Homebrew PCBs

proxxon also says they have good ball beared axles and gronded steel collets.

the grinding hand tools are relatively cheap (30-40eur).

they also have ready made drill presses from which they also say the spindles are good (and can easily 
drill 0,5mm).

i don't know it that's true.

i will see a local tool shop tomorrow to see what they carry.
and what i think of ot when seeing it.

(one can asess the quality for pcb drilling by viewing the tip of a good tool (ideal is carbide bit) ?)

regards
stefan



20.05.2003 10:46:25, Markus Zingg <m.zingg@...> wrote:

>>I originally bought a Dremel, but it was so out of round, that 
>>the tip of the drill looked blurry when it was running. Well that 
>>just confirms you get what you pay for. The Dremal used cheap 
>>aluminium collets, because that's all what's needed for the 
>>indented purpose. The industrial die grinders, such as BOSCH 
>>GSS27 have hardened steel ground collets. The collets are 
>>constructed so they always seat precisely in position when 
>>tightened up. Another compact straight die grinder is the Matabo 
>>G500, but not sure of prices. The GSS27 cost me Australian $240 I 
>>think. So probably around $120 USD. It was my uncle who 
>>recommended the BOSCH grinder as a PCB drill, he has owned one of 
>>these for 20 years. So it should last me for ever and a day. Of 
>>course I can take it out of the drill press and use it as a die 
>>grinder if I every need too.
>>
>>Funny thing was that one day I visited this PCB manufacture who 
>>specialized in prototypes and small runs. At the corner of the 
>>shop I saw one of these GSS27 laying on the bench, and so I 
>>started talking to the owner about it. It turns out they use the 
>>exact same drill motor in their manual drilling machines as I had 
>>used.
>
>How about the Proxxon tools? I find them quite handy for various tasks
>when it comes to Homebrew PCBs'
>
>http://www.proxxon.com/ lists the products available. I'm using the
>Drillstand MB 140/S to drill the holes, and the "Bench Circular Saw KS
>230" to cut FR4 materials. There you need the "Solid carbide saw
>blade" of course but using this one cutting FR4 becomes fun.
>
>So far I'm quie happy with these but since I'm not that long in the
>business I would apreciate feedback from this list with regard to
>these.
>
>Markus
>
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