Strobel VTD410EV-SEPC1, Operating Instructions Manual

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5.2.1 Knee lever
By means of the knee lever the partial cup opening needed for the swivelling of
the gathering device is operated. The front cup opens up to the previously set
extent (setting see point “3.6.2.2 Mounting of pneumatically controlled shaft” in
mechanics instruction). The gathering device swivels down between insole and
upper, the front cup is closed. The whole process is done automatically, sewing
can be continued.
5.2.2 Gathering (left hand treadle)
After having placed the gathering device between insole and upper, the
differential feed can be operated by stepping on the left hand treadle. The more
the treadle is pressed down the more material is gathered. However, the
gathering effect can be limited to a certain value by means of the limit screw
138.0275 at the crank (Fig. 14).
As described in point “0 Threading”, additional thread tension device 938.0196
is actuated automatically during the gathering process. The higher thread
tension can be set depending on the material.
Also, if necessary, little extra fullness e.g. at the ball part can be gathered
during sewing by just operating the left hand treadle (without using the
gathering device or the knee lever respectively).
Fig. 14
After the gathering process (when reaching the next mark at the shoe) the
sewing process is stopped again briefly,
The knee lever is operated again, the front cup opens briefly, the gathering
device swivels up, the front cup is closed, and the sewing process can go on.
Then operate the right hand treadle as described in point “5.1 Right hand
treadle” and remove the sewn part.
This process can be repeated at any time.