limit switches to control motor direction

Question

I am trying to use two limit switches and two DPDT relays to control the direction of the motor. When the power is applied the motor should rotate one direction (direction for this question isn't important). Also, at this point (initialization) neither switch will be energized. The motor will rotate and move until it energizes the second limit switch (labeled Switch 2). At this point, the direction of the motor should reverse. The motor and hardware will then move towards switch one. Once the motor reaches switch one it should stop completely (not reverse direction again). Below is my basic wiring diagram.

I wired it up and when I supply power the motor rotates. However, whenever switch 2 is energized I can hear relay 2 energize and de-energizes quickly but no motor rotation.

Also, I am trying to implement a latching relay when the motor reverses direction. I do not know if my problem is occurring there.

Finally, I am having problems trying to figure out how to have the motor stop once switch 1 is energized.

Any help with my two problems (reversal of direction, and stop when switch 1 energized) would be greatly appreciated.

Answer 1

Initial condition: no relays energized. One set of RY2's direct power one direction to the motor. Second condition: SW2 triggered, its NO contact energizes RY2, which reverses motor polarity and latches itself (you'll need a pair of diodes or another relay contact set to accomplish both reversal and latching). Third condition: SW2 released, RY2 is still latched, mechanism swings the opposite direction. Fourth condition: SW1 triggered, its NO contact energizes RY1. An NC contact set on RY1 breaks RY2's latching circuit, and the same NO contact latches RY1 on until power drops away. The second RY1 contact set's NC interrupts power to the motor.

EDIT: Here's what I have in mind:

Answer 2

The dashed lines indicate mechanical connections, and the circuit works like this:

With power ( + and - ) connected and limit switches LS1 and LS2 disengaged, the only avenue available for current flow will be from the supply positive (+) to K1-1, then through K1-2, the motor, K1-5 and 4, and finally through K2-1 and 2 to the supply negative, (-).

That will cause the motor to rotate clockwise, and after a time it will engage LS1, closing LS1-C and NC, which will connect the supply positive to K1-11 and allow current to flow through the relay coil and into the supply negative through K2-1 and 2.

When that happens, the magnetic field generated by K1's coil will cause K1-7 and 8 to close, in parallel with LS1, which will latch K1 even if LS1 is later opened.

K1's coil being energized will also cause its other two sets of contacts to switch, with the result being that the supply connections to the motor will be reversed, plugging it and then causing it to rotate anti-clockwise.

That will cause LS1 to open, but since K1-7 and 8 will keep K1's coil energized after LS1 opens, K1 will be latched and the motor will continue to run.

Some time later the motor will cause LS2 to be closed, and when it does it'll energize K2, which will cause K2-2 and 3 to close, latching K2.

When K2 and 3 are closed, however, K2-1 and 2 will open, breaking the connection between supply negative and the motor and between supply negative and K1, so the motor will stop and K1 will be de-energized until power is disconnected, LS2 returned to its open state, and power reconnected, starting the cycle anew.