GEH-6641E
—————— Function Description ——————
166
Ch.1
1.16.6 Pressure Control for Pumps and Extruders
M
Extruder
Speed reference
E
DRIVE
-10V
+10V
Feed-back
Pressure
setting
Pressure
transducer
Set
Feed-fwd
0... +10V
Figure 1.16.6.1: Pressure Control for Pumps and Extruders
1.16.6.1 Machine Data
Rated speed of the extruder motor Vn = 3000rpm
Pressure transducer 0... +10V
The Drive of the Slave extruder must receive the analog signals referring to the speed reference, to the pressure
transducer and to the potentiometer for the pressure setting (power supplied at its ends with values included
between 0V... -10V) and the digital signals referring to the PID control enabling.
The regulator output is sent to the speed 1 reference.
1.16.6.2 Input/Output
Drive settings: (only those referring to the PID function are described)
Connect to the analog input 1 the pressure transducer.
Select PID fbk src = An inp 1 output
Connect to the analog input 2 the signal for the ramp stage. The output of the ramp stage has to be used as a speed
reference (feed- forward).
Select Ramp ref 1 src = An inp 2 output
Connect as feed- forward the ramp output.
Select PID inp FF src = Ramp out mon
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