HEIDENHAIN TNC 640 User Manual page 747

Manual Operation and Setup | Presetting without a 3-D touch probe
17.6 Presetting without a 3-D touch probe
Note
When presetting, you set the control display to the coordinates of a
known workpiece position.
All manual probe functions are available with a 3-D touch
probe.
Further information:
", page 772
Refer to your machine manual.
The machine tool builder can disable presetting in
individual axes.
Preparation
Clamp and align the workpiece
Insert the zero tool with known radius into the spindle
Ensure that the control is showing the actual positions
Presetting setting with an end mill
Select the Manual operation mode
Move the tool slowly until it touches (scratches)
the workpiece surface
Setting a preset in an axis:
Select the axis
The control opens the PRESETTING Z= dialog
window
Alternative:
Press the SET PRESET soft key
Select the axis via soft key
Zero tool in spindle axis: Set the display to a
known workpiece position (here, 0) or enter the
thickness d of the shim. In the tool axis, offset
the tool radius
Repeat the process for the remaining axes.
If the tool in the tool axis has already been set, set the display of
the tool axis to the length L of the tool or enter the sum Z=L+d.
HEIDENHAIN | TNC 640 | Conversational Programming User's Manual | 10/2017
"Presetting with a 3-D touch probe
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