Rockwell Automation 1771-QDC, D17716.5.86(Passport) PLASTIC MOLDING MODULE - Manual (Page 25)

Overview of Inject and Clamp Mode
Chapter 1
1-13
Figure 1.13
Example Clamp Open
Position
Velocity
1st Open
Profile
2nd Open
Profile
3rd Open
Profile
L 0
Clamp
Cylinder
Moving
Platen
Y
Stationary
Platen
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 of the clamp open profiles 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.