Re: [CAD_CAM_EDM_DRO] cnc tapping options for making cnc tooling table

Would it be possible to get a copy of the program to generate g-code for the
tapping head.

Paul E. Killoy

----- Original Message -----
From: "Jon Elson" <elson@...>
To: <CAD_CAM_EDM_DRO@yahoogroups.com>
Sent: Friday, September 03, 2004 6:31 PM
Subject: Re: [CAD_CAM_EDM_DRO] cnc tapping options for making cnc tooling
table


> skykotech wrote:
>
> >I want to make a tooling table for my cnc mill, and possibly another
> >table for a medium gantry mill I am building. I haven't exactly
> >decided how large the table will be or what size holes it will have,
> >but something along the lines of 16" x 32" x 1" with 420 tapped holes
> >would probably be the largest. Now, I am not going to hand tap 420
> >holes, so I need an option for a cnc tapper.
> >
> >Option 1: Procunier tapping head - fast but expensive ($500+ new)
> >
> >
> I got a Procunier 15000 series "CNC" tapping head on eBay for a little
over
> $100. It drives the tap 1:1 when pushing forward and 2:1 reverse when
> pulling
> up on the tap. It is for 0-1/4" taps. It has no overload clutch, it
> depends on the
> CNC spindle to know when to stop advancing. It is the fastest thing for
> tapping
> I've ever seen. I did a 12 x 12 pattern of 10-32 holes in about 15
minutes.
>
> I just got some "thrillers", taps with a drilling tip on them, and so I
> now drill and
> tap in one operation, even faster! You have to enter the spindle RPM
> into a calculation
> to figure the feedrates.
>
> I use helical flute taps for blind holes, and once you get the depth set
> right, it
> will tap hundreds of holes with no problems at all.
>
> >Option 2: Threadmilling - slow, but possibly much cheaper
> >
> >
> I wouldn't do this for anything less than about 3/8". I have a "single
row"
> threadmill that you have to orbit the entire thread, one turn at a time.
> But, it will do all thread pitches over a fairly wide range with the one
> tool.
> I have used it twice in about 5 years.
>
> >I am using EMC and can do full three axis moves, but I don't have
> >computer control over the spindle speed, position or direction. All
> >of this is making me lean toward threadmilling, perhaps 1/4" 20TPI
> >holes using a single point right hand tool like the Micro 100 1801000
> >which has a min. hole dia. of .180", a projection of 0.040", a shank
> >of 0.25" and a depth of 1.0". I have no clue if this would be the
> >right tool for threadmilling holes in an aluminum cnc tooling table,
> >but it is pretty cheap, solid carbide for $22.
> >
> >
> It will work, but it is REAL slow. I have a program for cranking out
> the G-code
> for it. The tapping head is probably 100 times faster. I have a program
to
> generate the G-code for that, too.
>
> Jon
>
>
>
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