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When Using The Special Needle Plate (needle Plate -rb); Adjusting The Cutter Installation Height - Brother HE-800B Service Manual

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7-10-1. When using the special needle plate (needle plate -RB)

The special needle plate is used to prevent the cutter from getting stuck in the material and not returning.
1. The special needle plate has a narrow cutter groove of 0.3 - 0.4 mm, so use the accessory positioning plate (1) to adjust the
cutter installation position.
Note: If this adjustment is not made, the cutter may touch the needle plate, and damage to the cutter may result.
2. Install the cutter holder (2) to minimize any play in the cutter during cutting.

7-11. Adjusting the cutter installation height

Adjust so that the upper thread scissors and the cutter do not touch when the cutter is pushed down by hand. (Fig. A → Fig. B
in "7-10. Adjusting the cutter installation position")
Install the cutter with the screw (1) so that the tip A of the cutter blade is aligned with the top of the needle plate when the cutter
is pressed down by hand to its lowest position.
If using the flat cutter (2), install with the screw (1) so that there is a clearance of 1.5 - 2.0 mm between the cutter and the top of
the needle plate.
* After adjusting, push the upper thread scissors back to its original position (Fig. A in "7-10. Adjusting the cutter installation
Note: ・When the cutter is driven by the solenoid, the movement will be approximately 2 mm greater than that shown in
the illustration.
・If the cutter does not cut properly, the cutter may get stuck in the material and not return. If this happens, replace or
sharpen the cutter.
Lowest position
Top of needle plate
Lowest position
Top of needle plate
1.5 - 2.0 mm


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