Rigid Tapping not working right.

Hi, We are new to running a Sharp SV2412 (2004) and are having trouble getting a rigid tapping cycle to work. Here is the code we are using:

T5 (Tap10-32)
M06
T4
M01
G0 G90 X3.016 Y-0.8629 S640 M03
G43 H5 Z0.25
Z0.25
X3.016 Y-0.8629
S640
G84 X3.016 Y-0.8629 Z-0.42 R0.1 F20. P0
G80
G0 Z0.25
X3.016 Y-0.8629
M09
G00 G30 G91 Y0 Z0 M19
M30
%

The machine goes into position, but when the spindle is lowered to tap it does a partial rotation then reverses the partial rotation as it raises the tap. So, it's not rotating fast enough to actually tap the hole. Parameter 5200 bit #0 is set to 1 for rigid tapping. I'm thinking there maybe some other parameter we need to set/change.
Any insight will be greatly appreciated.

Thanks,
David

what is the control

The control is a fanuc oi mate-mb

dave,
it looks like your missing something in the code to tell the machine its a rigid tap. most i have been around have a m or g code. i.e. g84.1

Thanks for the suggestion, but there is a parameter 5200 bit #0 set to 1 that tells the control to rigid tap so it dosn't need an M29. Even if I add an M29 it does the same thing.

Ok, It's finally working. Although I could swear that I tried all combinations, the problem had to do with understand the difference between the G94 and G95.
So, for anyone elses reference his is the code that worked:

T5 (Tap10-32-HSS-TiCN)
M06
T4
M01
G0 G90 X3.016 Y-0.8629 S640 M03
G43 H5 Z0.25
M08G4X3
Z0.25
X3.016 Y-0.8629
G84 G94 S640 X3.016 Y-0.8629 Z-0.42 R0.1 F20. P0
G80
G0 Z0.25
X3.016 Y-0.8629
M09
G00 G30 G91 Y0 Z0 M19
M30
%

I am currently working with a sharp machine. I know what you are talking about with the rotation down then back up. Maybe your machine is setup to use a Q value each time....I'm not sure.
The way i would write it on my machine would be...

M8;
S130 M3;
M29 S130;
G84 Z-0.42 R.1 Q.076 F10.0;
M98 P****;
G0. Z3.0;

So on and so on.
It was really something new to me to have to put the S value into 2 subsequent lines.
That's how I tap. It makes a .076 turn into the part, then retracts very similar to G83.
I would try writing it this way, especially if you have any kind of Fanuc controller.

Quote:

---

Originally Posted by DavidHPI

Ok, It's finally working. Although I could swear that I tried all combinations, the problem had to do with understand the difference between the G94 and G95.
So, for anyone elses reference his is the code that worked:

T5 (Tap10-32-HSS-TiCN)
M06
T4
M01
G0 G90 X3.016 Y-0.8629 S640 M03
G43 H5 Z0.25
M08G4X3
Z0.25
X3.016 Y-0.8629
G84 G94 S640 X3.016 Y-0.8629 Z-0.42 R0.1 F20. P0
G80
G0 Z0.25
X3.016 Y-0.8629
M09
G00 G30 G91 Y0 Z0 M19
M30
%

---

I have a Sharp 2412 2005 model this is how I would write it.
T5 M6 (Tap10-32-HSS-TiCN)
G0 G90 X3.016 Y-0.8629
G43 H5 Z.2 M8
M29S640
G84 Z-.42 F20.
G80
G0 Z3M9
G53 Y0
M30

No need to ad g94 machine boots up in g94 mode.But add it if you feel its safer.
No need for The R in g84 line the machine boots up in g98 mode the tap will retract to the start point .2 but add g98 if you like to.
Using g28 or g30 is old school try g53 this sends the axis home without going into g91 mode.
Use M29 S640 I was told this locks the spindle speed. But it this may not be true.
Also you need an S code in the control before tapping. Meaning the spindle must be turned on
after homing or ridged tapping won't work . Example If you home the machine and try to ridged tap. You will get an alarm no s code . Even if your code is correct. You must start the spindle and then cut it off and it will work or drill the hole before tapping.
Keep it simple
Tim