Homebrew PCBs

PK,
	 The way I sharpen my carbide tip is to rub it back and forth, while turning it, on a diamond hone. Kind of like manually sharpening a pencil by using sandpaper. Then I check the tip under a magnifying glass to see how far it's gotten. I've never added any weight to my scratcher, but it sounds like a good idea.

*Brian

-----Original Message-----
From: onenastyviper [mailto:oneNastyViper@...]
Sent: Sunday, March 20, 2005 12:46 PM
To: Homebrew_PCBs@yahoogroups.com
Subject: [Homebrew_PCBs] Re: "Twist" on an old method of PCB making.




Hi guys.

I am using an HP 7475A for scratching using a modded pen and solid 
tungsten-carbide bit (a bit from a Wickes tile scribe) any ideas on 
how to sharpen this bit??
Also, what are the advantages to adding weight to the bit?? How much 
max weight?


PK







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