Happy HCS-1201-30, Maintenance Manual

Page: 98 / 204

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Exchange of fixed knife
3-6-7
1. Remove needle plate.
2. Remove fixed knife.
3. Exchange fixed knife.
4.Tighten fixed knife pushing to forward as full as possible.
<Notice>
In case moving knife and the left side of fixed knife
overlaps excessively when closing, adjust the position of
fixed knife slightly to the right direction.
5. Referring to [3-6-8 Adjustment of moving knife and
fixed knife],check how well thread is cut and adjust,
then finish this process.