Homebrew PCBs

We were talking about the same picture - there is no clamping bar. 
sorry to beleager the point but it aint there.  period.  I was trying
to be polite and not disagree directly but guess that wasn't effective.

As to the usefullness of the maligned clamping bar, I've toured PCB
fabrication shops and they all used shears with a clamping mechanism
to initially cut their stock. 

I have a shear that has one and I find it very useful for both sheet
metal and PCB material.  There is a gap between the blade and the bar
that allows one to visually align the material.  Align, clamp, check
alignment, cut.  5-10 seconds.  perfect every time.  

You don't *need* anything, you can break the PCBs by karate chops or a
chain saw if you want but a shear with a clamping bar makes for a very
fast, clean and accurate cut.  I will continue to use it to great
effect.  There are many ways to cut PCB material, each to his own.

--- In Homebrew_PCBs@yahoogroups.com, "turbojet" <turbojet@k...> wrote:
> For cutting PCB then You don´t need the clampingbar, It´s mostly
useful when cutting sheetmetal... 
>   ----- Original Message ----- 
>   From: Stefan Trethan 
>   To: Homebrew_PCBs@yahoogroups.com 
>   Sent: Thursday, September 22, 2005 9:23 AM
>   Subject: Re: [Homebrew_PCBs] Re: cutting PCBs
> 
> 
>   On Wed, 21 Sep 2005 22:02:49 +0200, turbojet <turbojet@k...>  
>   wrote:
> 
>   > If You look really good, You´ll se the "clampingbar"´it´s
located behind  
>   > the lever...
> 
> 
>   i have my doubts about the usefulness.
>   Anyway, my shear has none, and i checked again for tendency of the
board  
>   to slide or rotate and there is none.
>   A clamp could easily be added, but it would obstruct vision.
> 
>   ST
> 
> 
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