Baby Lock Regalia BLRG20, Руководство по обслуживанию

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Page 65
Section 17: Electronic Information - Thread Break Sensor
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IMPORTANT: The thread break sensor will not
function properly if the tensions are set too
loose. The tensions must be tight enough to
move the take-up spring past the sensor in
order to toggle the sensor on and off. When
the thread breaks, the take-up spring stops
going past the sensor and activates the alarm.
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IMPORTANT: The thread break sensor housing
is very delicate and can be crushed by the
set screw and shorted internally if tightened
too much. A special nylon tip screw is used to
help, however, it is critical that the screw be
just tight enough to hold the sensor’s position.
If the Thread Break Sensor is not functioning
properly, check the following:
• The thread break sensor has a built-in LED in the
back of its barrel.
• Remove the front nose cover screw
(3 mm hex tool)
• With the cables still connected, push the cover and
wires aside at the hole where the wires enter the
machine. The LED could be always on or always off.
• Thread the machine through the top tension, the
take-up spring, under the stirrup and through the
take-up lever.
• Pull the thread down at the take-up lever and
watch the sensor to see if it activates on when
the wire is near the sensor and off when it is not,
while looking through the hole in the front of the
machine .
• If the LED does not go on and off, loosen the
special set screw slightly and try again.
• If the LED still does not go on and off, loosen
the screw and adjust the sensor in or out until it
toggles on and off.
• If it still does not go on and off, replace the sensor.
• If the LED activates in the front, but there is still an
issue, remove the handle wheel (see page 45).
• If the front LED goes on and off at the sensor but
does not toggle at the KEYPRS LED, D22, on the
Control Board,(see page 52), then the issue may be
with the Control Board.