[artin5]

Hello,
Our 1997 takumi seiki V8a vertical cnc mill has the rigid tapping option. We used to do alot of tapping with it. I tried writing a tapping code for it recently, but it seems i have forgotten the proper format. It's still a G84 command but i believe there was an "E" in the code line for the thread pitch maybe? Any suggestions?

thx

[dcoupar]

What control?

Are you getting an alarm? If so, which one? Please post the code you are having problems with.

With rigid tapping, some machines need an M29 in the block just before the G84 block. Some controls allow you to use F for feedrate and E for pitch.

[Bend]

Takumi (mitsubishi Control)

L100 (MANUAL TAP PROGRAM)
G90
G17
X## Y## M01
G92 Z0
S### Z7.
G84 Z-1.0 R.1 F(PITCH)
G80
M30
%


INCH Feed Pitch

1/4-20 200 0.05
5/16-18 180 0.056
3/8-16 160 0.063
1/2-13 130 0.077
5/8-11 110 0.091
3/4-10 100 0.1
1.0-8 80 0.125

METRIC COURSE

M6 x 1 254 0.039
M8 x 1.25 203 0.049
M10 x 1.5 169 0.059
M12 x 1.75 145 0.069
M14 x 2 127 0.079
M16 x 2 127 0.079
M20 x 2.5 101 0.099

[sinha_nsit]

Rigid tapping with parameter setting
This is one of the methods of using rigid tapping. There is a
parameter which can be used to select between the standard
mode and the rigid mode of the tapping cycles (provided the
machine is capable of doing rigid tapping). On Fanuc 0i control,
set parameter 5200#0 (meaning the rightmost bit of parameter
number 5200) to 1, for the rigid mode. If the assigned value is 0,
the tapping cycles would run in the standard mode. Though
spindle start (M03/M04) need not be commanded in the rigid
mode, the spindle speed (i.e., an S-word, say, S1000) must be
commanded in some block, before the tapping block. Note that
relatively high RPM can be used in the rigid mode.

Rigid tapping with M29
Specify M29 S1000 (if 1000 RPM is desired) immediately before
commanding G74/G84. This will run the tapping cycles in the
rigid mode. It is also allowed to command M29 and G74/G84 in
the same block. And, the S-word need not necessarily be coupled
with M29; it can be commanded in some previous block also,
though it is a usual practice to keep them together. The rigid
tapping mode ends with G80. For a subsequent rigid tapping,
M29 must be specified again; otherwise standard tapping mode
will be used.

Rigid tapping with G74.2/G84.2
On certain control versions, G74.2/G84.2 can be used for
left-hand/right-hand rigid tapping. No parameter setting or M29
is needed. However, S-word must be commanded in some previous
block.

[JapieK]

G84.1 and give a G code for F/rnd