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13 Cards in this Set
- Front
- Back
WHAT IS COVERED IN THE NAVAIR A6-215PC-MEB-000 WP 003
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PRINCIPLES OF OPERATION
INDUSTRIAL SEWING EQUIPMENT |
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Oscillating sewing machines have a sewing hook that?
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rocks back and forth
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Rotary sewing machines have a sewing hook that makes?
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two complete revolutions to complete on stitch
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Two Oscillating sewing machines are the______
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31-15 and 7-33
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When a machine is in constant use it should be oiled?
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twice a day
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If a machine skips stitches or frays or breaks it is because?
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The needle is not in proper relationship with the shuttle
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If the needle is in proper time with the shuttle the point of the shuttle should be where in relation to the eye of the needle?
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1/16 in above the eye of the needle
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If the feed dog is set to high what will happen
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It may cut or fray the material
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The bobbin will rotate in what direction if the bobbin case has been threaded properly?
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clockwise
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commonly used navy Rotary sewing machines are the?
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111 w series 150-155
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I right twist or left twist thread used in sewing machines
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left twist is used. right twist tends to unravel.
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Is Z twist Left twist or Right twist?
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Left twist
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Is S twist Left twist or Right twist?
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Right twist.
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