20.2.28 EXTERNAL DATA INPUT (EDO THROUGH
ED15, EDSA THROUGH EDSD, EDSAO THROUGH
EDSA2, EDCL, EREND AND ESEND) lNPUTS/OUT-
PUTS (Cent’d)
(b) Outputs (2)
D7 D6 D5 D4
D3
D2
D1 DO
TAP M04S TLMO G80S
EREND ESEND RST AL
Externaldata input
end
I
External search end ~
SUPPLEMENTARY EXPLANATION
(1) External Work No. Designation
(a) Input-completion output is not given when work number other
than O
to 9999 is designated or work number is not found. In
this
case, alarmis not given.
(b) Work number input is permitted by external reset operation or at
the time of execution of M02 or M30. After reset operation,
new work number is effective.
(2) External Tool Offset
(a) The offset number to be modified is selected by program
(b) Type of modification is selected by external input
asfollows.
EDAS2=0—Externally inputted data is added
to the stored
value.
EDAS2=l—Extemally inputted data is replaced with the stored
data.
(c) External tool number address is selected by
two bits of external
data select (EDSA-EDSB)
as follows.
EDSA=’’O,” EDASB=’< 1“-H For tool length offset
EDSA=’<1,“ EDASB=’< 1“-D for tool diameter offset
(d) If tool offset number is not selected (H is
set at 00 or D is set at
00),
input-completion signal is given without changing any
offset
value.
(e) The offset value changed by external input is effective with the
block including tool length offset (G43, G44) and tool diameter
offset (G41, G42) command. Tool position offset A (G45
to
G48) is effective with the next block including the command
(G45
to G48).
(f) Axis selection input EDASO, EDAS1 is not required for external
tool offset. If designated, the input is ignored.
(g) The offset amount commanded by external tool offset input is
equivalent to the amount entered by MDI key.
(3) External Work Coordinate System
(a) The shift value commanded by external work coordinate system
shift is equivalent
to the value entered by MDI key.
(b) The shift value commanded by external work coordinate system
shift input is added
to the stored shift value (G54 to G59).
20.2.29 CANNED CYCLE SPINDLE CONTROL
(FMF, FFIN, SSP, SRV, OS, TAP)
FMF — Canned cycle auxiliary signal reading-in
FFIN — Canned cycle auxiliary completion signal
SSP — Spindle stop
SRV — Spindle reverse
TAP — Tapping
Canned cycles can be performed by G74, G84, G86
to G88 com-
mands. At G74 and G84 commands, FMF and SRV are given, and
atG86 to G88 commands, FMF and SSP or stop the spindle.
FMF is turned off when FFIN is sent back
to the control at com-
pletion of spindle reverse or stop.
Turn off signal FFIN when FMF is turned off.
When FFIN signal is stopped, the tool retraction from tapped hole
is started. Signals SRV from tapped hole is started. Signals SRV
and SSP will be turned off when the tool leaves the tapped hole.
Accordingly, reverse the spindle to the forward run. Motion by
G74 and G84 commands, TAP signal is outputted indicating
TAPPING operation. The TAP signal is used to check to see if the
spindle runs at the beginning of tapping.
I
~
d
FFIN
Fig. 20.13 Time Chart of G74, G84
FFIN
Fig. 20.14 Time Chart of G86 through G88
150
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