FlexSeam Dispensing System Customer Product Manual.pdf - 第38页

Flexseam Dispensing System 34 Part 1127900_01 E 2019 Nordson Corporation Check the Applicator Heater NOTE: Cordsets for applicators with a platinum sensor are customer‐supplied. Refer to other documentation as needed. 1.…

Flexseam Dispensing System

Part 1127900_01

E 2019 Nordson Corporation

Problem Possible Cause Corrective Action

4. Bead not obvious Low input air supply Ensure that the input air pressure is

greater than 5 bar (72.5 psi).

Old PUR adhesive in system Clean or replace the nozzle, clean the

adhesive path, and/or replace the

module.

Applicator too cold Adjust the temperature setpoint as

necessary.

Change the lip to a larger size.

5. Bead width changes

on the part

Robot speed inconsistent Check the program speed settings.

Applicator position too high/low Check the program height settings

and/or check the height of the product.

6. No adhesive output Low or no input air supply Ensure that the input air pressure is

greater than 5 bar (72.5 psi).

No signal from robot Test the signal using the robot purge

switch. If the applicator purges, the

problem is in the robot. Refer to the robot

product manual to troubleshoot the

robot. If the applicator does not purge,

check the setup.

Solenoid connection lost Check the red light on the solenoid

valve. If the red light is not illuminated,

replace the solenoid.

Old PUR adhesive in system Clean or replace the lip, clean the

adhesive path, and/or replace the

nozzle.

7. Leaks at bleed hole

on module

Adhesive seal failure Replace the module.

Flexseam Dispensing System

Part 1127900_01

E 2019 Nordson Corporation

Check the Applicator Heater

NOTE: Cordsets for applicators with a platinum sensor are

customer‐supplied. Refer to other documentation as needed.

1. Disconnect and lock out electrical power to the system.

2. Disconnect the applicator cordset.

3. See Figure 13. Use an ohm meter to check the heater resistance and

continuity at the heater pins on the cordset:

S If you measure low resistance, the heaters are operating normally.

Return to the procedure that referenced this check.

S If you measure high resistance or if an open circuit is indicated, there

may be a broken wire, a loose connection, or a defective heater.

Continue to the next step.

Figure 13 Pin positions on the applicator cordset

4. Remove the appropriate cordset connector hood and inspect the heater

wiring. Make sure there are no broken wires or loose connections and

that the heaters are wired correctly.

S If any wiring problems are found, correct the problems and restore the

system to normal operation.

S If no wiring problems are found, the heater is probably defective.

Replace the heater.

Flexseam Dispensing System

Part 1127900_01

E 2019 Nordson Corporation

Check the Applicator RTD

NOTE: Cordsets for applicators with a platinum sensor are

customer‐supplied. Refer to other documentation as needed.

NOTE: You will need to know the temperature of the RTD to properly

perform this check.

1. Disconnect and lock out electrical power to the system.

2. Disconnect the applicator cordset.

3. See Figure 13. With the RTD at a known temperature, use an ohmmeter

to measure the RTD resistance at the RTD pins on the cordset.

4. See Figure 14 for nickel sensors or Figure 15 for platinum sensors, to

determine the correct resistance of the RTD based on its temperature:

S If the measured resistance is correct, the RTD is operating properly.

Return to the procedure that referenced this check.

S If the measured resistance indicates an open circuit, continue to the

next step.

5. Remove the appropriate cordset connector hood and check for loose

RTD wires or wire connections. Tighten any loose connections.

6. Check the RTD resistance again. If the resistance is normal, the RTD is

now operating properly. If it is not, continue to the next step.

7. Disconnect the RTD wires, measure the resistance across them, and

compare the results to Figure 14:

S If the measured resistance is within the appropriate range, reconnect

the RTD wires, reinstall the cordset connector hood, and return to the

procedure that referenced this check.

S If the measured resistance is not within the appropriate range, replace

the RTD.