Linear acuator limit switch questions - Parallax Forums

This device has two wires to drive it, just reverse polarity to go the other direction. It shows a limit contacts at #14 a Limit Switch Bar at #7. Since the device stops working in each direction when it hits the end of travel switch area, and since it can still reverse, this means they are using some diodes in the limit scheme to stop the flow of current in one direction only. I want to use the device in conjunction with other motors and this one needs to complete and be sure it completed before proceeding. I was thinking the power to the actuator for one direction could be a DPST relay that connects both GND and +V. The device will have a known travel time, so the Prop could tell it to move by setting the relay, then wait until slightly after the known travel time to turn off the relay. Once the device hits the limit I am assuming that no more current will flow in that direction and then it could be possible to switch in a +V on the same + side we were just using on the relay and check of a voltage on the other wire of the actuator. If the device has arrived then the path will be completed and the prop can see the voltage ( maybe use a divider and still use 12V). If the voltage is not present on the test then shut down and warn of a fault. There is no other easy way to rig up another switch or sensor to detect the travel completion in this application and I thought why not use the built in diode/limiting scheme. Since I don't have that device I was wondering if this logic makes sense.

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What is the important part of numbers on limit switch

What number do I use to order new one?
313245
t-0-d 60t11
s0628
l-150-20f

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Last edited by chuck Stan; 12-15-22 at

08:27 AM

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