[Boss&Sons LLC]

I haven't used any tension compression tap heads in years. Is the code like rigid tap code? Anyone have a sample of what a PCNC 1100 likes to see for tapping? Forgive my ignorance please LOL!!

[gsnorcal]

Here's my little M8x1.25 utility file. I based it, in part, from the annotated images in this post, I think: http://www.tormach.com/blog/?p=963. There was a PDF of the various formulas as well. I used an optical tach to compensate on RPM.

(tested in 6061 with 1" hole to .75" tap depth)

G0 G49 G40  G17 G80 G50 G90 

M998
M6 T20
G00 G43 H20 Z0.2

M8

M03 S275
G4 P4 (DWELL to spin up)
G1 Z-.75 F10.827 (down)
M4 S250 (reverse spindle)
G4 P0.5 (wait for reverse)
G1 Z.25 (up)

(END)
M5 M9
M998
G80 
G90
M30

[Boss&Sons LLC]

Thank you for taking the time to respond sir. I have made some notes and will try and tap these 1/4-28 holes in 303 SS on Mon. first thing.
Thanks again!!

[MichaelHenry]

They are very easy to program if you use SprutCAM and as gsnorcal showed, not hard to manually program either.

Mike

[turbostang]

There's a snippet in the manual that came with the tapping head. I copied it character by character and it worked great. It even uses a 1/4-20 tap.

[Boss&Sons LLC]

Just fired up the normal computer LOL. Thank you Gsnorcal for the sample code worked great!
Lots better than on my Bridgeport with this 1960s tap head contraption I've used for years!!!
I don't use sprutcam but I did as I saw suggested else where to subtract 10% on feed in and add 10% on feed out.
When I posted the other day I had spent too much time dinking around trying to put these parts in the fourth axis.
Long story short I may have been able to use the 4th axis had I been willing to wait for the pulley tap.
I might order one and try that setup again.
Anyone used pulley taps successfully with tension compression in SS?

Thanks for all the input guys.


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