5. The tension measuring head
It contain inside an aluminium plate with two bonded DMS-strain gauges. At this
plate a yarn roll is mounted for measuring the thread. The yarn tension
leads to a bend of the aluminium plate. This bend can be measured through the strain
gauges (see Picture 5).
Moving
roll
Firm rolls
Alu-case
Connecting
cable
Analysis electronic
Aluminium plate
The thread is first guided
upwards through the firm
roll, then it goes around the
moving roll, which is connected to
the aluminium plate, and finally it is
guided around the second firm roll.
The tension signals, which are
produced from the tension measuring
head, are sent to the
A/D-converter-interface. The interface
changes the signals in discreet digital
values and send them to the
computer.
The interface makes equalise and zero adjustment of the tension measuring head
possible to guarantee a very high precision.
Every interface is adjusted to the tension measuring head. If the tension measuring
head is changed, the interface has to be adjusted again.
DMS-
strain gauge
Instruction Manual FRICTION MEASURING SYSTEM CPT/CTC / Version 2.0 – 06.2020
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