User guide

Tune Your Machine
Chapter 10
10-26
Important: Fast segment velocities or high segment pressures may cause
the clamp to overshoot the start low pressure close or start open-slow
position. If you increase a velocity or pressure setpoint in a fast clamp
close (or open) movement, we recommend that you increase the distance to
the start LPC position (or decrease the distance to the open-slow position)
at least temporarily to assure a successful low pressure close (or open
slow) movement and mold closure (or opening).
Important: Avoid using the same velocity or pressure setpoint on
sequential segments. For better control, use a single segment of longer
length or duration (figure 10.3).
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 above), 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