Rockwell Automation 1771-QDC, D17716.5.93(Passport) PLASTIC MOLDING MODULE - Manual (Page 24)

Overview of Inject, Clamp, and Eject Mode
Chapter 1
1-12
You may start these operations between the three clamp open profiles:
drop the third plate of a mold (on a floating 3-plate mold) or pull cores
program other events for all valves
automatically bridge between profiles, or let ladder logic decide when to
begin the next profile.
Each clamp open profile can be subdivided into three position segments
(Figure 1.14). You can change clamp velocity or pressure up to three times
in each profile, or up to nine times for the entire clamp open phase.
Figure 1.14
Example Clamp Open Position Segments
Position
Velocity
3rd Open
Profile
2nd Open
Profile
1st Open
Profile
3
3
3
2
2
2
1
1
1
Segments
L 0
Clamp
Cylinder
Moving
Platen
Y
Stationary
Platen
Important: You may use as many or as few profiles and/or segments
within profiles as needed. If using a single open motion, use the first
segment of the 1st open profile. The open slow profile must follow.
After completing the last segment in each profile, the QDC module either
switches immediately to the next programmed segment of the next
programmed profile or waits for a command from your PLC-5 program to
continue.
After completing the last configured open profile, the QDC module either
switches immediately to the first programmed segment of the open slow
profile, or waits for a command from your PLC-5 program to continue.
Open Slow
Use the open slow profile to accurately position the clamp for ejecting the
part(s). You may decelerate clamp motion twice with this profile using up
to two profile segments (Figure 1.15).
You may select from these control modes:
velocity vs. position
pressure vs. position