Re: [CAD_CAM_EDM_DRO] Re: using a CNC mill to engrave metal

Good point. I never considered that 'cause I currently do all my engraving
by hand using a hammer and never had a problem like that.

Smoke

>It's been my experience that engraving very shallow (a few thousands)
>characters is difficult with a conventional cnc milling machine. If
>the workpiece is not absolutely parallel with the machine's table
>surface you're likely to get washout of characters across part of
>your work. Facing off the work surface prior to engraving is only
>sure way I've found to do shallow work, but that's not always
>practical.
>
>Some high speed commercial engraving machines compensate for uneven
>workpieces by using a spring or pnuematic loaded Z axis with a nose
>piece which rides on the work surface to assure accurate depth of
>engraving. Without such a device it's almost impossible to do fine
>engraving on things like stamped metal nametags, etc.
>
>Doug
>
>
>
>--- In CAD_CAM_EDM_DRO@y..., "Smoke" <gordonr@r...> wrote:
>> The biggest factors concerning what cutting tool to use would be
>the size of
>> the lettering and what sort of effect your trying to achieve with
>your
>> n"engraving". Since the depth of cut is only going to be a few
>thousandths,
>> you could do your engraving with a .005" (or so) diameter end
>mill. If you
>> wanted the lettering to look more like real engraving, you could
>you an end
>> mill with a tapered point.
>>
>> BTW...if you use a .005 or a .010 dia. end mill for cutting the
>letters,
>> you'l have some really accurate letter shapes which can easily be
>converted
>> for gold/silver inlay work. Sounds like a great idea for doing
>lettering
>> inlay work on firearms.
>>
>> Smoke
>>
>>
>>
>> >david albert wrote:
>> >
>> >> I was wondering if anyone has any experience using a sherline
>mill
>> >> with a CNC package as an engraver. Ideally, I would like to be
>able
>> >> to type some text on a keyboard and have the mill enrave some
>metal
>> >> down a few thousandths with what I typed. What end mill should I
>> >> use? What CNC software? Any web site you could point me to?
>thanks
>> >> in advance.
>> >
>> >if you are doing 2" high letters, a 1/16" or smaller end mill
>might do. If
>> >you are doing smaller letters, a flame-point carbide bur (Dremel-
>style
>> >tool) will do nicely.
>> >
>> >Jon
>> >
>> >
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