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Requirements:
- Fixture to determine bobbin case removed from postition 1 and screwed in at
postition 2.
- Tension meter switched on as described in Chapter 3.3.3.
- Define the required tension meter settings (chapter 3.4)
- Select the desired material characteristic (chapter 3.4.1)
- Bring the tension meter into the desired measuring position and carry out a zero
adjustment as described in chapter 3.5.1, if required.
To insert the process material:
- Slip the bobbin case with the full lower-thread bobbin onto the fixture to determine
bobbin case
- Properly insert the lower thread from the bobbin into the bobbin case.
- Thread the lower thread through the first ceramic eye,
- and then through the measuring rollers
(see material path symbol on front side).
It is important to assure that the lower thread runs smoothly between the
measuring rollers.
- Thread the lower thread through the second ceramic eye,
- and clamp it in the rubber groove
of the take off roller.
3.3.3 Measuring the Lower Tension
To measure the process material:
- Press the ON / OFF button to switch on the motor-driven take off roller.
The tension meter starts measuring.
- The display shows the measured tension values.
You can simultaneously set the desired lower tension at the corresponding setscrew of
the bobbin case.
To remove the process material:
- Press the ON / OFF button to switch off the motor-driven take off roller.
- Remove the lower thread from the measuring rollers
and cut it off at the take off roller
with the supplied scissors.
Lower thread
Measuring roller
Take off roller
2. ceramic eye
1. ceramic eye
Fixture to
determine
bobbin case
Bobbin case
Position 1
Position 2
fig. 3.5.3
