Rockwell Automation 1771-QDC, D17716.5.93(Passport) PLASTIC MOLDING MODULE - Manual (Page 27)

Overview of Inject, Clamp, and Eject Mode
Chapter 1
1-15
Other Eject Features
The QDC module gives you the following additional features:
Multiple Cycles – the ability to repeat the ejector cycle a number of
times, changing from advance to retract determined either automatically
or by command from your PLC program
Ejector Forward Dwell - the ability to pause after completing the first or
last advance stroke. Use this feature so a robot can pick off a part when
ejectors are fully extended
Ejector “Tip” Strokes - the ability to shake the part off the ejector. You
may program interim single-segment advance and retract tip strokes that
occur after the first advance stroke and before the last retract stroke
Figure 1.19
Advance, Retract and Tip Strokes
Full
Retract
Full
Advance
Tip Strokes
First Full Advance
Tip Advance
Tip Retract
Last Retract
Ejector Forward Dwell
:
:
Tip Retract
Ejector Forward Dwell
We define system pressure for the Inject, Clamp, and Eject mode as the
pressure continuously detected by the single pressure sensor connected to
the QDC module at input 2. Depending on machine hydraulics, a single
pressure valve may control inject, clamp, and/or eject mode profiles.
ATTENTION: Your control system may not work as expected
with possibly machine damage if you attempt to control a
pressure profile of a phase (inject, clamp, or eject) not
hydraulically plumbed for pressure control.
System Pressure