Valco Cincinnati VC350A, Manual

Page: 88 / 327

Section 10 — Troubleshooting VC350A Flexoseal
®
System
Valco Cincinnati 10-18
Encoder Diagnostics
The parent machine must be operating in order to verify the operation of the encoder. (It is not necessary to be
gluing the product.) All gun-selector switches must be turned off.
Note! Encoder diagnostics should be don only after the internal diagnostics have proven that the main board is
operating properly.
To verify operation of the encoder, follow these steps:
1. Ensure that the “ENC” LEDs (D4 and D11) on the main board are illuminated.
2. If these LEDs are not illuminated, complete either step 3 or step 4:
3. On a shaft-mounted encoder assembly, check for the following:
Worn timing belt or gears*
Incorrect belt tension*
Damaged encoder cable
Loose cable connections
* These items may cause diagnostic LEDs to falsely indicate proper encoder operation.
4. On a wheel-mounted encoder assembly, check for the following:
Worn rubber on the wheel*
Incorrect tension between the wheel and the drive belt*
Damaged encoder cable
Loose cable connections
* These items may cause diagnostic LEDs to falsely indicate proper encoder operation.
5. Replace the encoder if the diagnostics listed above do not solve the problem.
Scanner Diagnostics
The parent machine does not have to be operating in order to verify the operation of the scanner.
Note! Scanner diagnostics should be done only after the internal diagnostics have proven that the main board is
operating properly.
To verify operation of the scanner, follow these steps:
1. Ensure that the red LED on the body of the scanner illuminates when product is detected.
Note! The “SCAN” light LED (D5) on the main board should also illuminate.
2. If the LED on the scanner body does not illuminate, adjust the sensitivity of the scanner:
2a. Verify that the distance from scanner to product is 1-2" (maximum distance can be 4" with increased
error).
2b. Adjust the scanner gain screw so that product is sensed 1" past the normal product location.
3. If the sensitivity adjustment fails to correct the problem, or if the LED on the scanner body is illuminated
but D5 is not, ensure that the scanner cable is not damaged and that there are no loose scanner cable
connections.
Note! The scanner will not operate properly if the bracket is loose on the machine, which causes vibrations
as the product travels.
4. Replace the scanner if the diagnostics listed above do not solve the problem.