TECO JSDG2S Series - Page 181

5-56
Electronic gear ratio setting method (1) – Directly set the number of pulse command for a
single rotation
1. Understand the overall system specifications
Obtain the System Specification first in order to determine the Electronic Gear Ratio, such as:
Reduction Ratio, Gear Ratio, the quantity of movement for one revolution of the Load Axis, and the
diameter of Roller. Please refer to "1-1-2 Confirmation of Servo Motor Model".
2. Define One Pulse Command Moving Distance
Define the distance that the Transmission Device will move when the Supervisory Controller
issues a Pulse Command. For example: when one pulse commands to move 1um
3. Calculate Single Rotation Pulse Command
 If the deceleration ratio between the Motor and the Load Shaft is
m
n
(m refers to the number of
Motor rotations and n the number of Load Shaft rotations), single-rotation Pulse Command will be
calculated according to the following formula.
SingleRotationPulseCommand 
Thedistanceoftheloadmovement
byonerevolutionoftheLoadShaft
OnePulseCommandMovingDistance



Directly input the number of Single Rotation Pulse Commands to Pn354 Single Rotation Pulse
Command Function
Pn354 Single Rotation Pulse Command Function
Initial Value Unit Setting Range Effective RS-485 Address
0 pulse
Determined by the Encoder
0 ~ 10000: 2500ppr encoder
0 ~ 32768: 15bit encoder
0 ~ 131072: 17bit encoder
0 ~ 8388608: 23bit encoder
Note: 0 ~ 63 means not use
Power Re-set 0342H/0343H
Setting Description:
External Pulse mode: The pulse command required by one motor revolution. When set as a value
≥64, Single pulse command function activates and Pn302~Pn306 E-Cam ratio
function becomes invalid.
Interal Position mode: The magnification of the internal position command movement. When set as a
value ≥64, Internal position command magnification activates and
Pn302~Pn306 E-Cam ratio function becomes invalid.