Table of Contents
Advertisement
LinMot
4.4.2 Stepper motors
Rotate until trigger
Initialization on
actual position
User Manual V1.01
Stepper motors have to be initialized every time they are turned on. As they can only be
operated without a pick-up, their actual position cannot be detected when the rotor is
moved in a non-powered mode (e.g. the operating state Disable).
Stepper motors can be initialized in two different ways:
In order to initialize the motor by means of a trigger signal a digital position sensor is
needed to detect the rotor when it is in the desired zero-position. The rotor rotates in the
specified direction with a user-definable speed over the position sensor. As soon as the
sensor detects the rotor the actual position is saved as the zero-position.
If the trigger signal is already High when the initialization is started, the rotor is first
moved in the opposite direction until the signal goes low. At this point it is moved in the
specified direction to trigger the active edge.
In this case no reference run is executed. The actual position of the rotor upon powerup
of the electronic unit is saved as zero-position. This implies that the rotor must find itself
in the desired zero-position already before powering up the unit.
Design and Installation
4-13
Advertisement
Table of Contents
