Basic Principles Of Positioning; Fig. 2-1 Principle Of A Positioning Action - Siemens SIMATIC FM 453 Manual

Basic Principles of Positioning

What Is Position- Positioning means moving a load to a defined position within a defined time,
ing? taking all influencing forces and torques into account.
Fig. 2-1
Servo-controlled
Servo-controlled positioning is:
Positioning with
Encoder
Open-loop Con- Positioning with stepper motors is:
trolled
Positioning with
Stepper Motor
FM 453 Servo Drive / Step Drive Positioning Module
C79000-G7076-C453-01
F
Position A
F = driving force x = distance to be traversed
Principle of a Positioning Action
Control of the drive at the right speed while a movement is being per-
formed.
Specifying a target position and true-to-target axis approach into pro-
grammed target position
Acquisition of the actual value at the connected encoder (incremental or
absolute)
Maintaining the axis in position in the face of interfering factors.
For servo motors, the 10 V port is used
For stepper motors, the pulse/direction outputs are used
Control of the drive at the right speed while a movement is being per-
formed.
Specifying a target position and true-to-target axis approach into pro-
grammed target position
Generating the actual value via the pulse/direction signals
s
x
Position B
s = path
2
2-1