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6.0 Tips for use
16.1 Examples of correct choice of saw blade
⇒ Table on side protection cover of machine
Important:
Blunt saw blades must be replaced. This applies in
particular when cutting iron. Full cutting power and
accuracy is achieved only if the recommended quality of
saw blade is used.
Useful note:
If for economy reasons you wish to continue to use a
blunt saw blade, for example for cutting iron, attach a
smooth support approx. 20 mm thick to the saw table
plate of the machine using twin-sided adhesive tape,
and continue to cut on this. By raising the saw table in
this way you can progressively use up more of the saw
blade.
Working with plastics:
To prevent the material melting when cutting, mask off
the cutting line with plastic adhesive tape.
16.2 Feed pressure
The feed pressure to be exerted on the workpiece must
always be directed obliquely from top to bottom, else
the workpiece may jump. Some workpieces require a
strong feed pressure.
16.3 Stop
In general stops are not used when sawing with
fretsaw blades. Fretsaw blades will move off the
cutting line if the workpiece is force-guided.
Accurate sawing requires:
- a sharp saw blade
- a thin, accurate cutting line
- correctly applied, bright light
16.4 Straight cutting
• Always hold the workpiece at an angle of 1 to 5º (the
angle depends on material, saw blade type and blade
tension).
16.5 Notes on sawing metal
• First deburr metal workpieces to be cut on all sides
and flatten these off carefully so they sit flat.
• Either glue thin or small workpieces (e.g. thin sheets)
onto a 5 mm thick plywood block (using contact
adhesive or twin-sided adhesive film) or place these
between two pieces of plywood and secure against
slipping with pins.
• Then cut the workpiece out together with the plywood
(do not choose sheets that are too thick).
• Use
-
fretsaw blade no. 1 to 5 for
-
soft NF metals, e.g.
- aluminium (sheet)
- soft copper (sheet)
-
soft brass (sheet)
If necessary you can also use metal saw blades
numbers 5 to 9.
• Before sawing, coat the cut line with lubricating oil
(universal oil).
• Use
- metal saw blades nos. 1, 5, 9 or 12 for
- hard NF metals e.g. for
- hard aluminium (sheet)
- hard copper (sheet)
- hard brass (sheet)
- iron (sheet).
• Before sawing, coat the cut line with cutting oil or
paste.
• Despite using saw blades of top quality, depending on
hardness iron will cause greater blade wear.
17.0 Speed selection
(only on motors with electronic speed control)
• In general, low speeds are better if accuracy,
guidance of the saw blade or durability of the saw
blade are important, whereas higher speeds are
generally better for higher working output and reduced
cutting times.
• Thin or fragile materials are best handled at low speeds.
• Extra thick materials or plastics are best handled at
medium or low speeds.
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