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Within 0.3 mm
❷
3-4. Preparation for the use of the AW-3 device
WARNING :
In the case you use the AMS-221F△△3020RSW (provided with AW-3 device) model of sewing ma-
chine, detach the cover and carry out preparation for the use of the AW-3 device.
The AW-3 device uses an optical sensor. In order to protect the AW-3 device against malfunction,
neither install the AW-3 device at any place that is exposed to direct sunlight such as a window side
nor orient it to such a direction that it is exposed to direct sunlight.
3-4-1. Attaching / removing the AW-3 device cover
It is necessary to remove the front cover ❶ in order to set up the bobbin thread or carry out mainte-
nance. Remove the cover ❶ as described below.
❷
Loosen six setscrews ❷ on the right and left side faces of the AW-3 device.
1)
Slightly shift the cover ❶ upward, then carefully draw it toward you.
2)
Install the cover ❶ reversing the removal procedure.
Be sure to attach cover ❶ for the sake of safety when performing sewing.
❶
❸
❶
– 5 –
1. Fix the throat plate auxiliary
cover ❸ so that is higher than
the throat plate ❷ (within 0.3
mm). When it is lower than
❸
the throat plate ❷ , needle
breakage or the like due to the
defective feed will be caused.
2. Confirm by putting a ruler or
the like that the throat plate
auxiliary cover ❸ is horizon-
❸
tally installed. If not, throat
plate auxiliary cover ❸ and
lower plate ❶ come in contact
partially with each other, and
abnormal worn-out will be
caused.
❷
❷
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