Feed Rate; Time Resolution; Evaluating The Recorded Curves With The Cursor - HEIDENHAIN TNC 415 Technical Manual

Feed rate

With a step function as the output signal, the feed rate is entered in [mm/min]. The programmed
feed rate dictates the acceleration after the ramp.

Time resolution

The recording time ranges from 2.4576 sec. to 24.576 sec. (set time x4096). The time set between
0.6 and 6 ms is the cycle time for recording curves. The recording time is overlaid beneath the grid.
The beginning and end of the image are also displayed relative to the trigger point (cursor line T1).
Channels 1 to 4
A total of 4 channels can be selected for recording. The axes can be randomly assigned to the
channels - this is done using the ENT key after selecting the entry position.
For each channel a characteristic curve is selected from the following variables:
Feed rate
Speed
Speed controller
Position
Trailing error
Analogue voltage
Channel
Recording is activated with START (soft key). This calls a soft-key row in which the sole option is
STOP. Recording can be interrupted at will. Saved channels cannot be displayed at the same time as
recording is in progress because synchronization between the saved channels and the channels
currently recording is not possible.

Evaluating the recorded curves with the cursor

Whereas the complete memory contents are displayed at the start, the time window selected
before the start is displayed after the image is restored. The time to trigger point is shown as T1 at
the left of the display. Beneath it is the absolute value in [mm/min], [mm] or [mV].
If the CURSOR 1/2 key is used to overlay a second cursor for time T2, then this cursor can also be
moved using the arrow keys on the TNC control panel. The time that is displayed as T2 is the
difference from T1. The numerical value overlaid underneath is also the difference from the value
associated with T1. The display for T2 and the second cursor are deleted using the END or "Cursor
1/2" soft key.
01.98 TNC 407/TNC 415/TNC 425
V ACTUAL Actual value [mm/min]
V NOMINAL Nominal value [mm/min]
S ACTUAL Actual value [mm]
S NOMINAL Nominal value [mm]
N INT Nominal/actual difference for speed controller
[mm/min]
N ACTUAL Actual value [mm/min]
N NOMINAL Nominal value [mm/min]
D DIFF Trailing error for speed control [mm]
U ANALOGUE output analogue voltage [mV]
OFF Channel is displayed
SAVED Channel is saved
3 Machine interfacing 11-19