fine bore(G76)

[spade117]

How exactly does this work?

 

What does the shift(Q) do?

[Guest]

SPade,

 

It will at the bottom of your bore, (Q)shift you machine in the designated axis, usually define in your machine parameters and set to an amount by the Q so that upon retract the tool is away from the wall so you do not get the drag line up the bore.

[spade117]

Cool...that's what I was hoping. Now I need to figure out what parameter it is.

[Guest]

quote:

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Now I need to figure out what parameter it is.

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Time to break out the book

 

[PeterM]

G76 may use an optional incremental shift value,IE I, J . Like John says, break out the book.

[Tim Johnson]

What control?

[Rocketmachinist]

I have a question about this canned cycle. Is this for using a boring head or an I missing something. It looks like the best option but I'm afraid that the shift might crush the tool into the wall depending of the direction the tool is pointing.

[Mic6]

quote:

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It looks like the best option but I'm afraid that the shift might crush the tool into the wall depending of the direction the tool is pointing.

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To get the tool to shift in the correct direction, I like to load the boring head hand tight, load in the spindle, orient the spindle, turn the boring head by hand so the tool tip is say, at the 3oclock position remove the tool and tighten securely. Now if you shift .01 in the x- direction, you'll clear the wall because at the end of the cycle the tool orients. All this applies to my situation in a Haas, where I can set the shift direction in the control, your situation may be different.

[jeff]

Yes mainly used for a boring head.

As for crushing the tool into the wall, I believe that it orientates the spindle on the move,so make sure your B-Bar is positioned correctly.

I haven't used it in a long time though.

 

Edit: Mic6 beat me to it

[Mic6]

You're to busy dancin' around

[Mgrenier]

I would suggest using I and J instead of Q. That way you control both the direction of the move before retract.

 

JM2C