Darcy,
Just my unqualified comments, sure the router bit is grounded but all
the ground fiberglass particles aren't! The fiberglass coming off of the board
will surely be carrying a whopping charge. I have used a PCB milling machine
(the bit is also grounded) and the fiberglass dust just floats and sticks
(electrostatically) to everything.
I would be sure that an ionizer/de-ionizer is a wise additional.
Sincerely,
Brad Velander
Senior PCB Designer
Northern Airborne Technology
1925 Kirschner Rd.,
Kelowna, BC, V1Y 4N7.
tel (250) 763-2329 ext. 225
fax (250) 762-3374
-----Original Message-----
From: Darcy Davis [mailto:[EMAIL PROTECTED]
Sent: May 13, 2005 3:54 PM
To: PEDA (E-mail)
Subject: [SPAM] - [PEDA] PCB routers and ESD - Email found in subject
We're currently looking into PCB routers for gentle depanelization of some
mechanically sensitive PCBs. Machining FR4 produces very large charge
buildups that can lead to ESD issues if not handled properly. On some
routers, an ionizer is included to minimize the risk of damage due to ESD.
Other machines don't have ionizers, and I'm told they are unnecessary since
the spindle is fully grounded. Does anybody have any experience with PCB
routing that could give me an relatively unbiased opinion?
Thanks,
Darcy
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