REFLECTOR: Elevator trim problem
John Dibble
aminetech at bluefrog.com
Thu Jan 12 09:15:02 CST 2012
While we're on this subject, I need help with an issue with my elevator
trim. Over the past 100 hours, infrequently it seems to trim up
uncommanded. I push forward on the stick to keep level and push the
trim down button. For a second or two nothing happens. Then it
responds properly. I know if I press both buttons at once, nothing
happens, so I'm guessing that there is still an up input in the second
or two when nothing happens. I have a solid state relay that failed
once. In that case the output voltage reduced to where the motor
wouldn't run. I have a Mac 7 stick. On the ground the buttons operate
well with no sign of sticking. I have several questions.
Where is the mechanism that prevents operation when both buttons are
pressed? In the stick? In the relay? In the motor?
Can I eliminate the relay and run full current through the stick?
I may wire lights to the leads going to the motor so I can confirm when
current is being sent to the motor.
Thanks,
John
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