Lathe stock to leave

[TonyL]

I am working on a lathe part and am trying to put a -.00015 stock to leave on my finish passes to allow for plating build up. Mastercam will not let me put in a negative value. You can do it in milling paths, I dont understand why you cant in lathe. Is there another way to do this in Mastercam X2(besides redrawing the part).

 

Doing it with tool offsets at the machine is not an option.

 

Thanks,

Tony

[ReDEyZZ]

Can you just leave .00015 on finish X

[TonyL]

I could if I wanted the part bigger by .00015 but I need the X and Z smaller by .00015

[Todd84]

I just did it in X2 MR1. I entered -.0015 in the amount to leave in the finish pass box and it took it and cut smaller than my finished Diameter.

[chowquoe^]

Same here.. entered -.0015 and cut under size in backplot and posted code.

X2 MR2 SP1

[crazy^millman]

Weird I just did the same test with X2MR2SP1 and no problems here. Got a file you can share???

[Redfire427]

We do this all the time when we create electrodes on the lathe. Stock to leave is set at -.0025 or whatever is required. No problem.

[TonyL]

I did try it on the finish turn toolpaths and it worked but the toolpath in question is a groove rough and finish toolpath. In the finish parameters I still can't get a negative number in the X stock to leave. I can probably take out the finish path of the groove toolpath and just do another finish turn operation.

 

Thanks,

Tony

[TonyL]

No luck, i cant get the finish turn toolpath to follow my contour. It wont plunge into the part. I tried all the different plunge paremeters but did not get any change. I would gladly put it on the ftp site but i do not know how.

 

Thanks,

Tony

[kenfromlodi]

Just lie and define your tool width -.0015 smaller and when you run it will cut over or you will have to redraw it.

 

I personally would redraw it. very easy just offset contour the groove geometry and rechain.

[Todd84]

Give me your email i have an example, or email me the part.

[Todd84]

Bump

[3rdstring]

quote:

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I tried all the different plunge paremeters but did not get any change.

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Does that include Tool width compensation >> Use tool width ?