Banging on the 1/4 wondow motor really works
#1
#2
A shock will work sometimes.
The motor drives a worm gear and it will stick at the end of travel.
There is a rubber "spider" in the worm wheel that should help the motor reverse, but it perishes or deforms over time.
Then it is pot luck if the motor will reverse.
Pull it apart and with luck you can reset the rubber spider, use a bit of rubber grease to bed it, and with luck you are good for a few more years.
I do not think you can buy a new spider.
The motor drives a worm gear and it will stick at the end of travel.
There is a rubber "spider" in the worm wheel that should help the motor reverse, but it perishes or deforms over time.
Then it is pot luck if the motor will reverse.
Pull it apart and with luck you can reset the rubber spider, use a bit of rubber grease to bed it, and with luck you are good for a few more years.
I do not think you can buy a new spider.
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Greg in France (05-19-2024)
#4
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3Jagsplusothers (05-20-2024)
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#9
These motors draw about 4A moving the window, and at end of travel they stall and draw 10A.
There are no limit switches, too complicated and not required.
The problem is when they stall they lock up the worm and wormwheel.
When you switch to reverse the torque might not be quite enough to unlock.
What is needed is a spring in the system which the motor "winds up" when it stalls at end of travel.
Now when it reverses it has the torque of the motor plus the unwinding of the spring which is enough to unlock.
The rubber spider is the spring, and without it the motor may or may not always reverse.
There are no limit switches, too complicated and not required.
The problem is when they stall they lock up the worm and wormwheel.
When you switch to reverse the torque might not be quite enough to unlock.
What is needed is a spring in the system which the motor "winds up" when it stalls at end of travel.
Now when it reverses it has the torque of the motor plus the unwinding of the spring which is enough to unlock.
The rubber spider is the spring, and without it the motor may or may not always reverse.
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ptjs1 (05-22-2024)
#10
Hmmmmm.
Three small diameter (diameter slightly less than the rubber thickness) coil springs with a sufficient wire diameter/spring rate could replace the rubber piece.... slip the drive tangs into the middle of the spring coils.
Other than that, up/down button switch discipline could help, keep from jamming the motor in either position
Doug
Three small diameter (diameter slightly less than the rubber thickness) coil springs with a sufficient wire diameter/spring rate could replace the rubber piece.... slip the drive tangs into the middle of the spring coils.
Other than that, up/down button switch discipline could help, keep from jamming the motor in either position
Doug
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