
B-63783EN-1/01 1.AXIS CONTROL
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1.12 ELECTRONIC GEAR BOX
Overview
This function rotates a workpiece in synchronization with a rotating
tool, or moves a tool in synchronization with a rotating workpiece to
enable the highly precise machining of gears and screws. The rate of
synchronization can be specified by a program. Up to two sets of
synchronous axes can be specified. With this function, in a gear
grinder, one axis serves as an axis for rotating the workpiece in
synchronization with a tool, while the other axis serves as an axis for
moving a dressing axis in synchronization with the tool.
The electronic gear box is hereinafter called an EGB function.
For examples of using the parameters for setting electronic gear box
axis configurations, see Section 1.5.3.
1.12.1 Command Description (G80.5, G81.5)
Format
G81.5
þ
þþ
þ
ý
ýý
ý
ü
üü
ü
î
îî
î
í
íí
í
ì
ìì
ì
p P
t T
þ
ý
ü
î
í
ì
β
β
lL 0
j
; Synchronization starts
Master-axis travel Slave-axis travel
G80.5 β
ββ
β0 ; Synchronization ends
Explanation
- Master axis and slave axis
A synchronization reference axis is called a master axis, and an axis on
which movement is made in synchronization with that on the master
axis is called a slave axis. On a hobbing machine, for example, in
which a workpiece moves in synchronization with a rotating tool, a tool
axis is called a master axis and a workpiece axis is called a slave axis.
The axes which serve as the master axis and slave axis depend on the
structure of the machine tool.
- Synchronization start
When the ratio of the master-axis travel to the slave-axis travel is
specified, synchronization starts.
Specify the master-axis travel in either of the following ways.
1. Master-axis speed
T t: Master-axis speed(1≤ t ≤1000)
2. Master-axis pulse count
P p : Master-axis pulse count(1≤p≤999999999)
Specify a pulse count on the condition that four pulses
correspond to one period in the A and B phases.