Homebrew PCBs

On Mon, 1 Feb 2010 09:32:38 +0100, you wrote:

>There's a duty cycle on the 12V model? I didn't know that.
>Doesn't get warm enough for me to notice so I suppose it'll be OK.

They didn't mention it specifically, but the implication on the larger
(and more expensive) one was that it *was* built for continuous
operation.  

It's certainly cooler than the Dremel in the same application, wasn't
a cheap Dremel, either....

I was also concerned with the relative power of the motor.  I can
drill 0.120 holes in FR4 without a problem at 20K RPM.


>
>Probably depends a lot on the load, for example if you do some
>grinding or cutting it'll draw a lot more power than just drilling
>PCBs. But large mounting holes (over 3mm) start to show the limits of
>the 12V drill.

Ah, well, I might get one of the 12 volt ones for another project, a
multi axis mill that is somewhat in production.... one of these days.

Harvey

>
>ST
>
>On Mon, Feb 1, 2010 at 1:12 AM, Harvey White <madyn@...> wrote:
>
>> \ufffdI avoided the 12 volt proxxon because of the duty cycle. I
>> figured that the AC model was capable of continuous operation, and I
>> do a lot of drilling at one time, since I tend to do runs of different
>> PC boards.
>>
>> Harvey
>>
>
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