Cutting Blocks - Duerkopp Adler 558 Operating Instructions Manual

Double chain stitch buttonhole machine
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2.13 Cutting Blocks

A trueing (filing) of the cutting block becomes necessary,
when the cutting block has been too strongly cut into by the cutting knife.
when two different cutting knife forms have worked on the cutting block (Illus. 2).
When trueing the cutting block care is to be taken:
The cutting block must be so filed that the impression of the knife blade is to
be seen everywhere very fine and exactly uniform ( Illus. 1).
The height of the cutting blocks may only be reduced by a maximum 1.5 mm
through filing.
To achieve a uniform distribution of the cutting pressure the cutting block must hit
parallel onto the cutting knife (see sketch).
One-sided cutting pressure, particularly in the area of the eye, can cause the
cutting knife to break off.
Illustration 1 shows a correctly filed, illustration 3 a badly filed cutting block.
After trueing one cutting block, all other cutting block used must also be reworked
to the same height dimension. Only in this way can, after a cutting block change,
work continue with the same cutting pressure. Otherwise there is a danger of
breaking the cutting knife by a change of the cutting block !
Malfunctions during cutting
After a longer period of operation the sharpness of the cutting knife is reduced. The
blade is blunt and the knife no longer cuts precisely in spite of a correctly trued cutting
block.
Send the knife to one of the DÜRKOPP ADLER AG for reworking.
Caution Risk of Injury !
Pull the mains plug.
Remove the cutting block only with the machine turned off.
ATTENTION !
The trueing of the cutting block must be conducted very
precisely.
Use only flawless, straight bastard files !
57

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