HEIDENHAIN 548431-05, User Manual, Page: 156 / 722

Machine mode of operation | Load monitoring (optional)
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HEIDENHAIN | MANUALplus 620 | User's Manual | 12/2017
Keep in mind that load monitoring is not possible for
hanging axes without counterweight!
Note that load monitoring only works to a limited extent
if the load changes are small. Therefore, monitor the
drives that are subjected to significant loads, such as the
main spindle.
When face turning with a constant surface speed,
remember that the load monitoring feature will monitor
the spindle up to a maximum of 15 % of the nominal
acceleration defined in the machine parameters. Since
acceleration increases as a result of the change in
rotational speed, the control only monitors the period
after the first cut!
The load monitoring function compares current
utilization values with maximum limit values. For proper
comparison, the utilization values must not be too low.
Since the utilization depends on the cutting conditions,
the following example is provided for your guidance. It
illustrates the required values for the machining of steel:
Longitudinal turning : Cutting depth > 1 mm
Recessing
: Cutting depth > 1 mm
Drilling into solid material : Hole diameter > 10 mm