Omron SMARTSTEP 2 SERIES User Manual

5-9
5-5 Electronic Gear
5
Operating Functions
5-5 Electronic Gear
 The Servomotor can be rotated for the number of pulses obtained by multiplying the command
pulses by the electronic gear ratio.
 This function is effective in the following cases:
When fine-tuning the position and speed of two lines that are to be synchronous.
When using a position controller with a low command pulse frequency.
When you want to set the machine travel distance per pulse, to 0.01 mm for example.
Parameters Requiring Settings
*1. The Electronic Gear Switch Input (GESEL) is used to switch between Electronic Gear Ratio
Numerator 1 (Pn46) and Electronic Gear Ratio Numerator 2 (Pn47).
Operation
Calculation Method
 The following equation shows the relation between the number of internal command pulses (F)
after the electronic gear ratio multiplication and the number of command pulses (f) per Servomotor
rotation.
 The Servomotor has a 2,500 pulses/rotation encoder. Therefore, the number of internal command
pulses (F) in the Servo Drive is 10,000 pulses/rotation (2,500 pulses/rotation × 4).
 Given the conditions above, the relation between the number of command pulses per Servomotor
rotation (f) and the electronic gear ratio is as follows:
Parameter
No.
Parameter name Explanation Reference
Pn46
Electronic Gear
Ratio Numerator 1
*1
Set the pulse rate for command pulses and Servomotor travel dis-
tance.
The maximum value of the calculated numerator is 2,621,440.
Any higher setting than this will be invalid, and the numerator will
be 2,621,440.
Page 5-50
Pn47
Electronic Gear
Ratio Numerator 2
*1
Pn4A
Electronic Gear
Ratio Numerator
Exponent
Page 5-51
Pn4B
Electronic Gear
Ratio
Denominator
Electronic Gear Ratio Denominator
(
Pn4B
)
x 2
Electronic Gear Ratio Numerator Exponent (Pn4A)
Electronic Gear Ratio Numerator 1 (Pn46)
or
Electronic Gear Ratio Numerator 2 (Pn47)
F = f ×
Pn4B
Pn46 × 2
Pn4A
=
Pn4B
Pn46 × 2
Pn4A
F
f
10000
f
=
()
=
Encoder resolution (by a factor of 4)
Number of command pulses for Servomotor rotation

Omron SMARTSTEP 2 SERIES Specifications

General

Brand	Omron
Model	SMARTSTEP 2 SERIES
Category	DC Drives
Language	English