Garage door opener: now what ?

[Deschodt]

OK, I know this is the garage journal forum, not the door opener DYI special, but please humor me, I need some help...

A week or so ago my garage door stripped its main plastic gears and I ordered a new set. I spent close to 3 hours repairing replacing and reconnecting it all properly (I hope). But.... what happens now is that while the motor and gears are working again (up and down) , they only do so for a foot or so at a tinme, before reversing... That is in either direction (if going up it'll go a foot and reverse down, if going down, one foot and then back up).

Currently I can *trick* the door into closing or opening by canceling the "reverse" portion (by repressing the remote button)..but it's wrong. it takes 10 attempts to close it...

What am I missing? It did this with zero weight on the chain/trolley before I even hooked up the door so it's not an effort thing. Crossed wire ? it's also not the up/down max limits adjusters since I can fool the door as mentioned above. I don't see the main bulbs blinking as when the sensors detect an obstacle, but the LED on the unit itself does blink... I'll recheck the sensors are aligned but they have not moved.

Sorry to bug you guys with this, I just hate calling for service after doing all that work !

 

[porcupine73]

I don't know the exact details of how the opener works, but I am guessing it counts revolutions of one of the gears somewhere along the drivetrain to know the position of the door. Did one of your old gears maybe have something that a sensor (I'm envisioning like an ABS tone ring type deal) on the garage door was reading, that the new gears don't or anything like that? In this case I am guessing if the door does not see input from the rotation sensor in a certain period of time it will stop as a failsafe, as it does not know the position of the door anymore to know when it's fully open or closed?

 

[bjaspud]

My door does that when the photo eye that keeps the door from crushing you is out of alignment. Might you have knocked the photo eye?

 

[Deschodt]

Okay, I troubleshooted this some more, the LEd indicated the motor is overheated/RPM sensor not working properly. It's not me ! But it $%$#% me off I wasted the $28 + 3h on the kit and still need another part. I'm gonna replace the whole unit with a quieter one and be done !

 

[LEVE]

IMHO, there's too much force for the motor to overcome. I'd be looking at track alignment or how the door's springs are working.

 

[Deschodt]

I take it all back, it WAS me !!!

out of morbid curiosity I looked up the RPM sensor, it's a little circuit board and a plastic cap... Lightbulb !! A plastic cap....which I'd seen before but did not put back on !!! Found it under the car, turns out it has a copper inside and is probably like a distributor cap or something..5 seconds later, it works !! I cannot freaking believe it, it works !!! ;-)