G76 threading help

[gcode]

Its been a while since I ran a lathe

and I need some help with a threading cycle.

Its a Mitsubishi control ( 99% Fanuc compatible)

I'm threading with a live center and I'm getting

.004 taper ( big on the end) so I need program a

-.004 taper in the G76 threading cycle.

If I remeber right, I just figure out the taper angle

and add an R-( the taper angle) to the second G76 line.

Is this right??

Is there a better way??

[Ron Branch @ Verisurf]

Yes Tom just put the Taper angle in the Parameter page for the threading operation, but I think it it might only take a positive number so not sure how you can work around that. If it take a negative number good, but just not sure and no manual for me to look at to be sure.

 

HTH

[Zoober]

Most of my lathe stuff on Fanucs use a I or I- for taper control in the G76

That's on 10T controls....

[gcode]

I think R is the command for a taper angle

and I is an incremental adjustment in X

Without having a manual to read its

can be a pain figuring this stuff out

[Zoober]

From the 10/11/12T manual:

EDIT:

tom, found this with a mitsu example of taper threading:

Link

 

Look at second response for the two liner.

[gcode]

Thanks that looks like its an ID pipe thread

prgram

[Zoober]

Sorry, I was getting hung up on the one line style as that is what I use all the time on the 10 controls we have.