Rockwell Automation 1771-QDC, D17716.5.86(Passport) PLASTIC MOLDING MODULE - Manual (Page 236)

Tune Your Machine
Chapter 10
10-28
Start Clamp Open Slow Position Setpoint (OPC61)
The QDC module uses this clamp position to guard against running a
clamp-open profile into the open-slow zone. Although you can use it as an
operational setpoint OPC03-B11 = 0 (see discussion of End-of Segment
Position Setpoints below), it purpose is to maintain precision clamp
positioning in regardless of 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 OPC61 by determining the smallest distance required for the
QDC module to safely assume pressure control:
prior to the mold reaching full open position
with the clamp opening at maximum velocity and pressure
By setting this clamp position as stated, you minimize the possibility of
damaging your clamp mechanism that could result from changing
clamp-open velocity, pressure, or position setpoints.
Important: Re-adjust this parameter each time you install a new mold.
Zone Overrun for CPC61 and OPC61
The following summarizes the choices of control action when the QDC
module detects that the clamp passed these positions:
start open slow position (OPC61)
start LPC position (CPC61)
When the clamp
passes this position
The QDC module If you
configured
OPC61 changes to low pressure close CPC03ĆB11 = 0
start openĆslow position stops and zeros outputs CPC03ĆB11 = 1
CPC61 changes to clamp open slow OPC03ĆB11 = 0
start LPC position stops and zeros outputs OPC03ĆB11 = 1
Refer to this title in Injection Tuning Considerations for Producing Parts.
Unselected Valve
SetĆoutput Values