[Sewing] incident report! artisan 618 needle bar replaced.

[miloh]

Textile area Machine report:

TL;DR
In the future, when changing the needle on the artisan 618, be careful not
to remove
the set screw all the way to replace a needle.


Kyle reports that today the needle fell out of the needle bar on the
Artisan
618-1SC, (the artisan 618 is a $2k walking foot, an awesome artisinal
straight stitch
sewing walking foot machine at Noisebridge).

When trying to reinstall the needle the set screw wouldn't tighten. Kyle
determined this
occured because the threads on the needle bar are stripped.

It looks like when the needle was being replaced another time,  the needle
bar set screw
was removed all the way when replacing the needle. When the set screw was
reinserted,
it was cross threaded and stripped, so today wouldn't tighten to hold the
needle.

Fix :

The needle bar had to be replaced (~$17 at Apparal City in SF's SOMA
district)
FYI, the apparal city tech offered to repair this onsite for $90. Kyle just
bout the part and repaired himself in about 2 hours.

Even though Kyle replaced the needle bar and set screw with a new one, this
turned out
to be a complicated repair involving disassembly and timing of the Artisan
618. One must
remove both presser feet, the feed dog, the needle plate, and the hook
assembly.

When the hook and needle bar is removed, you are undoing the timing of the
machine --- the hook rotates and the needle bar plunges in close timing
with a
half mm of tolerance. The machine has to be retimed for this repair, which
is part of what
makes it a difficult repair.


Thanks Kyle!

-r. miloh alexander
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