Beisler 1911-4 - Manual (Page 53)

- C 53 -
Short Seam Automat 1911-4 / 1912-4 Working Instructions Beisler Automated Sewing Equipment
C.5
Maintenance
C.5.5 Machine set-up
Checking the rest thread monitor:
The rest thread monitor is checked using a photocell. If
the messages on the display do not match the filling state
of the bobbin, the photocell sensitivity must be checked.
1. Fig. 22: Fill bobbin to half its capacity so that filling state
indicators
2 of upper chamber 1 are covered.
2. Insert bobbin and sew until display shows: SPOOL: 004
m.
Keep sewing until display shows: SPOOL EMPTY
3. Remove bobbin, unwind rest thread and measure re-
maining length (should be 0.5 m).
Adjusting the photocell:
•
If the thread on the bobbin is sewn off over the rest
length of 0.5 m without the message SPOOL EMPTY
being displayed, the photocell sensitivity must be in-
creased:
• Rotate potentiometer at photocell in clockwise di-
rection.
• If the message SPOOL EMPTY is displayed even
though the bobbin contains more than 0.5 m thread,
the photocell sensitivity must be reduced:
• Rotate potentiometer at photocell in counter-clo-
ckwise direction.
Fig. 22
Fig. 22