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2010-02-11 by AnnonC
I'm looking for a method to deburr my ground vias to smooth the drill hole for copper plating. I do RF prototypes and the PCB has a lot of ground vias. In the past, I used 2 pass drill to drill the hole, the 2nd pass, one 1 mill smaller but it doesn't seem to help much. I can increase the diameter of the via hole up to 50 mils. Thanks Lanny
2010-02-11 by Leon Heller
On 11/02/2010 18:29, AnnonC wrote: > I'm looking for a method to deburr my ground vias to smooth the drill hole for copper plating. I do RF prototypes and the PCB has a lot of ground vias. In the past, I used 2 pass drill to drill the hole, the 2nd pass, one 1 mill smaller but it doesn't seem to help much. I can increase the diameter of the via hole up to 50 mils. Use sharp drills at the proper speed. Leon
2010-02-11 by Stefan Trethan
And if that isn't enough an aluminium cover plate and or suitable bottom doubler can be used, or so I am told. ST
On Thu, Feb 11, 2010 at 7:43 PM, Leon Heller <leon355@...> wrote: > On 11/02/2010 18:29, AnnonC wrote: >> I'm looking for a method to deburr my ground vias to smooth the drill hole for copper plating. I do RF prototypes and the PCB has a lot of ground vias. In the past, I used 2 pass drill to drill the hole, the 2nd pass, one 1 mill smaller but it doesn't seem to help much. I can increase the diameter of the via hole up to 50 mils. > > Use sharp drills at the proper speed. > > Leon >
2010-02-11 by Googlemail
Some say using a thin sheet of 0.2mm aluminium on top of the board - an entry board, can help. I get a piece of wet and dry sand paper and go over the board before i start the plating process. Trev
----- Original message ----- > I'm looking for a method to deburr my ground vias to smooth the drill hole for > copper plating. I do RF prototypes and the PCB has a lot of ground vias. In the > past, I used 2 pass drill to drill the hole, the 2nd pass, one 1 mill smaller > but it doesn't seem to help much. I can increase the diameter of the via hole up > to 50 mils. > > Thanks > Lanny > [Non-text portions of this message have been removed]
2010-02-11 by AnnonC
Leon, My drill speed is 10,000 RPM. How fast do you think a proper speed should be? And what kind of sharp drill do you recommend? Thanks Lanny --- In Homebrew_PCBs@yahoogroups.com, Leon Heller <leon355@...> wrote:
> > On 11/02/2010 18:29, AnnonC wrote: > > I'm looking for a method to deburr my ground vias to smooth the drill hole for copper plating. I do RF prototypes and the PCB has a lot of ground vias. In the past, I used 2 pass drill to drill the hole, the 2nd pass, one 1 mill smaller but it doesn't seem to help much. I can increase the diameter of the via hole up to 50 mils. > > Use sharp drills at the proper speed. > > Leon >
2010-02-11 by AnnonChicken
Thanks Stefan. I'm going to try that technique. --- In Homebrew_PCBs@yahoogroups.com, Stefan Trethan <stefan_trethan@...> wrote:
> > And if that isn't enough an aluminium cover plate and or suitable > bottom doubler can be used, or so I am told. > > ST > > On Thu, Feb 11, 2010 at 7:43 PM, Leon Heller <leon355@...> wrote: > > On 11/02/2010 18:29, AnnonC wrote: > >> I'm looking for a method to deburr my ground vias to smooth the drill hole for copper plating. I do RF prototypes and the PCB has a lot of ground vias. In the past, I used 2 pass drill to drill the hole, the 2nd pass, one 1 mill smaller but it doesn't seem to help much. I can increase the diameter of the via hole up to 50 mils. > > > > Use sharp drills at the proper speed. > > > > Leon > > >
2010-02-11 by Stefan Trethan
Sharp carbide drills. The proper speed is as fast as you can ;-) 30 or even 50k RPM would be nice, the slower the RPM the slower the feed should be. The drills must be sharp or the RPMs won't do no good. ST
On Thu, Feb 11, 2010 at 10:46 PM, AnnonC <Lnphoenix@...> wrote: > Leon, > > My drill speed is 10,000 RPM. How fast do you think a proper speed should be? And what kind of sharp drill do you recommend? > > Thanks > Lanny > > --- In Homebrew_PCBs@yahoogroups.com, Leon Heller <leon355@...> wrote: >> >> On 11/02/2010 18:29, AnnonC wrote: >> > I'm looking for a method to deburr my ground vias to smooth the drill hole for copper plating. I do RF prototypes and the PCB has a lot of ground vias. In the past, I used 2 pass drill to drill the hole, the 2nd pass, one 1 mill smaller but it doesn't seem to help much. I can increase the diameter of the via hole up to 50 mils. >> >> Use sharp drills at the proper speed. >> >> Leon >> > > > > > ------------------------------------ > > Be sure to visit the group home and check for new Links, Files, and Photos: > http://groups.yahoo.com/group/Homebrew_PCBsYahoo! Groups Links > > > >
2010-02-11 by Leon Heller
On 11/02/2010 21:46, AnnonC wrote: > Leon, > > My drill speed is 10,000 RPM. How fast do you think a proper speed should be? And what kind of sharp drill do you recommend? My drill is 18,000 rpm and I use reduced shank tungsten carbide drills. Leon
2010-02-12 by AnnonChicken
Thanks guys. I think I can go up to 24K RPM max. I'm ordering some aluminum foils and tungsten carbide drills to try it out. If it works, I will post here as a follow-up. Lanny --- In Homebrew_PCBs@yahoogroups.com, Leon Heller <leon355@...> wrote:
> > On 11/02/2010 21:46, AnnonC wrote: > > Leon, > > > > My drill speed is 10,000 RPM. How fast do you think a proper speed should be? And what kind of sharp drill do you recommend? > > My drill is 18,000 rpm and I use reduced shank tungsten carbide drills. > > Leon >
2010-02-12 by DJ Delorie
Note that foils only work if your drill can press down on the foil next to where it's going to drill, to keep it against the copper.