Operational Overview
Establishing a Home Reference Position
The second step in setting up a home routine is to select the desired home reference type. The Home Reference parameter selected determines how the Home Reference Position is established. PowerTools Pro allows selection of one of three different Home References: Sensor, Marker, or Sensor and Marker for a Standard Home and Sensor for a One Side Home.
Sensor
Selecting Sensor means the rising edge of the Home Sensor input function is used to establish the home reference position.
Figure 39: Sensor Home Reference Position
Marker (Standard Home only)
Selecting Marker means the rising edge of the motor’s encoder marker channel is used to establish the reference position.
Figure 40: Marker Home Reference Position
Sensor and Marker (Standard Home only)
Selecting Sensor and Marker means the reference position is established using the first marker rising edge after the device sees the rising edge of the Home Sensor input function.
Figure 41: Sensor and Marker Home Reference Position
Accuracy and Repeatability
The amount of accuracy your application requires will determine the Home Reference option you select. Homing to an external sensor only will establish a repeatable home position within 0.0025 revolutions at 3000 RPMs (50 msec sensor capture interval).
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