Motor Control Circuit; Mechanical Operation - GBC Ultima 65 Service Manual

5.3.1
Heater Control Circuit (Continued)
6. Thermal cutoff (TCO1): Provides overheat protection of the heater circuit. Earlier
versions have a resettable type TCO and the current production models have a non-
resettable type TCO. These TCO's should always read a short and will trip when the
TCO reaches a temperature of 248°F (120°C).
WARNING! NEVER OPERATE THE LAMINATOR WITH THE TCO REMOVED FROM THE
HEATER CIRCUIT!
RESULT!

5.3.2 Motor Control Circuit

Power is supplied to the Motor Control Circuit when the RUN button on the Control Panel
PCB (PCB2) is depressed.
Control PCB, 3 amp SLO-BLO fuse and the motor.
1. Control Panel PCB (PCB2): Features all the controls and LED indicators for interface
with the operator and the laminator.
2. Main PCB (PCB1):
components in the machine. Should supply output DC voltage to the motor of 7 - 30
VDC: depending on speed, the faster the speed, the more voltage present.
3. 3 amp SLO-BLO fuse (F1): Overload protection of the motor.
4. Motor (M1): 35 VDC. Motor windings 4.5 - 8 ohms.
5.4

Mechanical Operation

The chain driven lower rollers are powered by the drive motor and the Control Panel PCB (PCB2)
speed selector. During operation the upper heat roller and upper pull roller are clamped tightly
against the respective lower roller by adjustable spring pressure. Both upper heat and pull rollers
are driven under pressure by the lower rollers respectfully. The laminating film is compressed by
both sets of rollers, however, the primary pressure is applied by the pull rollers and the heat rollers
provide only nip pressure. Bronze bushings support the rear rollers and provide smooth even roll
during operation. Roller bearings support the front rollers. The two film webs are stretched tight as
they leave the supply rolls and enter the nip of the heat rollers. Two adjustable brake assemblies
located on the left side frame provide tension. The upper and lower brake assemblies restrict or
"drag" the respective supply roll shafts as the shafts revolve.
5.0 TROUBLESHOOTING
DAMAGE TO THE LAMINATOR AND A FIRE HAZARD MAY
This circuit is comprised of the Control Panel PCB, Main
Main control board responsible for the control of all electrical
5-3