Meggitt VM600 Hardware Manual

VM600 MPS hardware manual (standard version) MAMPS-HW/E 7 - 17
Edition 17 - February 2018
Shaft relative expansion
PROCESSING MODES AND APPLICATIONS
7.9.2 Double shaft taper method
(1) Description
Two probes are used in this configuration, with each probe facing one side of a double shaft
taper (see Figure 7-13). This solution is simple and effective, allowing large measuring
ranges if the taper angle is small (for example, for a taper angle of 5°, the measuring range
is increased about nine-fold).
This method allows the measuring range to be extended by a factor of 1 / sinα:
ΔL = ΔG1 / sinα =
ΔG2 / sinα
=> 2ΔL = (ΔG1
 ΔG2) / sinα
=> ΔL = (ΔG1
 ΔG2) / 2sinα
finally,
ΔL = [ (GAP1
 GAP1
i
)  (GAP2  GAP2
i
) ] / 2sinα
where GAP
i
is the initial gap value.
Figure 7-13: Two proximity probes mounted near a shaft fitted with a double taper

Meggitt VM600 Specifications

General

Brand	Meggitt
Model	VM600
Category	Measuring Instruments
Language	English