Electric Twist-tester 17

Electric twist tester Branca 17 allows analysing the twists no. in S or Z direction of single and plied yarns

Twist directions in SZS or ZSZ are selectable with toggle switch to set the direction of motor rotation

Automatic test end with proximity sensor to stop motor operation during untwist-retwist test method ASTM 1423 for single yarns.

The reading of twisting no. in S or Z direction through the counters helps the operator to have an instant reading of twisting no. of the sample under examination.

The left side dial counter shows the thousands and hundreds of twists, while the right one the tenths and units of twists.

The control panel of the tester allows the user to switch twist direction in S or Z, to select the test method in Untwist-Retwist or Direct counting and to adjust motor speed with external potentiometer during the test running.

On the left side the elongation movable equipment it is included the elongation scale, equipped with index lancet, while the pretension weights can be loaded to the pretension tray according to the yarn count of the sample under examination.

The elongation scale shows clearly the behaviour of yarns during untwist, and it can be analysed the yarn maximum elongation thanks to its double measuring scale expressed in millimetres and inches.

This elongation movable equipment can be shifted transversally by the operator along instrument basement and fixed at the desired length always expressed in millimetres or inches, e.g. 0 - 50 cm for the standard fixing the desired distance length between the two clamps.

TEST METHODS:

• Untwist-retwist according to UNI ASTM D 1423
• Direct counting according to UNI EN ISO 2061, ASTM D 1423

INCLUDED:

• Separation needle, to separate the plied and multi-plied yarns during the untwist;
• Magnifying glass, to check the yarn under examination during the untwist;

• Standard sample length:
• 0…50 cm
• Extended model with sample lengths:
• 0…1 m
• 0…2 m

• Manual twist-tester 18
• Electronic twist-tester 61

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