On Tuesday 05 November 2013 00:33:26 Gregg Eshelman did opine:
> On 11/4/2013 6:12 PM, Gene Heskett wrote:
> > On Monday 04 November 2013 20:10:50 Gregg Eshelman did opine:
> >> On 11/4/2013 7:53 AM, Gene Heskett wrote:
> >>> Hell, I'd pay
> >>> another $200 for a Drill Doctor that could do a 1/16" bit RIGHT.
> >>> But that beast isn't made, the drill bits, sloppy as they are, are
> >>> too cheap to be a target for the DD. Dammit.
> >>
> >> Buy one of the sharpeners from Darex, the company that makes the
> >> Drill Dr.
> >
> > Nice try, but the base line $1,450 model only goes down to 1/8". And
> > I did say +$200, not +1,200. ;-)
>
> Something I've thought of for improving the Drill Dr. for smaller bits
> is to use a pin vise, turned smooth on its outside. Hold the small drill
> in the pin vise and the pin vise in the Drill Dr's chuck. The gotcha
> with that is the setup would also need a special alignment fixture with
> a magnifying lens and finer / more accurate alignment blades or whatever
> to ensure the bit is rotated properly.
>
> What I've found on my Drill Dr. is the cutting edges need to be aligned
> with the jaws clockwise from the line molded into the end of the chuck.
>
Unforch, for the 2 copies of the DD I have, the inaccuracy's of the
centerline are inherent in the sloppy molding of the chuck. Its just that
its not that important for a 3/8" drill bit if its 20 thou off center,
unless you really really want a .375" bit to drill a .375" hole. But a
.125" drill bit that cuts a 1.37" hole because its sharpened so lop sided,
is more the rule than the exception. And when that far off, the hole will
be tapered small, almost down to the drill size, .375" into the depth of
the hole. So I more often than not will use the DD to get a fresh edge,
and will then pickup the dremel and try to even the facets, using a lens
intended for a 16mm projector as a magnifying glass. Sometimes I get it,
sometimes I don't.
I am tempted to build or buy, a calibrated angle base for the 4" table I
have, and write a program to do that on the mill. Now that I have whipped
the stiction of my Z axis, I can easily offset the Z according to the
center offset of the table and with nothing better to do, sharpen a .032"
carbide drill to make it like new again.
Or, someone in the last week or so, said they had some harmonic drives they
took off a robot, perhaps I could make a deal for 2 of those & build my own
compound motion table. But when the remark was made a few days ago, no $
signs were mentioned. If whoever has those could fill in the blanks so I
could determine the feasibility...
Cheers, Gene
--
"There are four boxes to be used in defense of liberty:
soap, ballot, jury, and ammo. Please use in that order."
-Ed Howdershelt (Author)
Many people are desperately looking for some wise advice which will
recommend that they do what they want to do.
A pen in the hand of this president is far more
dangerous than 200 million guns in the hands of
law-abiding citizens.
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