Advanced Poly-Packaging T-300, Руководство по эксплуатации

Страница: 28 / 41

27
4.10 Heater Cartridge Replacement
Since the heater element is a normal wear item, it will require replacement when burned out. Heater
element and heater bar life span may be increased by timely adjustment of PTFE Anti-Stick Sheet. If the
heater bar does not come to temperature fully or does not heat whatsoever, the entire heater bar must be
replaced.
Follow these procedures to replace the element:
1. Remove air from the unit, turn the T-300 power “OFF” and unplug the power cord.
2. Remove four screws from the guard assembly and remove the Lexan guard.
3. Allow the sealer mechanism to cool for at least 30 minutes.
4. Remove the two screws located on the left and right side of the seal bar which hold the seal assembly.
5. Pull one side (right or left side) of the seal assembly out from the front plate. Since the seal assembly is
tight, some maneuvering may be required to remove the assembly from the machine. To avoid damage to
components or wiring, do not force the assembly.
6. Disconnect all wire connectors and remove the complete assembly.
7. Remove gripper plate from heater bar assembly.
8. Unwind and remove PTFE Anti-Stick Sheet from upper and lower rods.
9. Remove screws that hold the support bar cap on both sides.
10. Remove screws from the brace assembly on each side.
11. Pull seal bar away from brace.
12. Cut braided wires so that old heater bar can be removed.
13. Insert new crimp pins into new Molex connectors.
14. Reverse steps 1-11 for re-assembly
15. Reconnect the wire connectors and install the heater bar ensuring that the full rod is positioned
at the top. Secure seal assembly with two screws and mount guard.
4.11 Description of Antijam Circuit
The antijam mechanism decreases the possibility of damage to the T-300 if product or other objects are in
the seal area. The operation of the antijam circuit should be tested prior to production on a daily basis.
Although the antijam unit may also prevent or decrease the opportunity for injuries during the sealing or
heating operation, the antijam is not designed as a safety device. If not adjusted properly, damage may
result from obstructions in the seal area or personal injury may result from fingers or hands being in the
seal area when sealing.
If properly adjusted, a jam is detected when: 1) the rubber pressure strip does not contact the PTFE Anti-
Stick Sheet at one or both sides of the gripper plate or 2) the gripper plate is pressed prior to the rubber
pressure strip contacting the gripper plate.
4.12 Antijam Adjustments / Testing
The antijam mechanism consists of: 1) two cylinder magnetic switches which detects the cylinder
position and 2) two photo sensors that detect the spring-loaded gripper plate. If the antijam circuit is not
functioning properly, follow these procedures to test and/or adjust the antijam components:
Test 1: With air applied and the power on, position an object over 1/4” in thickness on the far-left side of
the seal bar with the object in contact with the gripper plate, but not pressing in the gripper plate. Then
press the foot switch. If the pressure bar retracts, the antijam circuit is working properly.
If the pressure bar does not retract when an obstruction of at least 1/4” in thickness is present anywhere in
the seal area, follow these procedures to adjust and test the circuit:
1. Remove air from the unit, turn the T-300 power “OFF” and unplug the power cord.
2. Remove the top (stainless) cover and side (painted) cover.
3. Locate the two magnetic sensors which are clamped on the end of each seal bar cylinder.
4. Reach under the Lexan guard and manually push the pressure bar inward until rubber strip slightly
touches the gripper plate evenly across the pressure bar but does not press in the springs.
5. Turn the power ON and press the Tech Assist button, then PLC IO button on the touch screen to