HEIDENHAIN TNC 620 User Manual page 129

Tools | Tool data
Determining the tool length with a gauge block
You can only set the preset with a gauge block if the tool
reference point is at the spindle nose.
Place the preset on the surface you want to touch off
with the tool. This surface might have to be created first.
To set the datum with a gauge block:
Place the gauge block on the machine table
Position the spindle nose next to the gauge block
Gradually move in Z+ direction until you can just slide the gauge
block under the spindle nose
Set the datum in Z
To determine the tool length:
Insert the tool
Touch off the surface
The control displays the absolute tool length as the actual
position in the position display.
Determining the tool length with a calibration pin and a tool setter
To set the preset with a calibration pin and a tool setter:
Clamp the tool setter onto the machine table.
Bring the flexible inner ring of the tool setter to the same height
as the fixed outer ring.
Set the gauge to 0
Move the calibration pin onto the flexible inner ring.
Set the datum in Z
To determine the tool length:
Insert the tool
Move the tool onto the flexible inner ring until the gauge displays
0.
The control displays the absolute tool length as the actual
position in the position display.
HEIDENHAIN | TNC 620 | User's Manual for Setup, Testing and Running NC Programs | 01/2022
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