[Behnod]

Hi everyone

I Need an urgent help with my OM control in rigid tapping Mode (G84) .

the problem is that z axis comes down to the position (R point) and spindle orients itself but it hangs there with no alarm .

the spindle rotation cw/ccw lights on the panel sequentially turn on and off .but no rotation unless i stimulate the spindle head manually .

if i do that it starts rigid tapping according to my program .

My program is:

G90 G17 G54
S200 M3
G00 G43 X0.0 Y0.0 Z100.0 H1
M29 S500 F200
G84 Z0.0 R150.0 P300 F200
G80 P0
M30

Any help would be really appreciated

[email protected]


Regards

[Heavy_Metal]

Hi,

This is an example from my YCM with Fanuc 21i-M.
Check your manual at pages 165 and 166 for rigid tapping, ( Fanuc 0M - Operators Manual - GFZ-61404)
Some codes are not functional for your control, line N020 and N025 maybe.

O400 ( RIGID TAPPING M8X1.25)
N010 G54 G17 G40 G80 G94
N015 G00 G91 G28 Z0
N020 G90 G49
N025 G10 L91 R4.
N030 T01
N035 M06
N040 G95 ( MM/REV )
N045 S650 M03
N050 /M08
N055
N060 G00 G90 G43 X50. Y0 Z20. H01
N065 M29 S650
N070 G84 R5. Z-20. F1.25
N075 X0 Y50.
N080 X-50. Y0
N085 X0 Y-50.
N090 G80
N095 G94 ( MM/MIN )
N100 G00 G90 Z100. M09
N105 G28 G80 G91 Y0 Z0 M05
N110 M30

Regards,
Heavy_Metal

[WILLIAMPROGRAMR]

you will have problems if you start spindle rotation at 200 rpm and tell it to calculate rigid tapping at 500 rpm

[Superman]

G90 G17 G54
S200 M3
G00 G43 X0.0 Y0.0 Z100.0 H1
M29 S500 F200
G84 Z0.0 R150.0 P300 F200
G80 P0
M30

Re-hash of your code

G54
G0 G17 G40 G90 G94 ( better safety line )
S200 M3
G00 X0.0 Y0.0
G43 Z100.0 H1
M29 S500
G95  (feed per rev, )
G98 G84 Z0.0 R150.0 F0.4 (G98/G99 required for return to retract (or initial) Zplane, check manual)
G80 G94 (cancel cycle, feed per min)
M30

used G95 so that F can be the thread pitch, & will not need altering if the RPM is changed
.........NOTE..... G94 is required to switch back to normal machine that won't seem like everything is in rapid
XYZ first move broken up to eliminate 3 axis move (crash fodder)
F200 may need decimal for mm instead of microns
P300 dwell not required, ( may cause program stoppage )
P0 deleted, not needed with G80 ( may cause program stoppage )

[Behnod]

Dear Superman
I tried your recommended program , put decimal in feed and deleted P300 and P0 , but again it didn't do tapping until i rotate the spindle by hand .

[Behnod]

Thanks william
i changed the program to :

G90 G17 G54
S500 M3
G00 G43 X0.0 Y0.0 Z100.0 H1
M29 S500 F200
G84 Z0.0 R150.0 P300 F200
G80 P0
M30

But it hangs again .
i think there is a problem with a parameter or hardware . but the case is that there is no problem with machine . it does everything well . the only problem i face is with Rigid tapping .

[Behnod]

dear Heavy_Metal
i checked the manual but couldn't find anything special . the saple program is:

M29 S**
G84 Z**R**Q**F**
G80

[Heavy_Metal]

Hi,

Did you check my program?
Why is your R150. value bigger than the Z100. in the 3rd line?


G90 G17 G54
S200 M3
G00 G43 X0.0 Y0.0 Z100.0 H1
M29 S500 F200
G84 Z0.0 R150.0 P300 F200
G80 P0
M30

Regards,
Heavy_Metal

[Behnod]

Thank guys for your kind and quick replies .

we used to use this program for rigid tapping before . but an electrical defect caused parameters lost . we restored the parameters and now everything work well except rigid tapping.
i think the program needs a signal or waiting for a command to do rigid tapping .

the parameters related for tapping on OM .

19#4 =1 signal 135 or 123
256=29 M code
911#2=0 rigid tapping


do you think there may be a problem with a parameter or hardware ?



regards

[Behnod]

Sorry Heavy_Metal it's just typing mistake
the first Z is Z200.0

[Heavy_Metal]

Hi,

I attached the Fanuc pdf Parameter Manual GFZ-61410.
Search for "rigid" and you'll see that there are a lot of parameters for rigid tapping.
Maybe you have to change some other parameters.

Regards,
Heavy_Metal

[diamond.3211]

Is there really a need for the S200 M3 before the tap cycle?

When we do rigid tapping the output is as follows, with just the M29 and spindle speed wanted? Maybe the two spindle commands are hanging it up.

G0 G90 G54 X3. Y1.5
G43 Z2. H19 M8
M29 S1300
G84 G98 Z-.75 R.1 F100.
Y.5
X12.25
Y1.5
X21.5
Y.5
G80
G0 Z2.
M5

[Behnod]

Thanks diamond
i have tried both with S200 M3 command and without S200 M3 .
there is no movement in Z axis unless giving the spindle a hand .
it comes to R level or initial level ( depending on G98 or G99) and after orienting the spindle hangs there with a small movement in spindle ( like M19 command) , not executing rigid tapping .
after stimulating the spindle it does rigid tapping accordingly .

[Lomach]

Hi

Have you tried putting m19 before the cycle. I had to do this on an O-Mate control I used to run.

EG

M19
M29 S500
G84 etc

Hope this helps

[Behnod]

Sorry for delay .

Thanks my friends for your kind replies and suggestions .

Up to now I tried so many ways including your suggestions to solve rigid tapping problem in my OM but i couldn't .

Do you think there may be a hint that i have missed ?


Regards

[Heavy_Metal]

Hi,

Did you check parameter 076#3 = 1 ( FANUC 0M )

0076#3 - G84RGD - G84 and G74 are not handled as G codes for rigid tapping/are handled as G codes for rigid tapping.

Pages 18 and 19, Fanuc 0M - Parameter Manual GFZ-61410
I send you the pdf files earlier.

Did you try the "normal" G84 tapping without M29 ?
Try it in a free Z-level.

Regards,
Heavy_Metal.

[landslide1]

I have the exact same issue with my fanuc tape drill. it stops and hunts on rigid tapping. unfortunately I have not found a solution.

[Behnod]

Hi.
Heavy_Metal.
Thank you for the files.
I have tried both 76#3=1 and =0 with and without M29 but it's not working .

[bhurts]

I notice that in all the g-code programs you posted the G84 is followed by Z0.0. Try making that Z move a negative value like Z-10.0.

Ben

[Behnod]

Dear Ben

i changed all the zs to minus values but no result.