[docdesigns]

Hi all,

Can anyone post an example of a direct tapping piece of code. It has the seicos 21L controller. So far I have been able to use a generic Fanuc post processor for the turning opertaions, however the tapping doesn't work right. It outputs a M29 and G84 which is not recognized by my controller. The lathe in question does not have a c-axis, however seems to have spindle synchronization along with recognizing G63 and G842. My manual notes what G842 is to be used for "direct tapping" with no floating tap head required. However doesn't give me any examples on how to use it or what other codes "M" or "G" need to be used along with it.

Thank you,
Clinton

[shas595]

Clinton - G842 should be right - Not M29

This is coming straight from the Sigma 21L TS15 Programming manual:

T0800 M40
G17
M43
G28 H0
G50 C0
G97 S300 M08
G00 X62.0 Z20.0 M13
G99 G01 Z5.0 F5000
G842 G198 Z−8.0 H60.0 L6 F0.8
G80
G00 Z5.0 M05
M45
G00 X200.0 Z200.0
M01


G842 : Forward direct tapping
G843 : Reverse direct tapping
G198/G199 : Return point
X_/C_ : Hole position (Note 2)
Z_ : Z point position (Note 2)
R_ : R point position
P_ : Dwell time
L_ : No. of repetition
F_ : G98 mode Feed rate of tapping axis
G99 mode Pitch of tap
E_ : No. of thread per inch (Effective at G99 mode only)
S_ : Spindle speed of rotating tool
(Note 1) If number of repetition (L) is omitted, it deems as L=1.
If L=0 is commanded, it moves at hole position but tapping is not
performed.
(Note 2) Command a position of Z point by an axis address of tapping axis.
Command a hole position by an axis address other than tapping axis.
(Note 3) R and Z points and P are mordal during a fixed cycle.

Give it a shot!
John

[docdesigns]

Thanks John. I will give that a try. As always your the man!

Clinton

Clinton - G842 should be right - Not M29

This is coming straight from the Sigma 21L TS15 Programming manual:

T0800 M40
G17
M43
G28 H0
G50 C0
G97 S300 M08
G00 X62.0 Z20.0 M13
G99 G01 Z5.0 F5000
G842 G198 Z−8.0 H60.0 L6 F0.8
G80
G00 Z5.0 M05
M45
G00 X200.0 Z200.0
M01


G842 : Forward direct tapping
G843 : Reverse direct tapping
G198/G199 : Return point
X_/C_ : Hole position (Note 2)
Z_ : Z point position (Note 2)
R_ : R point position
P_ : Dwell time
L_ : No. of repetition
F_ : G98 mode Feed rate of tapping axis
G99 mode Pitch of tap
E_ : No. of thread per inch (Effective at G99 mode only)
S_ : Spindle speed of rotating tool
(Note 1) If number of repetition (L) is omitted, it deems as L=1.
If L=0 is commanded, it moves at hole position but tapping is not
performed.
(Note 2) Command a position of Z point by an axis address of tapping axis.
Command a hole position by an axis address other than tapping axis.
(Note 3) R and Z points and P are mordal during a fixed cycle.

Give it a shot!
John

[docdesigns]

Another thing. I see that this code has a G17 in it. So far I have had to take out any G17 in the code I have tried our else I get an error/alarm saying incorrect plane. Not sure why however everything seems to work fine without it. However I have not tried any center cutting tools like drills yet.

[docdesigns]

John,
I am attempting to work on my post processor to make the code look for like what you posted. However I was wondering if you knew if my machine doesn't have a C-axis like I had stated will the code you posted work? It has two codes G28 H0 and G50 C0 that from what I gather have to do with zeroing the C-axis. I wont be near the machine again until the end of the week to test it myself and don't want to spend a lot of time trying to modify my post processor if the code wont work.

Thank you,
Clinton

Clinton - G842 should be right - Not M29

This is coming straight from the Sigma 21L TS15 Programming manual:

T0800 M40
G17
M43
G28 H0
G50 C0
G97 S300 M08
G00 X62.0 Z20.0 M13
G99 G01 Z5.0 F5000
G842 G198 Z−8.0 H60.0 L6 F0.8
G80
G00 Z5.0 M05
M45
G00 X200.0 Z200.0
M01


G842 : Forward direct tapping
G843 : Reverse direct tapping
G198/G199 : Return point
X_/C_ : Hole position (Note 2)
Z_ : Z point position (Note 2)
R_ : R point position
P_ : Dwell time
L_ : No. of repetition
F_ : G98 mode Feed rate of tapping axis
G99 mode Pitch of tap
E_ : No. of thread per inch (Effective at G99 mode only)
S_ : Spindle speed of rotating tool
(Note 1) If number of repetition (L) is omitted, it deems as L=1.
If L=0 is commanded, it moves at hole position but tapping is not
performed.
(Note 2) Command a position of Z point by an axis address of tapping axis.
Command a hole position by an axis address other than tapping axis.
(Note 3) R and Z points and P are mordal during a fixed cycle.

Give it a shot!
John

[shas595]

I think the programming manual is assuming you want to do tapping via the C Axis - so just delete those out of the code and replace as necessary. Let me know how it works out

John