What depth ?
Stick form letters ?
if part marking.
D bit single flute, 50 deg included angle, point dia 0.1/0.3RPM = fastest
Z plunge rate =200mm/min
XY feedrate =300mm/min
Cutting Depth= 0.1mm deep
the broarder the angle - the stronger the point, but also the less detail on deeper engraving
check by rotating the tip on a projector, back of the cutter must not come outside the cutting edge