GBC Ultima 65 Service Manual page 33

ALTERNATIVE ULTIMA 65 CALIBRATION
CONTINUED
Some P.C. Boards have the trim pot mounted tuner side up. Any reference to clockwise (cw) or
counterclockwise (ccw), applies to tuner side up. On a P.C. Board with trim pots mounted tuner side
down, the directions of rotation are reverse. See Figure 2.
FIGURE 2
Set SV2 fully clockwise. You will hear a faint clicking when you pass fully clockwise. Right at the click,
turn back one full turn rotation counterclockwise. Install P.C. Board into machine and run it on with an
amprobe on the heater circuit wire and a beaded thermocouple in the nip of the heat rollers (or infrared
temperature sensor pointed right on the nip). Heat the laminator until the amprobe registers no pulse
deflection. Temperature will probably be 225° F to 245° F.
Turn SV2 8 TO 10 full rotations counterclockwise and let temperature increase until it has held and
stopped climbing for at least 5 minutes. The amprobe will probably register pulse deflection, showing the
circuit is maintaining temperature. Read the nip temperature, at this point, each full rotation
counterclockwise will increase the nip by 5° F to 10° F. Or if needed, rotation clockwise will decrease the
nip temperature. Do this to reach desired nip temperature.
GBC Lamination Specialist Mike Taylor sent in this Alternative Calibration Procedure.
6-6