Re: [CAD_CAM_EDM_DRO] Digest Number 3677

Don, take that piece of advice about the arrow in the ass and CHUCK it
into the scrap chips bin. ALWAYS take chances, be a pioneer, and never
ever listen to any bad advice about not trying something - anything. If
you want to stick to a policy of timidity, then get out of everyone
else's way. Winding up dead with no arrows in yer butt is worse than
with a list of successes, even if it is peppered with failures.

Cad_Cam obcomment - Here's a tip on a plastics job just completed: When
programming a CAM profile for a chamfer, try a couple of offsets so that
you can choose the best when you get it on the mill. After going back
and forth between the computer and the mill a few times, I just made 3
or four toolpaths, numbered them sequentially, picked the best one.
(Clearance was crucial on this one.) Also: The job was all metric. Set
up a spreadsheet with a column of the calculation from mm to inches, and
just plug every single metric dimension you see in one column, let it
calculate (I like 4 places) the inch equiv. in the second column. There
are .03937 inches (almost exactly) per millimeter. Also, parts were
made of 1/4" polycarbonate sheet, and required a clean surface - well,
polycarbonate scratches like the devil, and this job has about 10
setups. But have the plastics shop blank the pieces out of Scratch
Resistant Lexan, and see how well they hold up. $19 dollar parts can
afford a double material cost, $.60 ea.) Also found that Harvey Tools
single-flute plastics cutters give a beautiful edge, run them as fast as
possible.
(http://www.harveytool.com/plastic_cutting_carbide_end_mills_hard.htm)

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Don Rogers wrote:

>At 04:17 AM 3/10/2004 +0000, you wrote:
>
>
>>If you were scamming a seemingly small technical oriented group,
>>
>>What would be accomplished by making statements that might raise
>>some questions?
>>Be brave, give them a chance.
>>
>>
>
>Bob, way back when I was a young Customer Engineer for IBM, I was trying to
>talk a salesman into to selling my customer one of the latest machines that
>had just been released. His response was simple and to the point. "Don,
>don't you know that pioneers end up with arrows in their ass".
>
>My suggestion is to get a big shield for your posterior and then, if I'm
>wrong, serve me up a plate of crow. I've kind of got used to it, but I
>still am willing to bet a plate of crow to a quiver of arrows anytime.
>
>Don
>
>
>
>
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