
EDT
DATE
FANUC Series 16i/18i-MA
Skip function for EGB axis
Specifications
A-77401E
2 / 5
01 98.09.25 Newly registered
DESIG.
DESCRIPTION
TITLE
NO.
PAGE
K.Yasud
E.Genm
02 99.10.29 Page 5/5 was corrected.
1. General
This function provides the capability that skip function or high speed skip function can be
commanded for work axis in the EGB(Electronic Gear Box) synchronization mode.
The features are as follows.
- The program block to enable the function is not interrupted until the total number of
skip signal inputs reaches a value specified in the same block.
- The synchronization by EGB is not stopped by any of skip signal inputs.
- The machine coordinate position of the EGB axis (work axis) at each time of the signal
inputs is stored in one of consecutive custom macro variables. The top number of the
variables is specified in the block.
- The total number of the inputs is stored in another specified variable.
As for the EGB function, see the chapter “1.14 Simple Electric Gear Box” of the
Connection Manual (Functions) B-63003EN-1.
2. Command format
G81 T_ L_ ; (EGB mode on)
G31.8 G91 a0 P_ Q_ R_ ; (EGB skip command)
a: EGB axis (Work axis)
P: The top number of the consecutive custom macro variables in which the machine
coordinate positions of the EGB axis (work axis) at the skip signal inputs are
stored.
Q:The maximum allowable number of the skip signal inputs.
(Range of command value: 1 – 200)
R: The number of the custom macro variable in which the total number of the inputs
is stored.
This data is usually the same as the value specified by Q. Therefore this is not
necessarily specified. Specify it when the total number should be confirmed.
G31.8 is a one-shot G code.
During the execution of the G31.8 block, the machine coordinate positions of the EGB
axis (work axis) at the skip signal inputs are stored in the consecutive custom macro
variables where the top number of the variables is specified by P and the maximum