The use of tension meters ensures optimum wire tension

- Increases workpiece accuracy, reduces machine downtimes
- Optimum use of production times
- Increased lifetime of wire tensioning brakes

You should therefore check the wire tension regularly

EDM wires are sensitive “tools” and any disturbance in
the course of the wire becomes apparent in the cut.
Depending on the operating time and load feed traces
and other signs of wear will occure on mechanical
parts and cause vibration of the wire. It is therefore
necessary to regularly check the running smoothness
of the electrode wire. This is done with a tension
meter. The correct tension of the EDM wires reduces
wire vibration and ensures the maximum accuracy of
your machines.

Handling:
Checking the tension must be carried out on the
running wire in setup mode with the generator
switched off. An unsteady deflection of the tension
meter pointer is also a sign of possible winding faults
in the electrode wire coil.
Wire EDM manufacturers recommend testing the EDM
wire tension at least once a week.

Selection criteria:
For most conventional wire EDMs, the use of a test
instrument with an analog display is sufficient. For
thin-wire EDMs, a digital display tension meter is
recommended since the wire tension must be precisely
adjusted within a very small tolerance of just a few cN.