Homebrew PCBs

On Tue, 25 May 2010 16:02:07 -0400, you wrote:

>Is a dremel adequate for drilling pcbs using carbide drills? I know 
>it isn't good enough for pcb routing, but just for drilling?? If not, 
>what is a good, small, reasonably priced alternative?

A dremel will work with carbide drills and the dremel stand.

Having said that, the runout (wobble) on a dremel is rather nasty, and
limits your ability to do fine holes (say #75 or so).  Drill wobbles
too much and makes too big  a hole.  The drill press attachment is
wobbly at best.

I have a (more expensive) Proxxon.  It's the industrial model, 120
vac, 20K rpm.  Much better bearings, better collet.  Have a bit of a
homemade drill press stand, works reasonably well, no idea how good
the proxxon stock model works.

I like the Proxxon better, bought it after the Dremel (hand model, 70
some dollars, nice kit, good for what it does, not as good for pcb
drilling.)

Harvey

>
>Mark
>
>
>At 05:59 PM 5/24/2010, you wrote:
>>On Mon, 24 May 2010 22:40:31 +0200, you wrote:
>>
>> >I think even with a single sided board the light shining through the
>> >center of the pad might be enought to locate it depending on PCB
>> >material. Or one could turn it over, of course.
>>
>>
>>In my experience, trying to locate holes and align them, no.  You
>>wouldn't b happy with the results.  I'd say either drill from bottom,
>>right side up, or drill from top, top side down.
>>
>>Problem with turning the board over is not the dust collection, it's
>>the large (and bulky) drill mechanism.  Clamps are not always needed,
>>but might help.  Hydraulics are not needed, but a spring and solenoid
>>might help.
>>
>>It does sound like an interesting project.
>>
>>Harvey
>>
>> >
>> >ST
>> >
>> >On Mon, May 24, 2010 at 10:37 PM, Mark Lerman <mlerman@...> wrote:
>> >>
>> >> I was thinking that the board would have to be upside down when you
>> >> drilled it because the camera would have to see the top of the board,
>> >> but you're right, there will be pads on the bottom of the board,
>> >> too.  Yes, camera on bottom is probably better, and certainly easier
>> >> to implement. I've got a video otoscope that's made for close focus -
>> >> have to give it a try.
>> >>
>> >> Mark
>> >>
>> >
>> >
>> >------------------------------------
>> >
>> >Be sure to visit the group home and check for new Links, Files, and Photos:
>> >http://groups.yahoo.com/group/Homebrew_PCBsYahoo! Groups Links
>> >
>> >
>> >
>>
>>
>>------------------------------------
>>
>>Be sure to visit the group home and check for new Links, Files, and Photos:
>>http://groups.yahoo.com/group/Homebrew_PCBsYahoo! Groups Links
>>
>>
>>
>
>
>------------------------------------
>
>Be sure to visit the group home and check for new Links, Files, and Photos:
>http://groups.yahoo.com/group/Homebrew_PCBsYahoo! Groups Links
>
>
>