Re: [CAD_CAM_EDM_DRO] Re: Fly cutter on Sherline.

Hello Alan,

I wasn't thinking of turning a piece of square stock into a bar, but
turning down a piece of round stock to size. I'm just too much of a cheapo
to buy a lathe you see : ) I think my school was chucking a really good
looking heavy one but I didn't think to ask at the time [kicks himself]. I'd
buy one if I thought I'd use it enough to warrant it. I wasn't allowed to
use the end mill in school : ( They had to phone health and saftey to
check whether or not it was okay. It's really pathetic the health and saftey
stuff our schools here in the UK have to do now with all the liability and
claims against them they get. This will make you laugh, in physics we were
'investigating the tension in springs and elastics'. For this experiment we
needed, one newton meter, one clamp stand, one small parcel like elastic
band, a partner and two pairs of SAFTEY GOGGLES! Saftey goggles to stretch
an elastic band 4cm!!! That's just insane! We're 15- 16 -17 and can't be
trusted with an elastic band between two people. Thinking about it though, I
can imagine atleast 28 different ways of slaughtering my school (Complete
with 1500+ pupils) with an elastic band. For one, I could strench it out
real long and tie a marble to it. Or I could fired baulders at the school
from the hill outside. Or de-rail a train by stretching it across the tracks
just behind our school so it hit the hall. It almost makes me cry it's that
bad. Like not being allowed to use the welders anymore until we're 18 - 19,
or the lathes without a member of staff to watch us, or the drill presses
without staff there, or the oxy / acet torch, or the brazing torch, or the
vac former, or the plastics mill (Which was £6500, despite it being only
able to just mill Alu on A4 size. It can't even do that! They never let you
use it with metal. I was told I could use it to engrave my DT project's
anodised table top with a chessboard. A few weeks later and a lot of paper
work done and it's suddenly 'It's far to jittery to engrave Alu', from the
same techer as well! Why didn't they buy a Sherline or anything other than
this piece of cr*p that might have been of some use! £6500! I bet it's
something to do with being ISO certifed or health and saftey!). But somehow
we're meant to produce these beautiful works of art in metal? It took me two
weeks on my last project to get the techinician to watch me while I cut the
end off some pipe and chamfered the ends. The disgrace of it all. : ( Wait
till I cast that Gingery lathe and show them! : ) But I suppose I only
have my fellow pupils to blame, the people who can't be left in a toilet
without smoking, scribbling on the walls, or trying to destroy the basins.
We had our school rebuilt to allow the lower site onto the upper site and
within ONE WEEK of the new toilets being open the actual toilets themselves
had been broken off the wall and the room flooded quite a few times. The
walls needed repainting after a month, but this time with special anti
retard, anti shoe scuff rubberised paint. If I was prime minister this would
be one MAJOR dictatorship of a country when it comes to little turds like
that (I'd beat them up myself). I think I'm side tracking here.
I think that's about enough complaing for now anyway. Has anyone ever worked
with a Hurco SM1? I've found one of these on auction for less than I can buy
a desktop mill, fully cnc ready it's just no one has noticed it yet I don't
think.

Best wishes,
John

(Off to pay his tax for some DHS filth to spend on fags / alcohol / drugs /
pizzas / mobiles / playstations / a PC and sky TV)

----- Original Message -----
From: "Alan Marconett KM6VV" <KM6VV@...>
To: <CAD_CAM_EDM_DRO@yahoogroups.com>
Sent: Thursday, March 01, 2001 8:59 PM
Subject: [CAD_CAM_EDM_DRO] Re: Fly cutter on Sherline.


> Hi John,
>
> I don't think the indexing rig can be driven by a stepper. The old
> manual rotary tables will need a bracket and coupling to convert to CNC,
> the new ones have a CNC version with the "cone" motor mount installed.
>
> A round stock to have facets, or a SQUARE stock to be round!
>
> I WOULDN'T try spinning *SQUARE* bar stock against the fly cutter! You
> can emulate a lathe with the indexer or rotary table, but I'd use an end
> mill, and take off the material in a series of cuts. Perhaps knock off
> the corners first to make an octagonal piece, then knock off the corners
> again... Good job for CNC. Then again, I suppose one could just "turn
> it" like in a lathe (albeit slowly), using a rotating end mill. Try it,
> and let us know! I think I need a tailstock... Hellooo Sherline!
>
> Adding facets to round stock would be easy. Just setup on the positions
> of the "flats", and use an end mill to flatten 'em off! IMO, the fly
> cutter is for LARGE surface areas. It DOES make a mess!
>
> Cheers! And may the swarf be with you!
>
> Alan Marconett
> P.S. I ordered the MicroMark catalog!
>
> http://www.micromark.com/
>
>
>
> e.heritage@... wrote:
> >
> > Ahh, as always literally two minutes after I send the mail I find the
answer
> > out elsewhere. Just after sending it the Sherline catalog appear at my
door
> > and after about thirty seconds flicking through I discover what a fly
cutter
> > is for and how they're used for cutting gears and teeth on the rotary
table
> > and that they're primary use is for milling large flat surfaces (There's
> > even a picture for the lesser experienced. Myself). They look pretty
useful
> > if you need to do that kind of thing for just £15, sure looks violent
> > though, even taking tiny slices. Same with that toothed circular saw for
> > cutting gears! After I saw the picture in the Sherline mag I realised
they
> > must have been either milling a round stock to have facets. Or, I'm not
> > sure, but it might have been used to turn a round stock by spinning the
> > thing up, rotating the bar and passing it back and forth along the
length of
> > the stock. I don't know though, does anyone think that might work? Have
you
> > seen the steam engine in the first page of the new Sherline catalog!
That's
> > SERIOUSLY small! The only thing I'd criticise Sherline for is not
inculding
> > much metric along side all the imperial they use (Cockroaches? : ) When
it
> > says stuff like, '0.003" and down to 0.002 with skill' I go looking for
my
> > calculator. Come on Sherline, just a little metric... please? For the
sake
> > of my calculator! Is there any difference between the rotary table and
the
> > indexing table apart from the rotary can be laid flat on the bed? Does
the
> > indexing table allow for CNC?
> >
> > Regards,
> > John
> >
> > ----- Original Message -----
> > From: "Alan Marconett KM6VV" <KM6VV@...>
> > To: <CAD_CAM_EDM_DRO@yahoogroups.com>
> > Sent: Thursday, March 01, 2001 12:44 AM
> > Subject: [CAD_CAM_EDM_DRO] Re: Fly cutter on Sherline.
> >
> > > Hi John,
> > >
> > > I haven't seen the MicroMark catalog yet (URL?), but I CAN say that
the
> > > table doesn't rotate fast enough! "jaw of the mill"? a collet in the
> > > spindle? You are probably seeing a fly cutter cutting something on
the
> > > rotary table or indexing table. It could be they are cutting a gear,
> > > with a gear tooth profile ground on the "lathe tool bit". That would
> > > explain it, I think!
> > >
> > > Let us know, I'm curious!
> > >
> > > Alan KM6VV
> > >
> > > e.heritage@... wrote:
> > > >
> > > > Hello group,
> > > >
> > > > I recieved a catalog from Micro Mark today. I order this about
five
> > days or so ago and it's come all the way from America, which makes me
laugh
> > when I took it to be a rather cheapo company looking at what they sell.
I've
> > order supposidly 'free' catalog with 'free' postage from a lot of
massive
> > companies for them to NEVER arrive! And when they boast about them being
> > free only for them to not send you the thing it gives a very bad
impression
> > of them as a whole. Thinking about that I have been recieving about four
or
> > five radom faxes recently from 'The new bible', 'Win a playstation'....
etc
> > > >
> > > > Anyway, the point of the mail. In there catalog they have a
picture
> > of the Sherline mill with the indexing table addon. But in the jaw of
the
> > mill is a sort of cylinderical clamp with a lathe tool in it. The table
is
> > not rotating, it's not blurred, but the bar clamped in it appears to
have
> > been turned down by the lathe tool. Do these table rotate fast enough to
do
> > this? On the accesories page I found something that looks very similar
to
> > the tool in the jaw of the mill called a Fly Cutter. If I've got this
mixed
> > up would there be anyway to clamp something into the mills jaw and then
use
> > a tool on the bed to turn it a bar?
> > > >
> > > > Thanks,
> > > >
> > > > John
>
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