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sharp engraving tool

bernie (220.255.7.248) - Sat May 3 11:10:39 2008

I have broken a few sharp 10° carbide tool.
I tried to engrave a 0.1mm raise feature and the feedrate was set to 20mm/min. The spindle speed is 3000.
Can anybody help and share some idea how to prevent the sharp or pointed carbide tool from breakage ?
Bernie

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