Homebrew PCBs

I was contemplating making a small table-saw style saw with a 
HSS slitting saw blade. Is that a plan doomed to failure?

Grant

--- grantfair2001 <grant.fair@...> wrote:
> I was contemplating making a small table-saw style saw with a 
> HSS slitting saw blade. Is that a plan doomed to failure?
> 
> Grant

I think High Speed Steel will wear out pretty quickly. Why not
carbide tipped?

I'm kicking myself, there was a small 7 1/4 inch tablesaw at the
thrift store a few days ago for about $25.

Steve Greenfield

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Hey All,
 I use a small bench shear but have been tempted to try a diamond tile saw
from Home Depot. They look like small table saws but use a diamond coated
blade.
I suspect the "wet" version would work better because the epoxy in the
boards will probably clog the blade if used dry. 
These saws can usually be found for under 100 bucks.
Denny

I cut my finished boards using a "laminates" blade on my Delta 
Contractor Saw.  While this is a big saw, it very acurate and 
repeatable.  I can also mount a routing bit either on my Ryobi small 
hand drill, or on my bigger drill press and just feed the material 
along, using a piece of hardwood as a fence for acuracy.
Jack

A diamond blade band saw for stained glass works good and a small 
scroll saw works even better if you can find the diamond blades. Many 
years ago I picked up a broken diamond band saw blade from a glass 
shop and cut it in pieces for use on my scroll saw. I brazed small 
tips on each end to allow clamping in the scroll saw. This setup 
really works good and I have been using this same blade and saw for 
over fifteen years.

Another idea is to use a pin router. The router tool is fixed over 
head and a pin is pushed into the table after drilling a hole in line 
with the router head. The table pin should be the same diameter as 
the router bit. The router head is lowered until the bit just clears 
the table mounted pin. A fixture is made from masonite, plastic or 
other easy to machine material. Line up and clamp the fixture to a 
drilled board and use at least two existing holes in the board as a 
guide to drill into the template. Make the fixture holes slightly 
smaller and use cut to length drill rods for pins. The board will now 
fit over these pins and can be pushed along to table mounted pin and 
routed.

Now you have a device to rapidly cut your finished boards to size. 
A fence can also be used for making straight cuts. This beats 
shearing if you are making more than a few boards. Almost any shape 
can be cut.  You can also stack up to three boards on this type of 
fixture depending on the spindle power.  I have even seen this done 
on a regular drill press using the highest spindle speed. With this 
arrangement you can even route internal holes and shapes if the 
spindle can be moved up and down.

Tom

At 06:22 AM 4/22/02 -0500, milwiron@... wrote:

>  I use a small bench shear but have been tempted to try a diamond tile saw
>from Home Depot. They look like small table saws but use a diamond coated
>blade.
>I suspect the "wet" version would work better because the epoxy in the
>boards will probably clog the blade if used dry.

I think you may be onto something here.  Those saws cut fairly slow but 
that should not be a problem.  The blade is more abrasive than saw-toothed 
- that means that it turns the PC material into dust rather than chips like 
my carbide toothed saws.  But because they cut wet, there is little chance 
the dust will escape into the air.

I hope someone tries it and lets us know if and how well it works!

dwayne


Dwayne Reid   <dwayner@...>
Trinity Electronics Systems Ltd    Edmonton, AB, CANADA
(780) 489-3199 voice          (780) 487-6397 fax

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In a message dated 21-Apr-02 23:21:13 Central Daylight Time, 
grant.fair@... writes:


> Is that a plan doomed to failure?
> 

Perhaps not if you use a CARBIDE blade of at least 4" in dia. with a SFM of 
at least 400 FPM. 



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In a message dated 22-Apr-02 21:05:04 Central Daylight Time, JanRwl@... 
writes:


> Perhaps not if you use a CARBIDE blade of at least 4" in dia. with a SFM of 
> at least 400 FPM

OOPS!  Correction!  30,000 FPM!!!!!!!!!!!!


[Non-text portions of this message have been removed]