What the thread found

• A motorized top stage began moving the camera backward uncontrollably several years into operation, with the problem stopping only when the Preston MDR power was disconnected.
• The malfunction occurred consistently on set but could not be reproduced in the manufacturer's workshop when the Preston MDR was not connected.
• Switching from an older MDR to an MDR-2 unit did not resolve the problem.
• The issue persists when walkie-talkies are used, suggesting they are not the cause.
• The receiver unit has a small stubby antenna pointing horizontally to the right of the rig.
• Power supply interaction with the Preston MDR or electromagnetic interference was suspected as a potential cause.

Depends on

• This is an earlier generation Ultra motorized top stage, likely built around 2000-2001.
• The problem was reported on location but could not be reproduced in a controlled workshop environment.
• No definitive root cause was identified during the troubleshooting process.
• The manufacturer's testing methods differed from the user's operational setup.
• The discussion does not provide details about specific Preston MDR settings or power configurations that might have triggered the issue.

Gear in this thread

MDR

Parts

Top Stage

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