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From:	"Markus Hitter (mah AT jump-ing DOT de) [via geda-user AT delorie DOT com]" <geda-user AT delorie DOT com>
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Date:	Fri, 18 Sep 2015 09:50:32 +0200
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> On Thu, 17 Sep 2015 18:08:13 -0400
> DJ Delorie <dj AT delorie DOT com> wrote:
> 
>> So if I need to be precise, I have to be very careful, and understand
>> the limits of the machine.

Depends on what you understand by "high speed". I did my first boards at
90 mm/min and it worked (with some patience). Then for a long time I ran
at 200 mm/min. Now, with the new Mantis Electron I do 600 mm/min. A Gen7
board needs some 15 minutes for the isolation milling this way. Plus 2x
10 minutes for the drilling, plus 3 tool changes with surface probing at
about 5 minutes each.

http://www.reprap.org/wiki/File:Mantis_Electron_Milled_TSOP-28.jpeg
http://www.reprap.org/wiki/File:Gen7Board_1.4_isolation_milled_PCB.jpeg

The biggest problem I face is burring. It needs careful fine-tuning of
the milling spindle to get burr-free results.


Am 18.09.2015 um 08:59 schrieb Nicklas Karlsson:
> The wood grow then in absorb water from the air.

Humidity isn't really a problem. Wooden machines don't shrink and grow
like a balloon, even less in the one or two hours a machining needs.


Markus

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Dipl. Ing. (FH) Markus Hitter
http://www.jump-ing.de/

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