> From: Stefan Trethan <stefan_trethan@...>
> Subject: Re: Re: How to cut circuit boards?
>
> On Tue, 23 Dec 2003 11:39:42 -0000, Mike Cowlishaw
> <mfcowli@...> wrote:
>
>> Mentioned before, I think, but another good way to cut PCBs is a
>> table-mounted jigsaw. [snip]
>
> I'm not so sure if a jigsaw is safer.
> It may be harder to cut a finger off but with all the jerky up and
> down movement unexpected things can happen.
> (e.g. if you don't hold down the pcb properly)
Since I'm cutting the PCM into quite small pieces (around 25mm square) I
clamp the pcb to a relatively heavy chunk of wood -- this means the
vibration is minimized and it's a lot easier to control. I would do the
same with a circular saw.
> But you are right, the blade did cut rather good, though i never got
> very straight ;-)
> I see you have some guiding there, very good idea i think.
Yes for straight cuts the fences that come with the table mount are very
helpful. I've also done one circuit board with a curved edge (to fit in a
headlamp). Jigsaw or similar is essential for that.
> What do you think about the bearings and the glass dust?
> i think the linear bearing on the piston (or tappet? what is the
> correct word here?) will not last too long?
Good question, though I'd hope Bosch have sealed that reasonably well (given
that they sell the table to let you mount the saw in that way). Also I also
use dust extraction, so hopefully not too much dust gets near that
bearing...
Mike Cowlishaw