Tool radius compensation (TRC) with lathe tools (#50 / #4-03-1)
Application
The tip of a lathe tool has a certain radius RS. By default, programmed paths refer to the theoretical tool tip (i.e., the longest measured values ZL, XL and YL). When you machine tapers, chamfers and radii, the cutter radius RS causes deviations at the contour. The tool tip radius compensation prevents such deviations.
Related topics
- Tool data of turning tools
- Radius compensation with RR and RL in milling mode
- Presets on the tool
Requirements
- Software option Turning (#50 / #4-03-1) or Adv. Spindle Interpol. (#96 / #7-04-1)
- Parameters have been defined for the tool type
Description of function
The control checks the cutting geometry with the point angle P-ANGLE and the setting angle T-ANGLE. Contour elements in the cycle are processed by the control only as far as this is possible with the specific tool.
In the turning cycles, the control automatically carries out tool radius compensation. In specific traversing blocks and within programmed contours, activate TRC with RL or RR.
- Offset between the tooth radius RS and the theoretical tool tip TIP
Theoretical tool tip TIP for tool radius compensation
- Inclined surface with theoretical tool tip TIP in the tool coordinate system T-CS
The theoretical tool tip is active in the tool coordinate system T-CS. The tool location point and the tool rotation point are at the tool tip.
- Inclined surface with theoretical tool tip TIP in the workpiece coordinate system W-CS
Only with the FUNCTION TCPM NC function with the REFPNT TIP-CENTER selection is the theoretical tool tip active in the workpiece coordinate system W-CS. The tool location point is at the tool tip. The tool rotation point is located at the tool center point.
Compensating the tool angle of inclination with FUNCTION TCPM (#9 / #4-01-1)
Notes
- The direction of the radius compensation is not clear when the tool-tip position (TO=2, 4, 6, 8) is neutral. In this case, TRC is only possible within fixed machining cycles.
- Tooth radius compensation is also possible during inclined machining.
Active miscellaneous functions limit the possibilities here:
- With M128 tool-tip radius compensation is possible only in combination with machining cycles
- M144 or FUNCTION TCPM with REFPNT TIP-CENTER also allows tooth radius compensation with all positioning blocks (e.g., with RL/RR)
- The control displays a warning when residual material is left behind due to the angle of the secondary cutting edges. You can suppress this warning with the machine parameter suppressResMatlWar (no. 201010).