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I’m having good results with my dremel – it’s just very hard to see where the bit is in relation to the pad when it’s on. If it were a convenient push button operation I could position the bit, then just lift a little, hit button, and go. I’ve not had any drifting issues at 30k RPM with a quick up and down motion.
I thought maybe putting a small laser or LED under the center of the base to illuminate center above might help a bit… need to find one among my stuff here.
From: Homebrew_PCBs@yahoogroups.com [mailto:Homebrew_PCBs@yahoogroups.com]
Sent: Monday, June 20, 2016 4:19 PM
To: Homebrew_PCBs@yahoogroups.com
Subject: Re: [Homebrew_PCBs] Accurate drilling, cutting?
If you have occasion to find a used Cameron micro drill press, don’t hesitate to buy it. They are extremely precise and can run up to 30,000 RPM. I bought a model 164 with the standard 1/8” Yukiwa drill chuck, and had a very difficult time measuring any runout with a Starrett Last Word DTI run against the shank of a carbide drill bit. Specified spindle runout is only 0.0002”, or 0.05 mm.
The only drawback, if there is one, is that the maximum depth of work is a bit limited, but much less so than with the Dremel. I’ve only broken bits by bumping the work piece against the side of the drill.
All the best!
Bob