Re: [CAD_CAM_EDM_DRO] Re: Help needed with G code

Mike Chaney wrote:

>Tim wrote:-
>
>
>
>>You may have to define your working plane before the "G01 Z-1.20", so
>>the machine knows where the starting point is in the Y-Z plane before
>>continueing with the arc???????
>>I also agree with the use of "K" for Z rotation & redefining Z-1.20
>>is not necessary, but it shouldn't hurt you if your in the right
>>plane to begin with.
>>Hope this helps,
>>
>>
>
>That's an interesting thought. I've finished now for the day so I'll give it a
>go tomorrow. In fact I've found an alternative way of cutting this particular
>curve using a fixture in the lathe, as I needed the job finished. Not very
>satisfactory, I know, so I'll persevere in case I need to use this type of
>operation again.
>
>On second thoughts, I'll nip out to the workshop and try it now.......
>
>......Back again. It makes no difference. What I have found is that, using I
>and J as parameters, it ends up at the right place, but follows the wrong path.
>What is happening is that it recognises the I value, but assumes a value of zero
>for J, no matter what I input. Substituting K for J changes the tool path, but
>it ends up in the wrong place. I'm perplexed (:<)
>
>

I think it is pretty clear that your CNC software really doesn't support
arcs
except in the XY plane. I'm assuming you did use a G19 first to select the
correct plane of arc motion. You really should get an error message if you
have selected G19 and then try to make any arc move where an I word exists.
Any movement in the X axis would mean a linear move in X, and the J and K
words specify the distance to the arc center in Y and Z respectively.

Jon