Rockwell Automation 1771-QDC, D17716.5.87(Passport) CLAMP AND EJECT MODE - Manual (Page 16)

Overview of the Clamp and Eject Mode
Chapter 1
1-5
Clamp Open
You can open the mold fast with three profiles of the Clamp Open phase:
first open
second open
third open
You may select from these control modes:
velocity vs. position
pressure vs. position
Use Clamp Open to move the platen from the fully closed position (0) to
some position Y at a relatively high velocity or pressure. Y is a position
relatively close to your fully open position (L), yet far enough away to
allow deceleration into Open Slow. This is to increase positioning
accuracy at the full open position (L).
Figure 1.5
Example Clamp Open
Position
Velocity
1st
Open
Profile
2nd
Open
Profile
3rd
Open
Profile
L 0
Clamp
Cylinder
Moving
Platen
Y
Stationary
Platen
Three different open profiles have been provided to allow you to initiate
the following operations between profiles:
drop off the third plate of a mold (on a floating 3-plate mold) or pull
cores
program other events for all valves
either automatically bridge between profiles or allow user programming
to decide when to begin the next profile.
Each of these three profiles is subdivided into three position segments
(shown above each profile in Figure 1.6). 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.