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John Bean VPI System I Operators Manual
5.0 TIRE MATCHING PROGRAM - F90
Tire matching assists the user in determining the best
possible mating of the tire and rim. The mating of tire
and wheel normally allows the least amount of addi-
tional weight required for balancing and total runout.
The matching program is helpful when:
•
Excessive radial runout is noticed.
•
The balancer calls for weights in excess of 2 oz. on
either plane in the
Dynamic mode.
The VPI System I computer wheel balancer features a
matching program capable of two levels of resolution:
Dynamic, to rotate and reverse the tire on the rim
for optimum rim and tire matching.
Static, when the tire has an ornate sidewall or di-
rectional tread and cannot be reversed on the rim.
INSTRUCTIONS:
1. Press the "F" button dollowed by pressing the
UP or
Down arrow button until the display reads "F" “90”,
release the "F"
button.
When activated the machine displays "--- ACH" for one
second followed by "VAL tOP". This instructs the op-
erator to rotate the wheel so the inflation valve is at 12
o'clock. See
Figure 26. Press "F" to store the valve
position, the display will then read "SPN 1 ".
NOTE: The F button can be pressed more than once,
every time the F button is pressed, the valve position is
remembered by machine as a reference point.
2. Lower the wheel guard to spin the wheel, when the
shaft reaches the balancing speed, the display reads
"ACH 1" accompanied with a short beep.
3. After spinning the shaft brake engages and the dis-
play reads "tur tir" and "CrS tOP" alternatively.
(1) The operator should turn the wheel and mark an X
at the 12 o'clock when the valve is at the 6 o'clock posi-
tion.
Figure 27
(2) Remove the wheel assembly from the balancer and
deflate and rotate the tire on the rim so the valve points
to the cross mark on tire as shown in
Figure 28
4. After inflating the tire and remounting on shaft, press
F Button. The machine displays "VAL tOP" again. Op-
erator should turn the wheel so the valve is at 12 o'clock.
Press the "F" button to program the valve position.
Figure 26 - Step 1, valve top, press "F"
Figure 27 - Step 2, valve at bottom,
mark top of tire with X, press "F"
Figure 28 - Step 3, rotate tire on wheel so the valve and
X mark line up. Rotate assembly to TDC, press "F".
Summary of Contents for VPI System
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