Shihlin electric SDP Series, Manual

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Calculation of E-Gear ratio :
Before calculating the E-Gear ratio, the user must know the specifications of the system, such
as the resolution of the motor encoder is 22bit Pulse/rev, the deceleration ratio of the
mechanism, the E-Gear ratio and so on.
The E-Gear ratio calculation is as follows:
If there is a deceleration ratio between the motor and the loads, you must multiply the
deceleration ratio to it, which is revolution number of motor shaft / revolution number of load
shaft.
The following is an example to illustrate how to set the E-Gear ratio.
From the figure above, it shows that the load (ball screw rod) has a moving distance of 1mm
per revolution, and the motor resolution is 22-bit Pulse/rev. if you want the load axis to rotate
5µm distance, the calculation is as below.
Electronic gear ratio = 4194304 / 200
From which, it can be known that when the numerator of the E-Gear ratio is set to 4194304,
the denominator is set to 200. and the ball screw rod will be shifted a 5-µm distance after a
position pulse command.
6.4.5 Torque limit of position loop
Same as section 6.3.4.
user by entered shifted be to pulses Distance / (angle) revolution per distance (Load
encoder motor of Resolution
ratio gear - E
=