How would I define the Freud 72-300 bit for Litho?

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kristenanne77
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How would I define the Freud 72-300 bit for Litho?

Post by kristenanne77 »

This freud 72-300 bit is a conical (V shaped) shaped ballnose with the tip being 1/32 inch.
I want to try it for lithophane.
How woud I classify this bit as an addition to the bit menu. Its not exactly a straight ballnose, and it is not a V bit either.
Its a bit of both.
Here it is:
http://www.rockler.com/freud-72-300-tap ... -1-4-shank

Thanks
K

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IslaWW
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Re: How would I define the Freud 72-300 bit for Litho?

Post by IslaWW »

Enter it as a tapered ballnose
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Xxray
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Re: How would I define the Freud 72-300 bit for Litho?

Post by Xxray »

I agree, tapered ballnose.

In fact a 1/32 TB is what I use for lithos, takes some time to get the fine detail but I can get details down to individual stands of hair.

Geometry of your particular bit could possibly cause variations in the cut vs a standard ballnose, only real way to tell is use both and see what is different.
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kristenanne77
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Re: How would I define the Freud 72-300 bit for Litho?

Post by kristenanne77 »

I don't see any entries for a tapered ballnose.
Only Ballnose, V bits and Engraving bits.

K

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Adrian
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Re: How would I define the Freud 72-300 bit for Litho?

Post by Adrian »

There isn't a tapered ballnose option for PhotoVCarve. Only the more recent programs like Cut2D, VCarve and Aspire have that option.

I'd try it as a 1/32" straight ballnose as only the tip is really used so the taper should have a minimal effect.

kristenanne77
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Re: How would I define the Freud 72-300 bit for Litho?

Post by kristenanne77 »

I was going to try and import the PhotoVCarve file into VCarve desktop 8.5 but I do not see an option for tapered ballnose in the VCarve program.

K

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Adrian
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Re: How would I define the Freud 72-300 bit for Litho?

Post by Adrian »

It's definitely there in VCarve. Click New in the database and you can select it before entering the tool info.
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dwilli9013
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Re: How would I define the Freud 72-300 bit for Litho?

Post by dwilli9013 »

kristenanne77 wrote:I was going to try and import the PhotoVCarve file into VCarve desktop 8.5 but I do not see an option for tapered ballnose in the VCarve program.

K
You have to change it in the drop down menu on the right side of the Tool Database.
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SteveNelson46
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Re: How would I define the Freud 72-300 bit for Litho?

Post by SteveNelson46 »

You could just draw your own. The Freud website has detailed drawings of their bit profiles.

http://www.freudtools.com/index.php/pro ... uct/72-300
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kristenanne77
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Re: How would I define the Freud 72-300 bit for Litho?

Post by kristenanne77 »

Thanks. I have added the tapered ballnose.
Unfortunately, when I imported the PhotoVCarve toolpath file into VCarve, I was unable to change the bit size that I originally used with PhotoVcarve to the new tapered ballnose bit entry in VCarve.

K

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Re: How would I define the Freud 72-300 bit for Litho?

Post by LittleGreyMan »

kristenanne77 wrote:Unfortunately, when I imported the PhotoVCarve toolpath file into VCarve, I was unable to change the bit size that I originally used with PhotoVcarve to the new tapered ballnose bit entry in VCarve.
I never tried it as I do not own PhotoVCarve, but it makes sense to me: you import a toolpath calculated by another software, so you can't change such a fundamental parameter as the tool which requires recalculating the toolpath.

I assume you have the same limitations as in Aspire: moving the toolpath (and not resizing it) and changing cutting parameters (speed and feedrate). See your Vcarve reference manual or help.

HTH
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Re: How would I define the Freud 72-300 bit for Litho?

Post by kristenanne77 »

In PhotoVCarve, I will try creating a new "engraving bit" with a diameter of .25 inch, side angle 0f 6.2 deg, and a flat diameter of 1/32 (.03125). That should be close.

K

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Re: How would I define the Freud 72-300 bit for Litho?

Post by adze_cnc »

kristenanne77 wrote:In PhotoVCarve, I will try creating a new "engraving bit" with a diameter of .25 inch, side angle 0f 6.2 deg, and a flat diameter of 1/32 (.03125). That should be close.
If you want to be better than just close you could use a flat length of 0.0280". Trigonometry comes to the rescue.

Steven

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