132 Rockwell Automation Publication MOTION-RM002H-EN-P-February 2018
Specifying the gear ratio as a fraction allows the direct implementation of
irrational gear ratios (such as 1/3) with no accumulated positioning errors or
round off. Since the master and slave count values do not use the axis conversion
constants and because they are integers, the actual gear ratio relationship between
the slave and master axes exactly match the specified ratio.
For example, the irrational gear ratio of 1/3 can be equivalently specified as 1 slave
count to 3 master counts, 10 slave counts to 30 master counts, 3 slave counts to 9
master counts.
Clutch
When the Clutch check box is checked, the slave axis accelerates or decelerates to
the speed that it would be moving if it were currently geared to the selected master
axis at the specified gear ratio and direction using a trapezoidal velocity profile
(linear acceleration or deceleration). Once the slave axis has reached the gearing
speed, electronic gearing is automatically activated according to the other
selections. Enter the desired Accel Rate as a percentage of the current configured
maximum acceleration value or directly in the configured user units for
acceleration.
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