It would be nice to add a couple of additional switches to automatically stop the motor when it has gone too far but still allow the operator to return the motor to an allowed position. Below is a simple circuit that should do what you want.
Hubbelldirect Com Products Master Switch Drum Controllers
Dc motor reversing circuit with limit switches. Normally upper and lower are closed but at limits one will open and shuts off motor. Wiring diagram of a dpdt connected motor plus two snap action switches for user control with limit stops. Switch stops motor at limit and diode allows reversing of motor. It doesnt start on its own you have to push a limit switch. When the right limit sw is activated the relay coil is energized reversing the motor direction to the left. The interlocks are specially important because if both relays are on it would be a short circuit.
Diode will allow motor to go in reverse direction. It doesnt have interlocks or a stop button but it can all be added to it. It consists of a dpdt relay two spdt limit switches and 5 diodes. Diode will be reversed biased. The circuit uses 2 relays 2 limit switches and a dc motor. The motor runs to the right with the relay de energized as shown.
This is a minimal reversing circuit.
Gallery of Dc Motor Reversing Circuit With Limit Switches
