Fox F20-140A Manual De Instrucciones página 33

FUNCTIONING
After correctly blocking the piece to be cut in the vice,
start the machine and let the motor run at its maximum
speed. Slowly lower the disc (A), until it comes into
contact with the piece to be cut (B). Exert a constant
pressure on the disc to avoid any skipping that could
make the disc oval and thus compromise cutting quality
and also break the disc.
The result is better when the workpiece is placed in
order that the disc cuts with a minimum contact arc.
Keep on exerting a constant pressure during cutting.
Keep on exerting the same pressure also when you
are about to finish the cutting. Normally when you are
finishing the cutting the contact arc between the disc
and the material to be cut increases and this would
require an even greater push.
A slowdown would involve an overheating of the metal
and big burrs would appear.
The figure illustrates the piece cut at the end of the
work. Caution: During work the disc wears out and
must be replaced. The number of cuttings you can
carry out with the disc, so as cutting quality can
considerably vary depending on how the cuttings are
carried out. Quick cuttings wear the disc faster but
reduce the burrs and workpiece's colouring. This is
visible especially when cutting small-bore pipes.
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