10
2
1
5
3
4
6
6.15 Replacement of the trimming knife
Caution! Risk of injury!
Replace the trimming knife only with the machine
switched off!
- Switch off the main switch of the machine.
- Put the knife in its top position, loosen the screws (1) and
shift the knife (2) downwards.
- Shift in the new knife, tighten only very slightly the screws
to have the knife in its holder (3) still slidable.
- Place the gauge (4) on the throat plate in such a way, so that
the recess number corresponds with the number on the knife.
- With a slow movement of the lever (5), lower the knife
downwards.
- Using a screw driver, turn the shaft (6) in such a way, so that
the trimming knife is in its lowest position.
- Push the free end of the trimming knife with a screwdriver,
until it bears into the recess in the gauge (4) and tighten
thoroughly the screws (1)
- Lift the trimming knife, remove the gauge, lower the trimming
knife and check the movement of the trimming knife in turning
the shaft (6).
The trimming knife must not strike in its bottom
dead centre against the throat plate insert. In the
top dead centre, the trimming knife must not leave
the cutting edge on the throat plate insert.
6.16 Setting of the trimming device for trimming
very small radii
For trimming very small radii, the trimming knife B is to be
used, it can be additionally purchased. In such case, the
setting inside the trimming mechanism must be changed. This
setting change is described in the service book.
6.17 Setting of the trimming device for trimming
thin, soft materials
For this type of trimming, the trimming knife C is to be used,
it can be additionally purchased. In such case the setting
inside the trimming mechanism must be changed. This setting
change is described in the service book.
6.18 Change of the sewing category
When proceeding to this change, it is necessary to replace the
throat plate insert (it can be additionally purchased). Together
with the insert replacement, the width of the trimmed edge is
changed - the side setting of the knife must be changed. It is
described in the service book.
6.19 Sharpening of the knives
The knives of sintered carbide are to be sharpened using dia-
mond abrasive material. A sharpening jig serving as a knife
fastener for machine sharpening or directly for hand sharpe-
ning on a whetstone (only steel knives) can be additionally
purchased. The sharpening procedure is described in the ser-
vice book.
Summary of Contents for 4182i 100 Series
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