Hello first post here. Im using a automotive window motor to drive a lead screw. Im using 12v. Is there a simple way to put something inline so when the leadscrew reaches the end of the travel and hits a stop, it stops the current to the motor but I can then go into the other direction? Im trying to avoid limit switches. Something along the lines of the car window when it hits the bottom or top of travel. Thanks Steve

 

If you can arrange a flag to slip into the space between the emitter and receiver of an optointerrupter, you could use that as the full trave indication. It also allows a fairly accurate means of making the travel repeatable. Using the signal to not only stop the travel, but to also switch a relay so the next movement will be in the other direction would be fairly easy.