COATS 6450 3D - Manual (Page 23)

Important: Always read and follow the information box instructions. • 17
Calibration
Machine Calibration
Important: Use the correct calibration weight amount:
a 4-ounce calibration weight in ounce mode.
Important: The factory default is set for a 4-ounce
calibration weight amount for both ounce and gram
weight measurement modes. Therefore only a 4-ounce
calibration weight is necessary, regardless of weight
measurement mode setting.
Important: Before beginning calibration, be sure the
balancer is in fine balance mode by pressing the SHIFT
key and 6 to toggle to 0.01 oz. display mode; and bal-
ance the tire down below 0.20 oz.
1. It is necessary to machine calibrate at least once in
both Truck and Car modes. Start calibration as follows:
Truck Mode - Hold SHIFT key and press 4 until
both Car Mode and Light Truck LEDs are toggled
off (both lights OFF IS Truck Mode). Then, mount a
R11 22.5 steer tire/wheel assembly on the balancer.
Note: Once both Truck and Car modes are initially cali-
brated, then it is only necessary to calibrate in the mode
that requires calibration. For example, if only truck tires
are balanced on this machine, then only the machine
calibration in Truck Mode is required.
Important: A balanced tire/wheel assembly is required.
Note: Position wheel so that no weights are on
either flange at the top-dead-center location. Turn the
machine OFF then ON.
2. Hold SHIFT key and press 1 to select the CAL
MACHINE mode.
3. Enter the D dimension.
4. Lower the hood and press START.
5. After spin, raise the hood. Attach calibration
weight to the outside flange at top-dead-center.
Figure 20 - Calibration Weight On Outside Flange At Top-Dead-
Center
6. Lower the hood and press START.
Important: It is critical that the inner weight be
placed accurately to achieve proper calibration. If the
calibration weight is not moved from the outside flange
directly across to the inside flange, an inner weight
placement error will occur. To correct, follow the infor-
mation box instructions.
7. After spin, raise the hood. Move and attach the cal-
ibration weight to the inside flange at top-dead-center.
Figure 21 - Calibration Weight Moved (Directly Across) To
Inside Flange
8. Lower the hood and press START.
9. Calibration complete. Press NEXT.
10. After completing the Machine Calibration proce-
dure, the Arm Calibration will automatically initiate.
Arm Calibration
The Arm Calibration procedure begins immediately
after Machine Calibration.
During Machine Calibration, the balancer software
calculates both the A and W dimensions. The Arm Cali-
bration gives the balancer software a reference point
to the edge of the faceplate and home position. When
the user enters the A dimension from the arm rod, it
calculates the difference from the machine calibration
A and uses that as a factor for the manual A entry. Arm
calibration also gives the D dimension a reference point
from home position.
11. Bring the tip edge of the arm precisely to the
outer edge of the faceplate and hold it there while
pressing the NEXT key. (If necessary to reach the
faceplate accurately, loosen the calibration wheel tem-
porarily.)