Help cuting brass

Hi guys, I hope someone can help me as I’m new to cnc. I have Nomad 883 and I’m trying to cut a brass plate that thickens of 0.9mm size width of 2in x 1in hight.

I’m trying to cut a name all the way through. I have atuched photo for the design below

I’m using bit from Amana
AITiN Coted 0.025" x 0.075 CH x 1/8SHK Flute Spuer end

I have used carbaid creat and add a new tool and added the bit info, the software did an automatic calculation for depth, feed and speed but un Lukly I have broken lots of bits so far

Any advise please help

Please see:

Copper and brass sheets:



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