3022CS AUTOMATIC UNIT
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18.1.4 LOWER KNIFE CHAGE
Remove the movable knife group, loosening the fixing bolt with a 10 mm key and unscrewing the pressure adjustment
screw.
Loosening the three (3)fixing screws, with a 4 mm Allen key.
Remove the knife and clean carefully the support.
Insert the new knife e reassemble the whole.
Is always recommended to change the knives in couple to avoid bad working.
18.2.UNSTITCHING DEVICE
The user MUST turn the unit off following procedure 5. HOW TO STOP THE MACHINE.
Here is a list of the most common adjustments that must be carried out on the machine in case of bad working.
18.2.1 UNSTITCHING LATTEN ADJUSTMENT
Loosening the couple of screws on the latten holder slide, is possible to adjust the position of the latten itself.
Check if the position of the spreader group is correct and then check if:
· the latten is completely leaned against the support of the spreader, with the slide free to carry out the two movements.
· the latten is able to cover with its comb the spreader hook avoiding the formation of the chain stitch.
· that the distance between the latten with its comb, and the upper part of the lower crochet is 0,5 mm at least.
· that the distance between the needle, at Lower Dead Center, and the frontal side of the comb is of 2 mm.
18.2.2. CYLINDER-SLIDE SUPPORT ADJUSTMENT
The unstitching cylinder moves a slide, to which the unstitching latten is fixed.
To avoid the slide to take the axial play, a "U"-shaped support is assembled, inside which the cylinder-slide union support
runs.
Check that the "U"-shaped support touches for all its length the union support without hindering the movement.
Summary of Contents for 3022 Series
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