Yaskawa J50M Instructions User Manual

Page 37

The plane for making tool radius compensation by

command G41 or G42 is

determined by

G17, G18 or G19. It is not possible to designate
compensation plane including

4th axis of rotary

axis.

The

(G 17) is selected when the power is

turned on.

2.9.11

DESIGNATION BY G CODE

(G20,

Unit of input data are selectively specified by the
following G codes between metric and inch.

Metric

These G codes are programmed at the leading end
of a block of its own. If one of these G codes are
commanded, the units of all the following motions
are changed afterwards.

subsequent programs

. tool offset values

. part of setting parameters

. part of manual movements

displays

Notes :

When G20 or

is commanded, the setting of

inch/metric selection is changed. Therefore,
the state of

at the time of power

on the setting by parameter

DO. “

EXAMPLE

01234 ;

;

Inch input designation

. When

selection is commanded in the

program, take the following procedure before-

hand.

A. When work coordinate system ( G54 to G59)

is used, return it to base coordinate
tern.

B . Cancel all tool compensation command.

(G41 to G48)

Take the following procedure after the command
of G20

selection.

A .

Program absolute zero point

for all axes

before move command.

B .

In principle, make the display reset opera-

tion when current position display ( exter-

nal) is used.

The tool offset values are processed different-
ly in the G20 mode and the

mode.

must be commanded after modifying

the tool offset values.

2.9.12 STORED STROKE LIMIT (G22, G23)

function is for checking the current tool

position during manual or automatic operation

for entry into the prohibited area specified by

parameters or by G22.

If the tool enters a pro-

hibited area, machine operation is stopped and
an. error sign is displayed.

. 1st prohibited area (stored stroke limit 1)

The area outside the area specified by a param-
eter is a prohibited area.

Generally, this can

be used as a substitute of overtravel checking

function.

Upper limit point A and lower limit

point B are specified by parameters.

/ “

/ ’

/ / / / / / / ’

Yb,

‘

Ya,

Fig. 2.25