Re: [CAD_CAM_EDM_DRO] Engraving methods

wanliker@... wrote:

When a person is converting a machine to CNC, sometimes it is necessary to
make new dials if they want one after possibly changing the lead screw pitch.
I can easily understand the straight lines for the .001, .005, and .010
markings, long and short lines for each position, and how they would be done.
But my problem understanding comes into play when you start engraving the
numbers.
How do you make allowances for the curvature of the dial,at different
diameters, the different width of the numbers. Example 1 versus 2, take up
different amounts of space.

///Hi Bill, A 4th axis horizontal rotary table is the best way this can be achieved with good results. One might get by with an dividing head/ super-spacer. Just use a tiny ball nose and do a 3-D drawing in a Cam program. Might even get by with just 2-D if the numbers dimension (width) are kept small in relation to the diameter of the handwheel. Instead of having 10,20,30 etc. just use 1,2,3,etc. directly on top of the ten thousandth hash-line. ///

What software is used for this, and would someone post a sample G code, for
a 2 inch dial for an example. I will not be running it, but want to study it.

////Bobcad V18 will project and vectorize text on a 3-D surface.

Also please describe setup, angles, etc.
Thanks,
bill


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