YASKAWA yasnac i80m Instruction Manual page 119

©
When switching
between G20
and G2I
can be instructed in the middle of the
program, the
following processing
must
be
accomplished in advance:
•
If
any
work coordinate
system
(G54
to
G59) is being used,
return
it
to
the reference
co¬
ordinate
system.
•
Cancel all tool offsets (G41
to
G48).
© After
switching between G20 and G21 is instructed, perform the following processing:
•
Set coordinate
systems
(G92) for all
axes
before instructing
a move
command.
•
If work coordinate
system
display and external coordinate value display
are to
be used,
clear the
current
value
to
zero.
©
The tool offset
quantities stored in
memory are
handled differently in the G2U and G21 modes.
Issue the G20/G21 command after correcting the offset quantities.
I
Table 2.8.4
Tool
Offset Quantities in G20 and G21 Commands
Stored offset
quantity
G2il (inch) mode G2I
(mm)
mode
rÿ.Mii-SS
in
1 F.dliOO 1
no.
Him mm
-
95
-