A-79595E
Title
Draw
No.
Ed. Date Design Description
Date May.24.’04 esig. Apprv.
20/33
Sheet
FANUC Series 30i-MODEL A
Live Tool Control With Servo Motor
[Least command increment]: Minimum unit of commands issued from
the CNC to the machine
[Detection unit]: Minimum unit for machine position detection
The unit of feedback pulses varies, depending on the type of detector.
[Feedback pulse unit]
= [Amount of travel per rotation of the pulse coder]
/ [Number of pulses per rotation of the pulse coder]
As the size of the reference counter, specify the grid interval for the
reference position
return in the grid method.
[Size of the reference counter] = [Grid interval] / [Detection unit]
[Grid interval] = [Amount of travel per rotation of the pulse coder]
The setting of a command multiplier is as follows:
(1) When command multiplier is 1 to 1/27
Set value = 1 / command multiplier + 100
Valid data range: 101 to 127
(2) When command multiply is 0.5 to 48
Set value = 2×command multiplier
Valid data range: 1 to 96
NOTE
If a feedrate exceeding the feedrate round by the
expression below issued, an incorrect travel amount
may result or a servo alarm may be issued.
Be sure to use a feedrate not exceeding the feedrate
found by the following expression:
Fmax[mm/min]=196602×10
4
×least command
increment / CMR