Rockwell Automation 1771-QDC, D17716.5.86(Passport) PLASTIC MOLDING MODULE - Manual (Page 235)

Tune Your Machine
Chapter 10
10-27
Figure 10.3
Better Control from Fewer and Longer Steps
Clamp Close Profiles
Rather than using a profile with
multiple steps at the same
velocity or pressure...
Use fewer, longer steps
Start Clamp LPC Position Setpoint (CPC61)
The QDC module uses this clamp position as protection against running a
clamp close profile into the mold protection zone. Although you can use it
as an operational setpoint when CPC03-B11 = 0 (see discussion of
End-of-Segment Position Setpoints below), its purpose is to guard against
mold damage resulting from profile entry errors.
Important: This position setpoint should be determined and set only by
qualified personnel, so we do not present it on any Pro-Set 600 screen.
Calculate CPC61 by determining the smallest distance required for the
QDC module to safely assume pressure control:
prior to mating the two mold halves
with the clamp closing at maximum velocity and pressure
By setting this clamp position as stated, you minimize the possibility of
mold damage that could result from changing clamp-close velocity,
pressure, or position setpoints.
ATTENTION: On hydraulic (non-toggle) clamp mechanisms,
re-adjust this parameter to account for mold thickness each time
you install a different mold to guard against damage to the
machine and personal injury.