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 *************************************************************************** * TechNet mail list is provided as a service by IPC using SmartList v3.05 * *************************************************************************** * To subscribe/unsubscribe send a message <to: [log in to unmask]> * * with <subject: subscribe/unsubscribe> and no text in the body. * *************************************************************************** * If you are having a problem with the IPC TechNet forum please contact * * Dmitriy Sklyar at 847-509-9700 ext. 311 or email at [log in to unmask] * ***************************************************************************