Pro-Cut PFM 9.2 - Manual (Page 12)

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MACHINING ROTORS
You must adjust for lateral run-out to eliminate wobble (run-out) from the machine before cutting. This procedure en-
sures the resulting machined rotor will have minimal run-out after cutting. The 9.2DRO Rotor Matching System has been
calibrated to reduce run-out to less than 0.001” or less as measured on the rotor face.
COMPENSATE FOR Run-out
STEP 3: ADJUST FOR LATERAL Run-out (1 Minute)
This procedure will usually take between 10 to 90 seconds. Total adjustment time depends on a number of factors in-
cluding initial run-out and the resistance in the hub. Average adjustment time is less than 30 seconds, but may take up
to 120 seconds depending on vehicle set-up. When the machine is done adjusting, green lights and a displayed lateral
run-out value on the digital display will give feedback on the compensated status of the lathe.
When the machine is done adjusting, a displayed value on the DRO will give feedback on the status of the lathe. To make
the DRO easier to read at a glance, we removed leading zeros and set the output to show whole thousandths to the left of
the decimal point and tenths of a thousandth to the right of the decimal point. For example, a measurement of 0.0015”
/ 38 microns will be displayed on the DRO as 1.5 / 38 microns, or one and a half thousandths. Green lights for “READY
TO CUT” and “OPTIMUM” will also be illuminated as a backup to the DRO.
Detail of the computer box.
The 9.2DRO Rotor Matching System compensates for run-out automatically. With the machine mounted securely
to the adapter and all potential interfering items clear of the rotating assemblies, press the motor on switch. With
the machine running smoothly, wait approximately 8 seconds, then press and hold the start button on the DRO
computer board for 2 seconds. The lateral movement of the lathe as measured at a 12” / 303mm diameter (6”
/152mm from the center of hub) will be displayed on the Digital Read Out (DRO) screen. A clicking sound will be
heard throughout the adjustment process, which is the adjustment solenoid changing the angle (at the adjustment
flange face) until run-out is reduced to within vehicle specification or less.
If the TRY AGAIN light is illuminated, the machine is unable to fully adjust for run-out. This dif-
ficulty could be due to looseness of fittings, irregular run-out, damage to wheel bearings or other
components, or other factors relating to set-up. The best procedure is to loosen the machine from
the adapter, check adapter and vehicle setup, rotate the adapter locator pin 180 degrees, and at-
tach the machine again. Make sure that the machine is adequately supported by the trolley. Run
the adjustment procedure and the machine will again adjust for run-out. If TRY AGAIN appears
repeatedly, there is most often a problem with the vehicle. You should dismount the machine and
check for a damaged wheel bearing or CV joint. Such problems will have to be addressed before
match-machining is possible.
If the machine seems to be having excessive difficulty in adjusting for lateral run-out, consult the
troubleshooting section on Page 33.
MACHINING ROTORS
STEP 3: ADJUST FOR LATERAL Run-out (1 Minute) CONTINUED
DRO computer in READY
mode.
NOTE
DRO computer compen-
sated for lateral run-out to
0.0006” and ready to cut.