Rockwell Automation 1771-QDC, D17716.5.87(Passport) CLAMP AND EJECT MODE - Manual (Page 168)

Span Your Clamp and Ejector Valves
Chapter 9
9-32
Test Your Ejector Pressure Valve(s) for Linearity
1. Select pressure setpoints for Ejector Advance and Ejector Retract that
are typical of the pressures you would run during normal machine
operation. Enter these setpoints into EPC10 and EPC34 (Pro-Set 600
addresses N45:126 and N45:150).
2. Download changes to the QDC module (refer to chapter 4 for detailed
instructions).
3. Jog your ejector to the fully retracted position.
4. Enable the Ejector Profile (DYC02-B14, Pro-Set 600 address
B35/414). The ejector should move through its advance and retract
stroke. If no motion is observed, check the following:
- Verify that none of your clamp or ejector overtravel alarms are set.
The QDC module inhibits ejector profiles if SYS07-B00 through
SYS07-B05 are set
- Verify that no programming error codes exist in SYS61 and
SYS62
5. Upon completion of the Ejector Profile, observe the pressures
reported back for Ejector Advance and Ejector Retract segment 1
(EPS10, Pro-Set 600 address N45:182, and EPS34, Pro-Set 600
address N45:206). If the observed pressures are not approximately
equal to the setpoints entered in EPC10 and EPC34, then check:
- Was your valve and solenoid alignment the same for Ejector
profile execution and Ejector action in set-output?
If the observed pressures (EPS10 and EPS34) are still not representative of
the setpoints (within 20% of EPC10 and EPC34), your pressure valve is
not linear over the desired range of operation.
If: And Your Selected
Valve is:
Then:
EPS10 was less than EPC10 Direct Acting Increase EAC44 by 5%
Reverse Acting Decrease EAC44 5%
EPS10 was more than EPC10 Direct Acting Decrease EAC44 5%
Reverse Acting Increase EAC44 by 5%
EPS34 was less than EPC34 Direct Acting Increase ERC44 by 5%
Reverse Acting Decrease ERC44 5%
EPS34 was more than EPC34 Direct Acting Decrease ERC44 5%
Reverse Acting Increase ERC44 by 5%
Repeat steps 2 through 5 as necessary.