2. Function and structure of the Measuring device
Computer
Reel
Tension
measuring
head
Fournisseur
Cone
Thread course
Tension
device
Driving barrel
A/D-converter
1. The thread will pulled off from the cone by the fournisseur. Turning the driving conus
(half moon) of the fournisseur the thread stock can be adjusted. After that the thread
on the fournisseur can be pulled off with nearly no tension.
2. A driving barrel, where the thread is turned around several times, move the yarn.
The barrel is driven through a DC-motor, whose rotation speed can be regulated
independent from the load. Because of this the thread can be pulled off with a
constant, prescribed speed.
3. After the fournisseur the thread goes through the tension device. The friction, which
arises on the thread going through the tension device, results in the necessary
tensile force, which pulls the thread with prescribed speed through the yarn brake.
4. This tensile force of the thread is measured in the tension measuring head.
The tension measuring head (consist of the DMS
1
-strength-sensor) converts the tensile
force in electric voltage, which is directly proportional to the tensile force.
5. The voltage signals from the tension measuring head goes to the A/D-converter, which
converts the signals in discreet digital values, which are received and processed from
the computer.
6. The thread, which is coming from the driving barrel, is up winded on the reel.
1
DMS =”Strain gauge“
Picture 3: Schematic structure
Instruction Manual FRICTION MEASURING SYSTEM CPT/CTC / Version 2.0 – 06.2020
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