CNC'ing a small lathe - pimping the unpimpable...

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Re: CNC'ing a small lathe - pimping the unpimpable...

Postby OverTheTop » Mon Jul 25, 2011 8:16 pm

Just shouted myself a new lathe and the DRO (digital readout) was set to diameter mode. This is completely opposite to what I have always used.

I was going to change it back to radius mode but following your comment:
Gents, write this down somewhere: Bundy + Radius Mode = Not good. Use Diameter Mode in conjunction with Bundy...
You'll agree when you get there...

and some thought, I think I'll leave it as it is!! :D

PS Substitute "Black Sambuca" for Bundy!
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"Everybody's simulation model is guilty until proven innocent" (Thomas H. Lawrence 1994)

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Re: CNC'ing a small lathe - pimping the unpimpable...

Postby PK » Mon Jul 25, 2011 8:31 pm

I was a radius mode guy for a long time. It makes sense I you are turning things like threads and grooves where you think of them in terms of depths below the surface of the part. Catch is you're always dividing your diameters by two when turning to size.
In diameter mode (which I now evangelically encourage) you have to double your thread and groove depths, but this doesn't seem as bad. Plus, most of my mistakes in diameter mode seem to result in not removing enough material, whereas most of my mistakes in radius mode seemed to result in a junked part.


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