Fanuc 10t lathe control won't reverse the spindle in a tapping program

DMSentra · Apr 10, 2021

Lots of tapping on 3 lathes at my old work, first time on this one.

N30T800G40
N40G50S200M41
N50G97S150M4(FORWARD ON THIS LATHE)
N60G0G54X0T.2T808
N70G1Z-2.F.0625
N80M5
N90G1Z.2M3

stops the spindle and feeds back out. Using a M0 instead stops and freezes the program. Including G97 and S150 in the N90 line changes nothing. No difference with OPT STOP on or off. No difference with SINGLE STOP on or off.
Some code I don't know about that is particular to this control?

Fancuku · Apr 10, 2021

G32 instead of G1 and put the feedrate on the pullout move too.

DMSentra · Apr 10, 2021

Tried adding the feedrate, no go.
Doesn't the G32 have a X pullout for threading? I'm running a tap, not singlepoint threading.

yardbird · Apr 10, 2021

DMSentra said:
Lots of tapping on 3 lathes at my old work, first time on this one.

N30T800G40
N40G50S200M41
N50G97S150M4(FORWARD ON THIS LATHE)
N60G0G54X0T.2T808
N70G1Z-2.F.0625
N80M5
N90G1Z.2M3

stops the spindle and feeds back out. Using a M0 instead stops and freezes the program. Including G97 and S150 in the N90 line changes nothing. No difference with OPT STOP on or off. No difference with SINGLE STOP on or off.
Some code I don't know about that is particular to this control?

Is the T.2 a typo?

No X pull out.

G0 X0 Z.2
G32 Z-2. F.0625
Z.2 M3

Brent

DMSentra · Apr 10, 2021

yardbird said:
Is the T.2 a typo?

No X pull out.

G0 X0 Z.2
G32 Z-2. F.0625
Z.2 M3

Brent

Yes, was supposed to be Z.2, and I didn't include the rest of the program with the Z pullout.
Like I asked before, doesn't G32 include an X pullout to clear the thread when returning to Z start postition?

yardbird · Apr 10, 2021

I'm running a part that gets tapped 1/2-13 now. Fanuc 0i-T control

G0 X0 Z.5
G32 Z-1.35 F.076923
Z.5 M4

Is the exact code I'm using. Only reason I use G32 to tap is because G32 disables the feed and spindle overrides.

Brent

DMSentra · Apr 10, 2021

yardbird said:
I'm running a part that gets tapped 1/2-13 now. Fanuc 0i-T control

G0 X0 Z.5
G32 Z-1.35 F.076923
Z.5 M4

Is the exact code I'm using. Only reason I use G32 to tap is because G32 disables the feed and spindle overrides.

Brent

Gracias. I'll give it to her in the morning and see what she does with it.

sinha · Apr 11, 2021

DMSentra said:
Lots of tapping on 3 lathes at my old work, first time on this one.

N30T800G40
N40G50S200M41
N50G97S150M4(FORWARD ON THIS LATHE)
N60G0G54X0T.2T808
N70G1Z-2.F.0625
N80M5
N90G1Z.2M3

stops the spindle and feeds back out. Using a M0 instead stops and freezes the program. Including G97 and S150 in the N90 line changes nothing. No difference with OPT STOP on or off. No difference with SINGLE STOP on or off.
Some code I don't know about that is particular to this control?

Try M3 followed by G01 in two separate blocks.

DMSentra · Apr 11, 2021

yardbird said:
I'm running a part that gets tapped 1/2-13 now. Fanuc 0i-T control

G0 X0 Z.5
G32 Z-1.35 F.076923
Z.5 M4

Is the exact code I'm using. Only reason I use G32 to tap is because G32 disables the feed and spindle overrides.

Brent

No go. Mine is actually M4 for righthand and M3 for reverse/lefthand, but the spindle continues forward after the turnaround.

angelw · Apr 12, 2021

DMSentra said:
No go. Mine is actually M4 for righthand and M3 for reverse/lefthand, but the spindle continues forward after the turnaround.

What happens if you were to run the following program? Does the spindle alternate in direction?

G97 S500 M04
G04 X1.0
M03
G04 X1.0
/M99
M30

Run it with Block Delete Off until you want to end the program.

Regards,

Bill

DMSentra · Apr 12, 2021

yardbird said:
I'm running a part that gets tapped 1/2-13 now. Fanuc 0i-T control

G0 X0 Z.5
G32 Z-1.35 F.076923
Z.5 M4

Is the exact code I'm using. Only reason I use G32 to tap is because G32 disables the feed and spindle overrides.

Brent

Manual states M3 and M4 can't follow each other without an interupter so I added an M5 line between. Everything stops and won't start again then.

DMSentra · Apr 12, 2021

angelw said:
What happens if you were to run the following program? Does the spindle alternate in direction?

G97 S500 M04
G04 X1.0
M03
G04 X1.0
/M99
M30

Run it with Block Delete Off until you want to end the program.

Regards,

Bill

Continues to run M4 with no changes or movement.

beege · Apr 12, 2021

Does M03 even work? Perhaps you have an aliased M03?

DMSentra · Apr 12, 2021

beege said:
Does M03 even work? Perhaps you have an aliased M03?

Yes, MDI and Bill's program above both run M3.

wmpy · Apr 12, 2021

Is this a live tool lathe? Is there an M-code to select the main spindle rather than the live tool spindle that needs to be commanded?

DMSentra · Apr 12, 2021

wmpy said:
Is this a live tool lathe? Is there an M-code to select the main spindle rather than the live tool spindle that needs to be commanded?

Yes it is live tooling. I've been wondering if C needs to be used to tap on this thing.

wmpy · Apr 12, 2021

You should definitely be able to tap with the main spindle.

I see in the original code you posted that there is a M41. Is that high gear? If so, what happens if you try tapping in low gear? Same deal?

angelw · Apr 13, 2021

DMSentra said:
Continues to run M4 with no changes or movement.

What happens when the following program is executed:
G97 S500 M04
G04 X1.0
M05
G04 X1.0
M03
G04 X1.0
M05
G04 X1.0
/M99
M30

Run it with Block Delete Off until you want to end the program.

Regards,

Bill

sinha · Apr 13, 2021

beege said:
Does M03 even work? Perhaps you have an aliased M03?

Check this.

DMSentra · Apr 14, 2021

sinha said:
Check this.

Yes, mdi and programmed m3 and m4 work. For some reason this forum is dropping some of my posts, I answered this the other day, and answered in another thread this morning that went poof.

Fanuc 10t lathe control won't reverse the spindle in a tapping program

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