Siemens SINUMERIK 840C - Manual (Page 709)

09.95 10 Axis and Spindle Installation
10.4 Axis installation
10.4 Axis installation
10.4.1 Drive optimization
10.4.1.1 Checking and setting the control direction of the feed axes
Simplified block diagram of the drive control system
Position
controller
Speed
controller
i
set
n
set
Current
controller
n
act
i
act
Setpoint
position from
the interpolator
Motor Encoder
Actual
position
Before the position control system is put into operation, the speed controller and the current
controller for the drive must be installed and optimized. When the position control system is
installed, the actual position must be checked before the setpoint position is optimized.
The following must be clarified before beginning work:
• Travel direction of the feed axis (as per customer specification or in accordance with the
ISO standard)
• Polarity of the set speed voltage on the control unit for axis movements in a positive
direction (as per customer specification or ascertained by performing a test using a battery
box)
The control direction of the position control system can be influenced via bit 1 of NC MD 564*
(which changes the sign of the setpoint position) and bit 2 of NC MD 564* (which changes the
sign of the actual position) - see flowchart.
© Siemens AG 1992 All Rights Reserved 6FC5197- AA50 10–19
SINUMERIK 840C (IA)