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Single Point Diamond Turning Cutting Force Analysis

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jmdlok

Electrical
Joined
Nov 21, 2017
Messages
10
Location
GB
Hi there,

I performed some SPDT of Si (111) and am looking to analyse the cutting force data obtained.

Unfortunately, the force readings stopped midway through, and I had to reset the machine and restart the force measurements (see long blue line in attached image).

I end up obtaining the following result for the tangential cutting force:
2017-12-18_16_45_33-Figure_1_j09gln.png


With the following parameters:
2017-12-18_17_09_42-spdt_lab.ods_-_Excel_iy4sx9.png


What I'm curious about is, why does the force continually increase in a linear fashion, despite the fact that the parameters AND depths of cut are changing?
Also, I understand that the force measurement must start again from 0 after being reset (because the machining also restarted), but why does it never reach the force that it ended on (25.5N)?
 
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