Rockwell Automation 1771-QDC, D17716.5.86(Passport) PLASTIC MOLDING MODULE - Manual (Page 220)

Tune Your Machine
Chapter 10
10-12
EndĆofĆsegment Position Setpoints
Shot size is subdivided into profile segments, the lengths of which are
determined by your end-of-segment position setpoints. Each segment has
its velocity or pressure setpoint for controlling the ram (screw).
Important: Avoid multiple adjacent segments having the same velocity or
pressure setpoint. For better control, use a constant velocity or pressure
over a single equivalent length segment.
For injection velocity or pressure profiles, you must always program one
final velocity or pressure setpoint without an associated end-of-position
setpoint that the QDC module uses until it reaches transition (for injection)
or 100% shot size (for plastication).
Time Setpoints
Time setpoints define the duration of each profile segment that applies
pressure to the ram (screw).
Important: Avoid multiple adjacent segments having the same pressure
setpoint. For better control, use a constant pressure over a single
equivalent time segment.
For injection or plastication pressure profiles, you must always program
one final pressure setpoint without an associated time setpoint that the
QDC module uses until it reaches transition (for injection) or 100% shot
size (for plastication).