Rockwell Automation 1771-QDC, D17716.5.85(Passport) MNL. PLASTIC MOLDING MODULE - Manual (Page 115)

Load Initial Profile Values
Chapter 8
8-20
Backpressure Setpoints
(PPC10, 14, 18, 22, 26, 30, 34, 38, 42, 46, and 50)
Use these words when configuring backpressure vs. position or time
profiles. You enter pressure in PSI or Bar. Each setpoint controls the
pressure of its corresponding segment. You may use from 1 to 11 segments
in your profile. The procedures in chapter 9 require all eleven.
Record backpressure setpoints on Worksheet 8-C equal to the maximum
plastication backpressure you would ever expect in the backpressure vs.
position profile for each of the 11 backpressure setpoints listed above.
The valve spanning procedures in chapter 9 require these initial values. For
additional information, refer to the Plastic Molding Module Reference
Manual (publication 1771-6.5.88).
EndĆofĆSegment Position Setpoints
(PPC11, 15, 19, 23, 27, 31, 35, 39, 43, and 47)
Use these words to configure either one of the following profiles:
backpressure vs. position
RPM vs. position
The procedures in chapter 9 require that you use all 10 position setpoints.
Determine end-of-segment position setpoints for your profile as follows:
1. Back up the ram (screw) from the mold end to the shot size position
as read in SYS25 (N40:177). Refer to PPC62 for this value.
2. Divide this length by 11, the maximum number of segments for this
profile. The dividing line for each segment is a multiple of this
division.
For example, if the ram travel distance in step 1 was 11”, the
11-segment profile has dividing lines at 1” intervals. That is,
end-of-segment positions of 1”, 2”, 3”, ... 9” and 10”.
Important: Measure end-of-segment positions from the mold end.
Mold End
PPC11
PPC15
PPC19
Direction of Ram (Screw) Travel
PPC47
Seg 1 Seg 2 Seg 3 Seg 4 Seg 10 Seg 11
PPC62
3. Record your end-of-segment position setpoints on Worksheet 8-C.