CEMB USA DWA 1000XLB - Manual (Page 59)

I 0645 60 GB
16 - TESTING THE MEASURING HEADS BY FITTING THEM ON THE VEHICLE
THIS TEST REQUIRES EXTREME ACCURACY . FIRMLY SECURE THE CLAMPS ON THE WHEELS , FIT THE MEASURING HEADS AND
SECURELY TIGHTEN THE CLOSING KNOB . NEVER MOVE THE VEHICLE .
16. 1 - Measurement I – Toe-in and camber in driving direction
Position the vehicle in the measuring position but not above the turn plates and the sliding plates. Engage the
brake pedal lock. Fasten the quick-fastening units. Fit the measuring heads and align them horizontally using
a spirit level. Measure the total toe-in on the front and rear wheels based on the measurement sheet (rows
1-2) and note down the values in column 1. Measure the camber on the front and rear wheels based on the
measurement sheet (rows 3-6) and note down the values in column 1.
16.2 - Measurement II - Toe-in and camber in reverse driving direction
Exchange the front left measuring head with the rear right measuring head, and the front right measuring
head with the rear left measuring head, then horizontally align all the measuring heads using a spirit level
taking care not to move the vehicle. Measure the total toe-in on the front and rear wheels based on the mea-
surement sheet (rows 1-2) and note down the values in column 2. Measure the camber on the front and rear
wheels based on the measurement sheet (rows 3-6) and note down the values in column 2.
16.3 - Evaluation of the values measured during the measuring head test
Column Row Operation
1 and 2 1-2
If there are different signs in the same row, subtract the smaller from the
larger value and note down the result in column 3. Note down the larger
value sign in column 3
If the signs are the same, add the measurement values and note down the
result with the sign in column 3
3-6
If there are different signs in the same row, add the values and note down
the results in column 3. Note down the sign of column 1 in column 3.
If the signs are the same, subtract the smaller from the larger value and
note down the result in column 3. If the larger value is in column 1, the
sign is accepted; if the larger value is in column 2, the sign is changed
Values to compare:
3 1 with 2
If the signs are different, add the measurement values and note down the
result in column 4
If the signs are the same, subtract the smaller from the larger value and
note down the result in column 4
3 with 6
4 with 5
If the signs are different, subtract the smaller from the larger value and
note down the result in column 4
If the signs are the same, add the measurement values and note down the
results in column 4
4
The values in column 4 must be smaller than 3'. If they are larger, it means
that errors occurred during the measurement (e.g. the vehicle or the
quick-fastening units moved) and the measurement must be repeated
3
The values in column 3 must be smaller than 6'. If the differences are
greater, the device must be recalibrated (Technical Service)