I have a car that is slowing and approaching fine, but doesn't stop level. It's overshooting about 1/2 to 5/8 inch in both directions. Every once in a while it stops level. I've checked compounding. Up and down speed are within 3fpm. I've replaced optics 2LR, and LD. Sensors seem to be working good. Car just doesn't stop until plate breaks the opposing leveling sensor. I.e. - on a down run, they car levels down slightly past floor level ubtil its close to or at the LU optic sensor. If i tighten the zone, car still overshoots, then relevels. Any ideas?
Does this unit use the selector cable attached to the cross head? If memory serves me correctly, too loose on the spring tensioner will cause goofy floor levels. Relay 14 will mess with leveling also. Location is normally near the bottom of the controller (back side?) to the right.
Stopping high going up and stopping low coming down is probably electrical. Check the following:
1. Make sure RE relays remain picked all the way in to the floor, to the point your selector runs off the LU or LD sensor.
2. Make sure CFC relay picks up for about 2 seconds after selector runs off the LU or LD sensor.
3. Generator been worked on lately? Possible that the compensating field is in backwards. Swap D1F and D2F wires to the generator on the back of the controller. You should see the situation either get better or get worse.
4. Check to see that the LU and LD sensors drop off the sensor about 1 mark on the dial from floor level. Possible that they selector is remaining on the sensor too long.
5, Does the car make a smooth approach into the floor, up and down, no hesitation six or so inches from the floor?
Just some thoughts
Always nice to hear the outcome of troubles we have.
Thanks for posting.
Stopping high going up and stopping low coming down is probably electrical. Check the following:
1. Make sure RE relays remain picked all the way in to the floor, to the point your selector runs off the LU or LD sensor.
2. Make sure CFC relay picks up for about 2 seconds after selector runs off the LU or LD sensor.
3. Generator been worked on lately? Possible that the compensating field is in backwards. Swap D1F and D2F wires to the generator on the back of the controller. You should see the situation either get better or get worse.
4. Check to see that the LU and LD sensors drop off the sensor about 1 mark on the dial from floor level. Possible that they selector is remaining on the sensor too long.
5, Does the car make a smooth approach into the floor, up and down, no hesitation six or so inches from the floor?
Just some thoughts
very good line of approach to this problem