Pressure Jaw And Film Feed Motor Controllers - Sharp SX 1075 Service Maintenance Manual

PRESSURE JAW AND FILM FEED
MOTOR CONTROLLERS
TM
The Sharp SX bagger uses stepper drive
technology to precisely control the movement of
various mechanical systems. This section will
describe how to service the two TM4500 stepper
drive units. These units control the Pressure Jaw
and Film Feed motors.
TESTING
WARNING
Always remove electrical power from the
SX prior to performing any maintenance
on the machine.
1. Remove the four screws holding the Load
Plate, set screws and Load Plate aside (Figure
3-1).
2. Locate the two identical stepper drives inside
TM
the Sharp SX Bagger. The Pressure Jaw
drive is on the left and the Film Feed drive is on
the right (Figure 3-2).
3. Locate the fuse on the defective unit (Figure 3-
3).
4. Set your Digital Volt/Ohm Meter (DVOM) to test
for continuity.
5. With the red probe, make contact with the
metal on one side of the fuse and with the
black probe make contact with the other side of
the fuse (Figure 3-3).
6. If your DVOM indicates that there is no
continuity, replace the fuse.
Note: A blown fuse can be an indication of a
larger problem. If you continue to blow fuses,
test the stepper
connections.
SX™
Service and Maintenance Manual
ELECTRICAL COMPONENTS
motors and power
SECTION 3 – COMPONENT REPAIR
Figure 3-1. Load Plate Screws
Pressure
Jaw
Figure 3-2. TM4500 Drive locations
Figure 3-3. Fuse Probe Locations
3-1
Film
Feed
960714-02B © 2007 I2407