Rockwell Automation 1771-QDC, D17716.5.87(Passport) CLAMP AND EJECT MODE - Manual (Page 192)

Tune Your Machine
Chapter 10
10-19
During normal operation, the only required Clamp End-of Segment
Position Setpoints are a single End-of-Segment Position Setpoint for First
Clamp Close to identify the operational Start Low Pressure Close position
and a single End-of Segment Position Setpoint for First Clamp Open to
identify the operational Start Open Slow position. If additional profile
segments are desired (with the same Unselected Valve Set-output Values),
begin with the 2nd segment of First Clamp Close for clamp close profiles
and the 2nd segment of First Clamp Open for open profiles. Use all of the
segments available in First Clamp Close and First Clamp Open before
utilizing any in Second and Third (unless you require different Unselected
Valve Set-output Values for successive segments).
Realize that any increase in “fast” clamp profile segment velocities or
pressures could affect your clamp’s ability to react similarly when it
reaches the Start Low Pressure Close or Start Open Slow positions. If you
increase a velocity or pressure setpoint in a “fast” clamp close (open)
profile, we recommend that you increase (decrease) the Start Low Pressure
Close (Open Slow) Position, at least temporarily, to assure a successful
Low Pressure Close (Open Slow) and mold closure (opening).
In order to reduce machine cycle time, you do not want to open the clamp
any farther than necessary to successfully eject the part(s). Make sure the
clamp opens enough to allow full ejector advance.
If you are using the same velocity or pressure setpoints on sequential
profile segments, it is better to have a single velocity or pressure
segment for that setpoint.
Clamp Close
Rather than using a profile
with multiple steps at the
same velocity or presure...
Use fewer, longer steps