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Troubleshooting Voyager's Thread Cut
System
On this page, you'll find useful diagrams,
animations, etc on troubleshooting and fixing Voyager's thread cutting
system.
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Moving Knife Timing Video |
Instructions: Moving Knife Fix |
See below for additional help
for the knife system. |
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Thread Cut Test
To find out if the moving and fixed knife are able to cut thread,
you can perform the test shown in the animation on the right.
Remove the needle plate, hold the moving knife open as shown, and loop
2 strands of thread over the inside crook of the knife. Allow
the knife to spring closed under the fixed knife to check how
effective cutting action is. |
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Stuck Pin Collar
If the moving knife appears to be correctly in-time but still does
not fully extend the knife, check to see that the engagement pin rises
cleanly out of its housing. As shown in the animation below, the
collar that the pin normally sits in when retracted can sometimes come
loose and rise up together with the pin.
This collar normally holds the pin steady and in place, which in turn
allows the pin to
firmly deflect as it is moved by the groove of the cam. But when
the collar slides up, out of its housing, it allows the
pin to wobble as it engages with the knife cam groove,
preventing it from effectively actuating the knife. |
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