149
Drive System Problems that Do Not Display Errors on Lane or Approach
There are a number of things that can go wrong with the Drive System and the Walker will
appear to operate poorly. Most of these problems can be corrected before the machine
fails, but only if the operator is paying close attention.
NOTE: When making changes to how the machine moves and turns, the Lane to Lane
adjustments will also change.
1. When the machine comes out of the lane and onto the approach it drifts to the left or
right.
a. Check gutter adapter blocks to see if they are causing the machine to come out
crooked.
b. The machine could be favoring the left or right side and coming out a little crooked.
c. The 10-pin motor could be running too fast. Adjust the length of the yellow resistance
wire.
2. The machine turns more than (or less than) 90 degrees when turning clockwise or
counter- clockwise.
a. Check the STEP #2 TURN AWAY FROM LANE and STEP #8 TURN TO FACE LANE
adjustment to see if they are set properly for each lane.
b. The 10-pin Approach Sensor is miss-counting allowing it to go beyond 90 degrees.
3. The machine drifts to right or left when traveling to the next lane.
a. The yellow resistance wire needs to be adjusted to balance the motors.
4. The machine will not make a 90 degree turn.
a. The CR1 Directional Relay is not operating.
5. The machine makes more than three whisker strikes when entering the lane.
a.
The whiskers are set too wide and are not giving the machine enough room to
maneuver.
b.
Lane to Lane adjustments have not been fine-tuned.
6. The machine slows down suddenly when down-shifting or stopping
a. The Decel Potentiometer on the drive board needs to be adjusted clockwise.
7. The machine appears not to ramp down to a slower speed just before stopping when
operating on the approach.
a. The Decel Potentiometer on the drive board needs adjusted counter-clockwise.
8. The machine starts very quickly and makes sudden speed changes.
a. The Accel Potentiometer needs adjusted clockwise.
9. The machine starts slowly and may display travel errors.
a. The Accel Potentiometer needs adjusted counter-clockwise.
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