Homebrew PCBs

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@...m
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