Triggers; Trigger Threshold - HEIDENHAIN TNC 415 Technical Manual

3.4.2 Triggers

The following entries are possible:
•
FREE RUN Recording is terminated manually
•
SINGLE SHOT Records a memory content - initiated by trigger condition.
•
CHANNEL ... Starts recording when the trigger threshold of the selected channel is
exceeded.

Trigger threshold

The trigger threshold for the selected channel is entered as a numerical value in the following units:
•
Linear speed [mm/min]
•
Position [mm]
•
Rotational speed [mm/min]
•
Trailing error [µm]
•
Analogue voltage [mV]
Edge
Triggering with rising (positive) and falling (negative) edge.
Pre-Trigger
Defines the start of the recording as a % of the total recording time; possible entries are 0%, 25%,
50%, 75% and 100%. Press the ENT key to select.
3.4.3 Recording
The recording parameters to be edited are selected with the arrow keys. The values for FEED RATE
and TRIGGER THRESHOLD are entered with the numerical keys. The values for all other recording
parameters are selected by pressing the ENT key.
Output
In the Manual mode you can choose between the set ramp and a step function for outputting a
nominal value.
The step function is only possible with digitally controlled axes and is necessary for trimming the
speed controller. The step function and the oscilloscope recording facility can also be used to
determine the maximum acceleration of the machine when the provisional input value is not known.
In the MDI or Automatic modes acceleration is always by the set ramp.
11-18 TNC 407/TNC 415/TNC 425 3 Machine interfacing 01.98