
FANUC SERVO AMPLIFIER βi series I/O Link Option
Modification from I/O Link β
EDIT
DRAW. NO. CUST
TITLE
DESCRIPTION
DESIG.
DATE
A-79487E
5
23
01
04.03.15
SHEET
Newly designed
6. Set CMR
In parameter No.032, set coefficient for the command unit from the CNC
system to the servo system.
CMR = Command unit/detection unit
When CMR is from 1 to 48 Setting = CMR x 2
When CMR is from 1/2 to 1/27 Setting = 1/CMR + 100
Usually, CMR = 1. So, set “2” in parameter No.032.
7. Set the number of pulses per revolution
The number of pulses per revolution is calculated with reduction ratios or
leads of the ball screws and detection unit.
(Number of pulses per motor revolution)
= (amount of travel per motor revolution) / (detection unit)
Numerator(number of pulses / rev) = (No.105)(
≤
32767)
Denominator(number of pulses / rev) (No.106)(
≤
32767)
= (No.179)(> 32767)
(No.106)(
≤
32767)
Example: 10um detection in semi-closed loop
Ball screw lead
Number of pulses per revolution
Numerator/denominator
10mm/rev
20mm/rev
30mm/rev
10mm/10um=1000/1
20mm/10um=2000/1
30mm/10um=3000/1
Example:1/100 degree detection with a deceleration ratio of 10:1 for a rotation axis
When motor rotates one revolution, the table turns through 360/10 degrees.
The number of pulses per motor revolution is 360/10 x 100 = 3600 pulses,
so set as the following: Numerator = 3600, Denominator = 1
8. Set the direction of motor travel in parameter No.031.
111 Clockwise as viewed from the pulse coder
-111 Counterclockwise as viewed from the pulse coder