
1.AXIS CONTROL B-63943EN-1/02
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1.10.4 Electronic Gear Box 2 Pair
Overview
The Electronic Gear Box is a function for rotating a workpiece in sync
with a rotating tool, or to move a tool in sync with a rotating
workpiece. With this function, the high-precision machining of gears,
threads, and the like can be implemented. A desired synchronization
ratio can be programmed.
Up to two sets of axes can be synchronized. A gear grinding machine
can be controlled, for instance, by using one axis for rotating the
workpiece in sync with the tool and another axis for performing
dressing in sync with the tool.
The electronic gear box is hereinafter called an EGB function.
1.10.4.1 Specification method (G80.5, G81.5)
Format
G81.5
p P
t T
l L 0
j
β
β
;
Synchronization start
Amount of travel along the master axis Amount of travel
along the slave axis
G80.5 β0 ; Synchronization end
Explanation
- Master axis, slave axis, and dummy axis
The synchronization reference axis is called the master axis, while the
axis along which movement is performed in synchronization with the
master axis is called the slave axis. For example, if the workpiece
moves in synchronization with the rotating tool as in a hobbing
machine, the tool axis is the master axis and the workpiece axis is the
slave axis.
Which axes to become the master and slave axes depends on the
configuration of the machine. For details, refer to the manual issued
by the machine tool builder.
A single servo axis is used exclusively so that digital servo can
directly read the rotation position of the master axis. (This axis is
called the EGB dummy axis.)