Re: W.E.T.[CAD_CAM_EDM_DRO] Re: Angle Iron Ways

Aluminum Extrusions?

bob mcknight





To: Neil Gillies <neil@...>,
CAD_CAM_EDM_DRO@yahoogroups.com
Priority: normal
From: wthomas@...
Date sent: Sun, 20 Aug 2006 23:09:17 -0400
Subject: W.E.T.[CAD_CAM_EDM_DRO] Re: Angle Iron Ways
Send reply to: CAD_CAM_EDM_DRO@yahoogroups.com

[ Double-click this line for list subscription options ]

Hi Neil and All:
I have set back waiting to see if anyone would mention the
common table saw. I have machined, wood, aluminum, brass, and steel
on a 10 table saw. Also, the 7 degree conical disk sander that Sears
sold worked great for producing a good finish. If you are doing and
extra long piece you can use a longer plate attached to the rip fence.
Just run three guide plates switching them to match like you would if
you were scraping in a set of flat plates. In this way you can get a
long straight guide plate. If you don't have the conical sanding disk
you could use a dish type wheel and tilt the arbor. Then, right on
center line of the saw arbor you use a slid dresser to dress the wheel
vertical. If you work at it you should be able to get parts 2 to 3
meters long that are straight within a hairs (.002- .003) Try it you
will like it.
GOD'S BLESSINGS
Bill

To: CAD_CAM_EDM_DRO@yahoogroups.com
From: Neil Gillies <neil@...>
Date sent: Sun, 20 Aug 2006 23:25:03 +0100
Subject: [CAD_CAM_EDM_DRO] Re: Chinese Whispers - Was Angle Iron
Ways
Send reply to: CAD_CAM_EDM_DRO@yahoogroups.com


Hi All

amazing how a simple question on how to "grind" a stupid piece of
angle iron turns into a debate on "something completely different" :-
)))

OK, to comment on some of the answers to my "quest" ...

1 Fred's solution of rotating 45 deg to use the built-in 90 deg angle
falls out of my brief - whatever that brief might have been :-)). This
is essentially cheating :-))) To be truthfull, what I want is the
angle iron vertical - and I WANT a 90 deg V formed on the edge ! Thank
you Fred for the "penultimate" solution - perhaps I should offer a
reward here :-))

2 OK on Dave's "how to make a flat surface" routine - interesting
stuff (once I found the eventual link :-)))))) This is at least VERY
useful. At 50 bucks/pounds/shekels/pence an hour, I would not want to
pay someone to true my ways using this method however :-))

3 On Graham's esoteric solution - I use the term esoteric in a non-
demeaningfull way Graham :-))))))) I SERIOUSLY looked at this
solution. And it is a nice solution (perhaps I shouldn't start a
sentence with "and" BTW - my one-armed English teacher would have hit
me with a leather strap - another story maybe :-) My ONLY problem with
this is time - has ANYONE considered how long it takes to remove 3mm^2
of mild(ish) steel via this option ???? (the width of the angle is 3mm
- roughly 1/8" for the 5% of the the world that doesn't use the metric
system :-)))))) My calculations are VERY ROUGH, but at 10A/m^2 it
would take something like 50-odd hours to remove ONE 45 deg side of a
1m length. It's not personal Graham - I LIKE watching paint dry :-)))
I DO like this solution and have even taken to playing with
Vectorworks on my Mac (:-) looking for something that could reduce the
overall time required to do this. I considered a continuous flush
system rather than a bath - whacking up the current would of course
improve the removal rate but as I recollect from previous attempts at
producing "the Queen's head" from a coin on a plate from a prior test
(about 30 years ago admittedly :-), it ends up looking like a dose of
the pox :--))

4 Stuart's box section also falls out of the brief - see 1 :-) Thank
you for your solution Stuart.

All I want is to make an accurate 90 deg V on a 50mm angle iron -
nothing more, nothing less - there just has to be a way (pun intended
:-))

On a point, I spent a fabulous 2 week holiday in Egypt some years ago
- while walking through a "bazaar" someplace south of Cairo, I came
across a guy sitting on the floor of his small "shop" - about 2m wide
by 3m long - no door. He was sitting on the floor - a piece of
"chipboard" with two lumps of thick plywood screwed/nailed to the ends
- between which he had an electric motor commutator (ex washing
machine by the look of it) held between two woodscrews (not sure if
the pitch was metric or imperial - probably metric if you go by
percentages :-)) He was truing the commutator with a VERY crude
cutting tool - a simple bow with a string line across the shaft
producing the rotation using his left foot. These commutators were
IMMACULATE - I doubt if I could machine copper to this level on my
crappy chinese lathe!

To this end, there just HAS to be a SIMPLE solution to this that
requires no leadscrews/steppers/geckos/Mach2/3/4/5/6/7/8/9/10^10,EMC/
ECM/PDM/VC/VD or scar or other extraneous pieces of firmware/ hardware
to produce - falls down from soapbox :-)

Cheers

Neil

__________________________________________________________
___

Neil D. Gillies Tel: +44 (0)
1383-823489
iGull.co.uk Mobile: +44 (0)
771-4330793
11 River View
neil@...
Dalgety Bay, Fife http://
www.igull.co.uk
Scotland KY11 9YE http://www.sea-
gull.demon.co.uk





Addresses:
FAQ: http://www.ktmarketing.com/faq.html
FILES: http://groups.yahoo.com/group/CAD_CAM_EDM_DRO/files/
Post Messages: CAD_CAM_EDM_DRO@yahoogroups.com

Subscribe: CAD_CAM_EDM_DRO-subscribe@yahoogroups.com
Unsubscribe: CAD_CAM_EDM_DRO-unsubscribe@yahoogroups.com
List owner: CAD_CAM_EDM_DRO-owner@yahoogroups.com, wanliker@...,
timg@... Moderator: pentam@...
indigo_red@... davemucha@... [Moderators] URL to this
group: http://groups.yahoo.com/group/CAD_CAM_EDM_DRO

OFF Topic POSTS: General Machining
If you wish to post on unlimited OT subjects goto:
aol://5863:126/rec.crafts.metalworking or go thru Google.com to reach
it if you have trouble. http://www.metalworking.com/news_servers.html

http://groups.yahoo.com/group/jobshophomeshop I consider this to be
a sister site to the CCED group, as many of the same members are
there, for OT subjects, that are not allowed on the CCED list.

NOTICE: ALL POSTINGS TO THIS GROUP BECOME PUBLIC DOMAIN BY POSTING
THEM. DON'T POST IF YOU CAN NOT ACCEPT THIS.....NO EXCEPTIONS........
bill List Mom List Owner


Yahoo! Groups Links









--
No virus found in this incoming message.
Checked by AVG Free Edition.
Version: 7.1.405 / Virus Database: 268.11.1/421 - Release Date:
8/16/2006