Re: G02, G03 & EMC

In a message dated 02/03/2000 8:58:16 AM Hawaiian Standard Time,
clintbach@... writes:

<< Problem in a nutshell... Same machine, Same exact drawing, G02 and G03
work with R inputs but not with I, J, K inputs. Solutions?


Thanks,

Clint Bach >>

Clint,

What CAD package do you use? What CAM? I found that if I have my CAD set
up with three decimal places, when the CAM module writes code, it rounds off
the numbers too much for my CNC to cut from it. I think you need to play with
the number of decimal places both packages use.

When you program with the R number, you can create a part with a bulge on
the corner or a "cut corner" where a larger than intended radius is cut. Both
would be syntax wise correct. When programmed with an I, J, K etc, the center
point of the arc is known. If the math doesn't work out for the radius to
meet the end point, it will hang up many CNC's.

If you can play with the CNC to loosen it up, I guess it will work but
your theoretical path is sloppier. On some applications a few thou off is not
a big deal. On some, well......

Peter