Near Intersection of I-35 & I-90 Southern Mn. | Yes, the diode install would be across or in parallel with the limit switches. And Yes, each end would be similar but "opposite" in orientation. The idea is that the diode will allow the current to go in the opposite direction even when the switch is open (when the actuator is at an extreme). Another way of putting this is that in one polarity, the switch breaks the circuit and the diode does not let the current pass so the actuator stops. In the other polarity either the switch or the diode allows current flow to allow the actuator to turn the opposite direction. Once the limit switch is no longer depressed both the switch and the diode allow current to flow.
If you watched the actuator very carefully with this setup, you would see that once the extreme is reached, the action should stop. When you push the switch the other way, the reverse action should start (diode is carrying the current) and once the action has progressed a ways, the limit switch is again released (closed) causing the actuator to pick up a bit of speed. This is due to the fact that some voltage is dropped across the diode so the speed at first is a bit slower, once the switch closes again, the speed returns to normal.
Edited by tedbear 10/31/2014 09:27
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Linear actuator limit switch wiring? How to?
