Another newbie question

[Larry Myers]

Hi All,

I have a Sharp 2412 VMC with a Fanuc oi computer. I believe there are some canned cycles however the documentation is nasty at best. I am still very new to g-coding with about 6 months under my belt.

I want to mill a circle pocket (1.5” dia) and a rectangular pocket (2”x3”), both with the origin at 0,0, (two different parts) and using a 1/2” end mill. Both will be 0.025” in depth.

Can anyone advise me if there is a simple way to achieve this? Thanks very much in advance!
Larry

[g-codeguy]

I don't program mills, but maybe I can help anyway. I assume when you say "both with the origin at 0,0" that you want 0,0 to be the center of the circle and the center of the rectangular pocket. Not that it matters. You can make 0,0 anywhere you want. Mills where I work all use G54 through G59 to set work offsets for multiple parts.

That is you could use G54 to set 0,0 in the center of the circle, and G55 to set 0,0 in the center (or a corner) of the rectangle. Then you simply use G54 to call up the work offset for the circle, and then the g-codes for it. Clear the part, call up G55, move to starting position, and then run the g-codes for the rectangle.

I program lathes, so if I'm wrong, please don't be too hard on me.

BTW, do you know how to set these work offsets (G54,G55, etc.)?

[Larry Myers]

Hi G-codeguy

Thanks for the help. I am sorry that I wasn’t clear in my question. I am looking for help with the canned cycles that may or may not be in the Fanuc Oi. I was hoping that for circle or rectangular pockets, there might be some conversational type programs that would help in my milling. Since I do not (yet) use cam, I need to program the pockets.

For example on my old 3 axis knee mill, I could call for a circle pocket, fill in the blanks for radius, finish, depth, etc. and the machine would go at it.

When I said two parts, I meant two parts being run separately. Not at the same time. I am fairly familiar with the G54 and G55 codes and how to use them.

Again, I do appreciate your response!

Larry

[JWK42]

Do have macros?
If you do I can send you a macros written for a Haas control that will do both Rectangle and Circular pockets.

[Larry Myers]

Hi JwK42,

Thanks for the offer however I am not sure what to do with macros or if I have them on the Fanuc.

Is that something I could load into the Fanuc?

Thanks again,
Larry

[JWK42]

Go to MDI mode
type in:


#101=.01
#102=.01
G91 G00 X#101 Y#102
G90


Hit cycle start
This should be a safe incremental .01 move in X and Y
If you get an error then you don't have macros
Let me know before tomorrow. I'll be gone all next week.