ABB REX 521 Operating Manual page 14

Vent lever
C u t t i n g To o l O p e r at i n g G u i d e
1 4
3. Start the cutting procedure by pushing the
guiding faces of the cutting head to the cut-out
edges: to the top edge and to the right edge
side if the right edge widening/cutting is valid.
For your safety, keep your hands on the power
unit, never on the cutting head.
Beware of the sharp edges!
4. Push the operating switch as long as the sheet
metal part has been cut off.
Be careful with the flinging offcuts, especially
if the offcut gatherer is not used.
Do not push the operating switch too long as
it may cause maximum pressure in the power
unit and result in additional force with vent
lever use.
5. Push the vent lever to ensure that the punch is
released after each cut.
In some cases, additional force is needed to
push the vent lever.
6. Make five cuts 1...5/6...10 one below the other (see
figure 4).
Shake the cutting tool in between the cuttings
1...10 to arrange more space for the offcuts
inside the gatherer.
It is recommended to make overlapping cuts of 1...3
mm to avoid sharp edges in between the cutting
junction points.