Cutting blank PCB's to size

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Anyone know of a cheap but easy way to cut blank fibreglass PCB's to size?
Previously I have been using a very sharp cutting knife and steel ruler
(very timely task!).  Is there such tool out there that isn't massive and
doesn't cost the Earth that can do this?  Has anyone tried using a
guillotine used to cut paper/cardboard?  (i wonder if that would work?).
Any ideas?
P.S  It needs to be a nice clean, straight cut.

Regards,
Jason.



Re: Cutting blank PCB's to size


During my apprenticeship, the factory used to heat up the PCB in a oven
before cutting them on a guillotine



Anyone know of a cheap but easy way to cut blank fibreglass PCB's to size?
Previously I have been using a very sharp cutting knife and steel ruler
(very timely task!).  Is there such tool out there that isn't massive and
doesn't cost the Earth that can do this?  Has anyone tried using a
guillotine used to cut paper/cardboard?  (i wonder if that would work?).
Any ideas?
P.S  It needs to be a nice clean, straight cut.

Regards,
Jason.




Re: Cutting blank PCB's to size


by the way, why you not put
cut fiberglass Pcb
into google and see what you get?

Anyone know of a cheap but easy way to cut blank fibreglass PCB's to size?
Previously I have been using a very sharp cutting knife and steel ruler
(very timely task!).  Is there such tool out there that isn't massive and
doesn't cost the Earth that can do this?  Has anyone tried using a
guillotine used to cut paper/cardboard?  (i wonder if that would work?).
Any ideas?
P.S  It needs to be a nice clean, straight cut.

Regards,
Jason.




Re: Cutting blank PCB's to size


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We used to use a workshop -sized guillotine. ie. one used for cutting sheets
of tin plate etc.

Ken



Re: Cutting blank PCB's to size



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Hi, thanks for your input. Yeah we used to do that at school when I went...
it was so quick and efficient!
Jason.



Re: Cutting blank PCB's to size



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Go to a local sheetmetal shop where they'll probably cut it for nothing on one
of their guillotines.



Re: Cutting blank PCB's to size


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of their guillotines.

   They won't, if they've done it before.  Fiberglass dulls the cutting
edges on a sheet metal shear in a hurry.
--
?

Michael A. Terrell
Central Florida

Re: Cutting blank PCB's to size


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That's what I thought, I have a small guillotine with tool steel blades
and I wasn't ever planning on cutting glass PCB's with it.

The OP might be better off with a table mounted power saw.

Re: Cutting blank PCB's to size


On Sat, 01 Oct 2005 01:38:07 GMT, "Michael A. Terrell"

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one of their guillotines.
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The wear would be insignificant for the small number of cuts that the op would
be requiring,
particularly when guillotines are used to cut various metals with different
guages, repeatedly,
between sharpenings.


Re: Cutting blank PCB's to size


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be requiring,
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guages, repeatedly,
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   If you say so.  Around here no one will let you use their metal
sheers to cut fiberglass. I worked for a company that did asset
recovery, where they had a really nice foot operated metal shear that
they used to remove the gold plated fingers from PC boards. A couple
days after they were sharpened you couldn't cut thin aluminum, let alone
steel.  They would wear the blades so bad they had to be replaced.

--
?

Michael A. Terrell
Central Florida

Re: Cutting blank PCB's to size



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I agree.  Years ago the place where I worked used to use a sheet metal
guillotine to cut fibreglass boards.  Mind you that all we ever cut with it
for just the same reasons Michael has outlined.

For small runs I clamp a steel straight edge onto the board and use a box
cutter blade to score a deep line on both sides of the board, then snap them
apart.  This method works okay provided you don't have very thin tracks near
the edge of the board as insufficient scoring prior to snapping can create
microfractures in the copper tracks.

Cheers,
Alan



Re: Cutting blank PCB's to size


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I've been doing that for the last few boards I've done, although I tend to
get impatient and go for the snap a bit early and end up with stressed
fibres along the edge of the board - it cleans up fairly easily on a full
sheet of sandpaper on the bench, but I think I'll try a Falcon drill nibbler
on my next board and see how it goes.




Re: Cutting blank PCB's to size



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be requiring,
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guages, repeatedly,
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Are you sure of that?
What are the optimum respective cutting angles for shear blades for
metal and fibreglass?




Re: Cutting blank PCB's to size



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would be requiring,
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guages, repeatedly,
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Did you read the first 17 words of my sentence? Emphasis on "small number of
cuts".


Re: Cutting blank PCB's to size



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cuts".

Yep, you made a fudge statement that I know from various  cutting
devices isn't necessarily true. some blades do not like even being near
foreign material.


Re: Cutting blank PCB's to size



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cuts".
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True enough for the foreign material. To answer your previous post first, it's
been >25yrs
since I was working with a 10' sheet metal guillotine, and I don't recall the
blade angle exactly, but
it must have been only a degree or two. Much greater than that and the grips
that held the metal
down on the bed during the cut would allow the metal to rotate along the cut,
and you'd have a
curved cut instead of a straight cut. I wouldn't have a clue what the angle
would be for a guillotine
that specialises cutting copper/fibreglass laminates, as I've never seen one,
but someone here
may be able to tell us. But then again, it's not really relevant to the original
post, is it?

The op'er has the option of either taking someone's advice or rejecting it. He
can take his
boards to a sheetmetal shop, or a pcb manufacturer (they do still exist in
Australia), cut
it with a knife and a ruler, nibbler, etc, so long as he can get it done with
the minimum of fuss.



Re: Cutting blank PCB's to size


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Try a hand-held nibbling tool, with the job finished off with a fine file.
Works for me....



Re: Cutting blank PCB's to size


I'd be inclined to try a very fine toothed blade in a jig saw - might work -
if a lot need to be done then a band saw might be the way to go

David

Sir Nigel Puke-Fuui wrote:

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Re: Cutting blank PCB's to size



message
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work -
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A band saw works well except it hammers the crap out of the blade. A dremel
with a cut off disc also works but heaps of nasty f/glass dust. I woder how
well an old style paper guillotine would work - the ones with the heavy
wooden base & 3/8" thick blade.
There are small guillo's for trimming pcbs but they cost a couple of grand.
rob



Re: Cutting blank PCB's to size



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Thanks for your input.
Yeah, I was thinking about a heavy duty guillotine too. Thing is, I don't
really want to spend $100-300 for one and then find out it doesn't work!
Damn things... so expensive!



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