Homebrew PCBs

Hi!

Today i finally got my Proxxon Minidrill.
It is a really fine tool, i believe it is really precision work.

they advertise with the following:
High concentric accuracy (max. run out 3/100ths of a mm).
i put in a drill and couldn't detect any out of round at the tip.

it is also very silent, also at 20000 rpm.
It costs 98eur here, but i really think it is worth the money.

it has ground collars and a ground shaft, they only have three slots and are
good hardened steel.

they also know that they are good, advertise that a lot etc. (they say drill
chucks are horrible).


it has a 20mm throat for mounting in a drill press.
i will make a holder for it (and the pivoting press we talked about before).


I can only recommend this tool, sure i have no long-term experience but the
few holes i drilled (by hand) now are very satisfying, also the momentum at
low revolutions is much better than at the cheap machines.


i had many pc problems here (the psu blowed the output capacitors with a
bang two days ago.
i had to buy a new one. luckily nothing else is damaged (the caps will only
get blown up by too high voltage and they are directly at the output, so the
rest of the components had to survive much more than 10V at 5V and 3.3V and
much more than 15V at 12V line. really good work ASUS! this mainboard survived
a lot.) this psu malfunction may also have damaged the 2 raid disks 2 weeks
before. 
now i have to setup all the software... and then i will build the drill
press and get the plotting issue to work better.



but i had time to think:
what about making my own buzz saw for pcb?
this isn't much more than a shaft on bearings and a thread on one end.
i think the power may be transmitted by a small toothed belt.
i want to use the proxxon carbide buzz saw blade for cutting fr4.
i don't need height adjustable blade (but may be accomplished by a pivoting
frame carrying the axle, blade and the motor).


any suggestions on that?
has anyone such a small buzz saw at home? how do they transmit the momentum
to the shaft carrying the blade?



regards
stefan


-- 
+++ GMX - Mail, Messaging & more  http://www.gmx.net +++
Bitte l\ufffdcheln! Fotogalerie online mit GMX ohne eigene Homepage!

stefan_trethan@... wrote:
> Hi!
> 
> Today i finally got my Proxxon Minidrill.
> It is a really fine tool, i believe it is really precision work.
> 
> they advertise with the following:
> High concentric accuracy (max. run out 3/100ths of a mm).
> i put in a drill and couldn't detect any out of round at the tip.
> 
> it is also very silent, also at 20000 rpm.
> It costs 98eur here, but i really think it is worth the money.
> 
> it has ground collars and a ground shaft, they only have three slots and are
> good hardened steel.
> 

[snip]

That's good news, thanks for updating the group about the 
Proxxon. I have just completed version 2 of my PCB drilling 
press. This one is takes up less than half the bench area and is 
lighter, better built ,et. I will create a web page as I had done 
earlier for my old drill machine. The bearings used in the new 
machine are tapered roller bearings, which, for this application, 
are far superior than clutch thrust bearings or rod end bearings. 
The tapered roller bearings are available cheap (AUD$13/each) if 
you get standard automotive wheel bearing sizes.

Adam

thanks..

please make photos of it as soon as possible...

are this the main wheel bearings in a car?
may i take them out of a old axle?


regards
stefan

-- 
+++ GMX - Mail, Messaging & more  http://www.gmx.net +++
Bitte l\ufffdcheln! Fotogalerie online mit GMX ohne eigene Homepage!