Re: CNC JR

--- In CAD_CAM_EDM_DRO@yahoogroups.com, "Vlad Krupin" <vlad.cnc@...>
wrote:

Sometimes it is suprising what can be done at slower spindle speeds.
I have ran engravings that had 400,000 lines or so at 2400 RPM and
the detail was excellent. These were about 2.5"X3" in size.
A lot of times to fast of a spindle speed can cause the cutter to
whip. A lot depends on what cutter you use and the feed rate. Plus
what you use for coolant/lube. I flood the engraveing with WD40. I
have engraved photos into aluminum and when you hold the part when
done and look at it from all sides its almost like its real.

Gary

> > 240K lines? That sounds like a LOT of lines, no matter what

machine you

> are talking about...
>
> 240K lines for a workpiece of such a small size probably means

that you were

> using a fairly tight mesh, and a fairly small cutter. Maybe I am

mistaken,

> but it seems that at that point the spindle speed becomes the main

limiting

> factor, so going for a bigger machine may actually be counter-

productive.

> Unless you have the budget for a big machine with a very nice fast

spindle,

> of course.
>
> Vlad
>
> --
> Vlad's shop
> http://www.krupin.net/serendipity/index.php?/categories/2-

metalworking

>
>
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>