 1:29 AM.

  1. Russell Croman

    Russell Croman Cyanogen Customer

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    May 8, 2020
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    Hi,

    Just received my STX-16803, wondering if the shutter has an issue. Before and after each exposure, there is a fairly loud 500Hz tone coming from the shutter motor... seems like it's working hard. Also, during the exposure, the shutter opening is misaligned with the camera body opening. See attached picture.

    Is this normal?

    Thanks,

    Russ
     

    Attached Files:

  2. Doug

    Doug Staff Member

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    The voltage to the motor is pulsed to control the power dissipation. It may make some noise as a result.

    @Tim can comment on the alignment.
     
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  3. Russell Croman

    Russell Croman Cyanogen Customer

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    Looking forward to that. Is the shutter alignment field-adjustable? I noticed a couple of trim pots on the circuit board near the connector to the shutter drive motor.

    The motor noise is quite loud... I wouldn't want be sitting near the camera while imaging. Seems like maybe the firmware could stop driving the shutter motor once it's done moving the curtain.

    -Russ
     
    Last edited: May 21, 2020 at 7:33 PM
  4. Doug

    Doug Staff Member

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    Do NOT turn any trim pots! They don't have anything to do with the shutter.
     
  5. Russell Croman

    Russell Croman Cyanogen Customer

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    I wouldn't dream of it without specific guidance.

    -Russ
     
  6. Russell Croman

    Russell Croman Cyanogen Customer

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    I'm also less worried about shutter alignment now... once I installed the filter wheel, it's clear that the filter aperture will vignette before the shutter does. It just caught my eye as I was running the camera through its paces.

    -Russ
     
  7. Tim

    Tim Staff Member

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    Shutter alignment is not an issue unless it starts encroaching on the FOV of the CCD sensor.
     
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