Ran into something new setting up non-derail on one switch. I test the function by rolling a car over the insulated track (by the way if the switch machines are connected to the same ground as the track then track power does not need to be on to test the non-derail function). On both sides the car wheels kept sparking when passing from one track section to the insulated track. My first thought was dirty tracks from soldering the non-derail wire in place. I cleaned both and the problem went away on one side. The other side kept sparking. After some head scratching I noticed the two tracks were slightly off in alignment. I fixed the alignment and no more sparks. Crazy thing this was not a major alignment issue. I added an extra screw to make sure the track did not move again.
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