Hi
You could try the wet drilling process produced by Scandrill in Sweden.
This process injects a small quantity of desmear lubricant to the drill
bit which completly clears debris

In message <[log in to unmask]>, Shredder
<[log in to unmask]> writes
>Hi, I am an employee of Preagitzer Industries Inc. We have been having some
>problem with caked debris on a couple of our drill machines (Excellon Mark
>4's). The caking effect was showing up on a few jobs that were using .016,
>.0145 and smaller sized drill bits. We switched to an aluminum coated
>backup material and started taping down all sides of our panels. We thought
>the problem had ceased, but to our regret, it hadn't. It did minimize the
>frequency of this annoying anomoly, so that was nice. My hope is that there
>is another way to eliminate caked debris altogether. We are also going to
>try using entry foil that doesn't hang off the edges of the panels (I think
>that's the problem), but we can't know for sure until we try. We are using
>up alot of time taping down all 4 sides of the panels on each and every
>round of every job with the said drill bit sizes and I would like to find a
>better way to deal with the problem. I hope I have given enough info to get
>an answer quickly. I am 2 months into the PCB Fabrication Industry and
>though I read my IPC and ISO Instruction books faithfully, I am still
>extremely green. I hope someone can help as this hinders my ability to work
>and get some studying in at the same time...hehe
>
>Thank you so much.
>
>The Shredder
>
>P.S.
>Mucho kudos to IPC for their services to the industry, it's employees and
>the internet. I have been learning so much from this service and am
>extremely greatful for  the help that I get. ROCK ON! ;>

-- 
justin kelly

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