Archive of the former Yahoo!Groups mailing list: Homebrew PCBs

----- Original Message -----
From: "Alan King" <alan@...>
To: <Homebrew_PCBs@yahoogroups.com>
Sent: Thursday, December 15, 2005 11:24 PM
Subject: Re: [Homebrew_PCBs] Re: The verdict on the quiet Dremel?


> soffee83 wrote:
>
>>--- In Homebrew_PCBs@yahoogroups.com, "Mike Young" <mikewhy@s...>
>>wrote:
>>
>>
>>>After squaring the axis to the table, you can swing a bent wire in
>>>the spindle to square it to the table. The height of the free end
>>>above the table should be the same through a full circle.
>>>
>>>
>>
>>That sounds good (and easy)! It sounds just like the procedure in my
>>radial saw manual, where you rotate the arm with the arbor lightly
>>scraping the table.
>>
>>
> It sounds good only if you want to see if your drill is perpendicular
> to the table. I don't generally care if it's exactly perp. to the table
> or not, I want it true to the motion so it doesn't snap bits.

Good Lord, Alan. :)

Yeah, you're right. Square to the table is meaningless if the motion axis is
skewed. I misread your instructions, and forgot the pivoting arm context.
That's your fault, though, as the writer.

Truth to tell, PCBs are soft and very forgiving. Sharp carbide at speed cuts
through it like... soft, fresh, Butternut white bread comes to mind as I
poke at the boards. Snapping a bit seems about as likely as the White Sox
taking the pennant next year. (Of course it's possible, but not something
you think seriously about.)