Rockwell Automation 1771-QDC, D17716.5.87(Passport) CLAMP AND EJECT MODE - Manual (Page 172)

Span Your Clamp and Ejector Valves
Chapter 9
9-36
Test Your Ejector Velocity Valve(s) for Linearity
1. Select velocity vs. position control for the Ejector profile by
EPC03-B00 = 0 (Pro-Set 600 address B39/160).
2. Select velocity setpoints for Ejector Advance and Ejector Retract that
are typical of the velocities you would run during normal machine
operation. Enter these setpoints into EPC09 and EPC33 (Pro-Set 600
addresses N45:125 and N45:149).
3. Download changes to the QDC module (refer to chapter 4 for detailed
instructions).
4. Jog your ejector to the fully retracted position.
5. 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
6. Upon completion of the Ejector profile, observe the velocities
reported back for Ejector Advance and Ejector Retract segments 1
(EPS09, Pro-Set 600 address N45:181, and EPS33, Pro-Set 600
address N45:205). These velocities should be relatively close to the
setpoints you entered in EPC09 and EPC33 (Pro-Set 600 addresses
N45:125, N45:149). If the oberved velocities are not within 25% of
the setpoints:
- Verify you chose the correct values from your flow rate curves
supplied by your flow valve manufacturer
- Verify your calculations
If the actual velocities are still not representative of your setpoints, your
flow valve is not linear over the range of your setpoints.
If: And Your Selected
Valve is:
Then:
EPS09 was less than EPC09 Direct Acting Increase EAC48 by 5%
Reverse Acting Decrease EAC48 5%
EPS09 was more than EPC09 Direct Acting Decrease EAC48 5%
Reverse Acting Increase EAC48 by 5%
EPS33 was less than EPC33 Direct Acting Increase ERC48 by 5%
Reverse Acting Decrease ERC48 5%
EPS33 was more than EPC33 Direct Acting Decrease ERC48 5%
Reverse Acting Increase ERC48 by 5%
Repeat steps 3 through 6 as necessary.