Anita Garudan GPS/G-3525 Series, User'S Manual And Spare Parts Book

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MP00800EN_161116 22
11. ADJUSTMENT OF SPEED OF MOVEMENT OF THE TRIMMING LEVER
Correct function of pneumatic cylinder of trimming is done by air pressure in value 0.55 - 0.6
MPa. Regular length of bottom thread after trimming is 25mm.
The trimming is controlled by below parameters:
- parameter 21 – decelerate stitch. It indicates the number of stitches before trimming.
Default value is 2 stitches.
- parameter 22 – decelerate speed – trimming speed, 1 movement. default value is 400 rpm.
- parameter 41 – turning ON feed dog (starting time of thread feeder). It sets the position of
the needle when the moving knifes is taking the needle.
Default value if 400 for shuttle hook and 550 for rotary hook.
- parameter 42 – turning OFF feed dog (operating time of thread feeder). It sets the position
of needle bar when the moving knife is cutting the thread.
Default value is 100 for shuttle and rotary hook.
The speed of movement of the rod is decisive for correct moment of taking the thread by
moving knife. It is usually adjusted with change of trimming speed, parameter 22. Short end
of bottom thread after trimming or cranking of bottom thread is done by high speed of
movement of moving knife. The thread is not taken by low speed of the knife.
Increasing or decreasing of the speed of knife is done by the valve (1 ) on the pneumatic
cylinder ( 2) which is placed under tshat must be he cover in the baseplate. The rod is
connected with pneumatic cylinder by hinge bearing ( 3), Fig. 39.
Fig. 39
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