Macro Question

[MIL-TFP-41]

A little OT, I know...till I try to get it working in the post

 

We are running production parts on a 5 ax mill that have a internal groove with a diameter of .225 +-.001 and a height of .067 +.001 -.000. Now on a low production part this is not a big deal....it is easy to adjust the program to get the height correct. On a production part it is a PITA to make adjustments to a proven program just to adjust the height for when you change tools, tool wear, ect. (Feature is being cut with a keycutter)

 

Here is an abbreviated example of what the code looks like now...

 

code:

---

G1 Z-.146 F40.

G41 D1 X.0094 Y.0094 F12.

G3 X0. Y.0187 I-.0094 J0.

X0. Y.0187 I0. J-.0187

X-.0094 Y.0094 I0. J-.0094

G1 G40 X0. Y0.

Z-.15 F40.

G41 D1 X.0094 Y.0094 F12.

G3 X0. Y.0187 I-.0094 J0.

X0. Y.0187 I0. J-.0187

X-.0094 Y.0094 I0. J-.0094

G1 G40 X0. Y0.

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So basically the cutter feeds down to the first height, cuts the groove, feeds down .004 and cuts the second height.

 

What I want to do is be able to adjust the cut on the first height...lets say I need to make the slot .001 wider.

 

So in my head I pick macro variable #580 and make it .001 and modify the program as follows...

 

code:

---

G1 Z-.146 + #580 F40.

G41 D1 X.0094 Y.0094 F12.

G3 X0. Y.0187 I-.0094 J0.

X0. Y.0187 I0. J-.0187

X-.0094 Y.0094 I0. J-.0094

G1 G40 X0. Y0.

Z-.15 F40.

G41 D1 X.0094 Y.0094 F12.

G3 X0. Y.0187 I-.0094 J0.

X0. Y.0187 I0. J-.0187

X-.0094 Y.0094 I0. J-.0094

G1 G40 X0. Y0.

---

The only change I made is to the first line....my question is...would this work???

[Ahell]

Z-[.146+#580]

 

Thats how i would do it. Your idea is correct just the formating is off.