Premium Members chris ragozzino Posted December 10, 2014 Premium Members Report Share Posted December 10, 2014 Hey all, I ran into a slight problem on a shoot recently. When I was calibrating my motor, it would just keep spinning out of control and the only way I could stop it would be to disconnect the power. I messed with the cables a little bit and eventually got it to behave, but this is a bit concerning since it's a fairly new system. Has anyone else ran into this problem? What could it be? Thanks everyone! -Ragz Quote Link to comment Share on other sites More sharing options...
Premium Members Lee Kazista Posted December 10, 2014 Premium Members Report Share Posted December 10, 2014 When a Preston motor does that it normally means that the encoder is blown. Quote Link to comment Share on other sites More sharing options...
Premium Members Jarrett P. Morgan Posted December 10, 2014 Premium Members Report Share Posted December 10, 2014 Is it a digital motor or an analog? either way, I would suggest trying a new motor cable. And setting aside the old one until someone with a mulitmeter looks at it. You don't want to really damage something... Quote Link to comment Share on other sites More sharing options...
Premium Members Alan Rencher Posted December 11, 2014 Premium Members Report Share Posted December 11, 2014 If you are using a digital system, you might want to check the torque. You can reset everything to factory default by holding the calibrate button while plugging the power cable in. Quote Link to comment Share on other sites More sharing options...
Premium Members Peter Hoare Posted December 11, 2014 Premium Members Report Share Posted December 11, 2014 This kind of behaviour in digital systems (we call them runaways) is usually either encoder damage or some kind of wiring failure. If the encoder is broken, this will happen. If there is a wiring problem and the power to the encoder is faulty, or one of the signal lines is broken, the same will happen. We have an error handling system in the axis1 that detects a runaway and stops the motor turning to prevent lens damage. If there is an encoder or wiring failure, there is not much that can be done besides physically finding the problem and fixing it, but at least it prevents the motor speeding off and damaging any lenses. Pete. 1 Quote Link to comment Share on other sites More sharing options...
Premium Members chris ragozzino Posted December 16, 2014 Author Premium Members Report Share Posted December 16, 2014 Thanks everyone. I just recently had another shoot and it all seemed fine, but it is a little concerning. It's an analog system so I'll get the wiring checked out. Thanks again! Quote Link to comment Share on other sites More sharing options...
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