AV-300i Version 2 User’s Guide
—————— Function Description ——————
Ch.1
155
1.16 APPLICATIONS EXAMPLES FOR THE PID FUNCTION
1.16.1 Control of Nip Rolls with Dancer
M
M
E
E
-10V
+10V
+10V
-10V
Feed-forward
Feed-back
5Kohm
Dancer
Forward
Reverse
Line speed
reference
Forward
Reverse
(Internal ramp
master drive)
DRIVE
DRIVE
Master Nip-roll
Figure 1.16.1.1: Control of Nip Rolls with Dancer
1.16.1.1 Machine Data
Rated speed of the Slave motor Vn = 3000rpm
Slave motor speed corresponding to the max. line speed = 85% Vn = 2550rpm
Maximum dancer correction = +/- 15% of the line speed = +/- 382.5rpm
The Drive of the Slave nip roll has to receive the analog signals referring to the line speed and to the Dancer
position (whose potentiometer will be power supplied at its ends with values included between –10V…+ 10V)
and the digital commands referring to the PID control enabling.
The output of the PID regulator is sent to the speed 1 reference.
1.16.1.2 Input/Output
Drive settings: (only those referring to the PID function are described)
Connect to the analog input 1 the dancer cursor.
Select PID fbk src = An inp 1 output
Connect to the analog input 2 the line speed reference (feed- forward).
Select PID inp FF src = An inp 2 output
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