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12.
Glossary of Terms and Concepts
12.1. Electronic Gear
The electronic gear function enables the servomotor travel distance per
input reference pulse to be set to any value. It allows the pulses generated
by the host controller to be used for control without having to consider the
equipment gear ratio or the number of encoder pulses.
This is done by setting the Electronic Gear Ratio, which is the ratio of the
number of pulses that are input to the XtraDrive control algorithm to the
number of reference input pulses received from the host controller. The
user position units can then be set in terms of the pulses that are input to
the XtraDrive control algorithm.
Figure 59: Illustration of Gear Function
12.1.1. Electronic Gear Parameters
The electronic gear ratio, B/A, is ratio of the number of pulses received by
the XtraDrive from the master or host, to the number of pulses seen by the
motor.
♦ Pn200 specifies the form of the reference input pulse.
♦ Pn202 is the numerator of the electronic gain ratio, B.
♦ Pn203 is the denominator of the electronic gain ratio, A.
It is recommended that the master used should have a higher resolution
than the slave.
XtraWare User Manual
Glossary of Terms and Concepts
249
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