[slijin]

Originally Posted by Ether

You'll probably get useful answers faster if you post your code.

Describing your setup as well would probably help.

In pseudocode, it would be something like:

direction = forward
toggle_prev = false


loop:
   if report_state(limit_switch_1):
      stop(motor)
      direction = backward

   if report_state(limit_switch_2):
      stop(motor)
      direction = forward

   if report_state(toggle) != toggle_prev:
      if report_state(limit_switch_1) or report_state(limit_switch_2):
         set(motor, direction)
         ## Keep in mind this will only work if set() is a state function
         ## (that is, if set() doesn't have to be looped to keep the motor running())
      elif report_state(motor) == running:
         stop(motor)
      toggle_prev = report_state(toggle)
   
   delay 100

The last delay statement is crucial. Here's why: You start from the center, hit the toggle to move forward, hit a limit switch, stopping the motor Then you hit the toggle again to run it backwards, but if the loop runs fast enough, the limit switch will still be triggered, stopping the motor again and reversing the direction. As a result, you'll be left oscillating at that limit switch. The delay lets the motor run long enough so that the limit switch doesn't stay triggered when the loop repeats.