How To - Tips > Doors

how do you get the window to stop?

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notnilc20:
Thanks guys.... Is the reason that it switches to a ground is so you can then have power to move the window the opposite way?? 

I was planning on doing this but I guess I need a switch that will switch to another source once it's tripped instead of the one I have where it just switches off.  Where do you get your switches from?  Would like to find some that are spring loaded internally so they are only switched while the pressure is on them and then they switch back as soon as you remove pressure from the switch arm so that way I can avoid having to mount springs somewhere in this already cramped space.  Thanks.

Also, can you tell me some good ways for mechanical stopping?  Will doing mechanical stopping only be hard on the motor?  Is this the way the factory window motors are done?   

One more thing.  Some pics of your application would do wonders for me.  (Mounting, how did you get the switch to trip? etc etc )  I know, it's a lot of questions, but I appreciate it.  Thank you!!

RT:
Thanks for posting that diagram, Jim.  You beat me to it!  LOL
I use that limit switch system for every motor drive.  I even had a door lock/unlock motor burn up because they can't take too much power while at the end of travel.  The wiring is too simple to not use.  Figuring the where and how of mounting the switches is the hardest (?) part but worth the effort.  Just make sure they are secure and won't move so the window (or other device) will always stop where you expect.

RT

BTW, I also use mechanical stops too, just in case.

jdinner:
There are two ways.
1) study the mechanism to see what moves and weld on a tab somewhere so a long bolt will act as a stopper. The bolt can be adjusted in length to fine tune the stop point.
2) install micro-switches that cut off the circuit when it gets to a certain point.
Image stolen from RT.

notnilc20:
Hi there,

For those that have built their doors with working power windows.  How do you get it to stop at the top when the window is closed and at the bottom when opening, so the window doesn't go all the way down? 

since the window is too big for the door you can only "roll" it down part way (about halfway).  How can you stop the motor at this precise point so you don't accidentally roll down too far?  Also, the same when going up.

Thanks
 

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