I only know how to thread regular threads with no taper......
G76 P021060 Q0050 R0002
G76 X.92 Z-1.0 R.003 Q.010 F.0625
This is the only way I know how to thread, but now I need to know how to thread tapers. I found an example in a CNC book that goes like this......
For outside diameter taper threads, “I” will always be negative. For inside diameter taper threads, “I” will always be positive.
The actual value of “I” requires trigonometry to calculate. “I” will be equal to the tangent of the taper angle (usually 3.718 degrees) times the overall length in Z of the threading pass. This length must include the approach distance (as in this case, .200)
If for example, your external thread is 1.0” long and you have a .200 inch approach, the value of the “I” word will be -.0779 (Tangent of 3.718 times 1.2)
I know how to figure the "I". But how would I write this? It has a picture example showing K= Thread depth. D= first pass depth.A=angle. It doesn't give me examples of how to write this, only a picture showing what letters represent. I am used to telling how many passes to take but I don't see an example.
From what I understand it is telling me, it should be written like this.....
G00 X4.2 Z.2
G76 X3.826 Z-1.9 K.087 D0160 A60 F.500
How do I tell it how many passes to take if this is how you should write it? Is there more or less I should put in it?
Help please!!!!