[Arturs]

Hello all,

We have 3 months old Hyundai WIA L230LMSA twin spindle turning center with Fanuc 0i Series controller.
The machine itself is great, only there is small problem with learning how to program it using cycles. Because in all Fanuc materials are given their standard version of the cycle programming. But as you know that Hyundai by themselves change these cycles adding some extra comands what is used only for Hyundai machines. Sadly they don't provide their own programming manuals for each machine model.

Now we need to make a thread in part using Main Spindle Rigid tapping cycle.
I got some examples how it must be programmed for Hyundai SKT15/21LMS/LM machines and according to these examples I made my own program.

Below is given my program what i wrote:

O2002 (Rigid tapping for main spindle)
N01 G28 U0. W0.
M40 (M40 - C-axis unconnect)
M140 (A-axis connection OFF)
T1010 (DRILLING)
G97 S2000 M03 (G97 - constant surface speed OFF)
G00 X0. Z10.
Z1.
G01 Z-12. F0.05
G00 Z2.
N02 G28 U0. W0.
T0707 (TAPPING M3X0,5)
G99 (feed per rev.)
G00 X0. Z5.
M122 (Main spindle Center rigid tap mode ON)
G97 S200 M03
M129
G84 X0. Z-10. R5. F0.5
G80
M128
M123 (Main spindle Center rigid tap mode OFF)
G28 U0. W0.
M02; (End of rigid tapping program)

Starting a program in simulation mode the main spindle starts to rotate and hole for thread is drilled without problems. But in moment when is started cycle for main spindle tapping, spindle stops to rotate and tapping tool goes inside in drilled hole. And it’s not correct...

Maybe someone can answer what I'm doing wrong and where is the problem why this program is not working correctly?

I also add attached document with Rigid Tapping examples what i got. Maybe for someone this material may be helpful.

[brendahm]

I am also looking for a solution to the same problem, except we are trying to tap radially. I read on another forum that an M126 is also needed.
"We recently also got our SKT21 LMS with a 0I TC controller. We faced the same problem with rigid tapping. Then we got the advise by KIA to activate rigid tapping with M126 and after that it worked fine."