11. Adjusting the tension
11-1. Principles of the thread tension mechanism
1. There are thick threads to thin threads. Normal thread tension unit adjusts the thread tension by one thread
tension unit against each thread.
HZL-T100, by adopting the principle by which the tension is individually secured according to the thickness of
the thread used, enable the users to adjust the thread tension with ease.
[Principle diagram]
[Role]
· Base tension (untwisiting)
Base tension performs to remove the twisting so as the thread twisting not to enter the thread paths.
(Attached in the rear side of the arm cover.)
· Pre-tension
Pre-tension is located at clearance A to
correspond to tick thread and gives the tension
to think thread.
Thick thread is given the necessary tension
mainly by (1) + (2) + (3).
· 1st tension (main tension)
This tension basically gives the tension to thin thread.
This tension has the function of manual tension adjustment as well.
· 2nd tension
This tension is located at clearance B for medium-weight thread to correspond to medium-sized thread.
Medium-weight thread is given the proper tension mainly by (2) + (3).
2. External adjusting function to re-set the thread tension is provided for users’ choice.
The mechanism that the tension cam holds the dial can disengage the engagement of the both ratchets
by inserting a small-sized slit screwdriver or the like.
By shifting the both position in this state, re-setting of the dial granduation can be performed.
[Configuration diagram]
How to adjust
· In case adjusting the tension after assembling the front panel and arm cover is desired, the dial of 1st tension
can be adjusted because of the machine construction.
1. By inserting a small-sized slit screwdriver into the center of the groove located in the rear side of the tension
knob, the engagement of the knob and the tension cam be disengaged.
2. Adjustment can be performed by moving the tension cam or the knob to the right or left. However, the
adjustment should be performed within the 4th tooth of the right or left side.
In case the adjustment more than 4th tooth is necessary, re-check the tension components.
(For the angle, the adjustment is in the range of 15º left or 15º right. For the reference there are 4 small
holes at the rim of the knob and the angle between the respective small holes is in a unit of 15º each.)
- 1 8 -
- 1 8 -
- 1 8 -
- 1 8 -
- 1 8 -
Thread thickness and effect tension
Thread thickness
Thin
Medium
Thick
(1) Pre-tension (2) 1st tension (3) 2nd tension
(1) Pre-tension
Base tension
(2) 1st tension
A
(3) 2nd tension
B
Tooth
Tension cam
Engage section
1st tension
How to disengage
Dial
(Front)
(Rear)
Screwdriver
Aligning mark
4th tooth
15º
Small hole
15º
4th tooth
