AMCI SD4840EK, User Manual

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SD4840EK User Manual
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37
Electronic Gearing (continued)
Advanced Ratio Control
The ELGearing Multiplier and Divisor values give you a great deal of control over the ratio of motor turns per
encoder turn, but you can achieve even finer control by adjusting the Motor Steps/Turn parameter.
The Z pulse is not used to correct the encoder position once per turn, so you can actually program the Motor
Steps/Turn to any value you want within its valid range. For example, if your encoder outputs 4,096 pulse per
turn (a 1,024 line encoder) and you set the Motor Steps/Turn parameter to 8,192, you will have built a 2:1
gear down into your system before applying the ELGearing Multiplier and Divisors. (Two rotations of the
encoder = 8,192 counts = 1 motor rotation.)
This technique allows you to set a median gear ratio in your system that you can adjust on-the-fly by using the
ELGearing Multiplier and Divisor parameters.