This
one is for fellow machinists and engineers: a newly arrived Dixi 0.1mm
end mill. The cutting blade is 100 x 100 microns or as thick as human
hair.
To
put it in perspective, I took a photo of it next to the finest Japanese
0.25mm pen tip, with regular ballpoint pen above them.
But
this is not the scary bit: due to its size, our endmill will have to
spin at 50,000 RPM at the bottom of a 700 kg spindle column travelling
at the speed of 1G with sub-micron positional accuracy and to start,
stop and reverse instantaneously. That spindle movement action draws 60
Amp of peak current per phase.
The equivalent of your car going from 0 to 100kms in 2.47 seconds.
