With a facing slide, also called boring head, you can perform almost all turning operations with fewer different tools. The slide position of the facing slide in the X direction can be programmed. On the facing slide you mount, for example, a longitudinal turning tool that you call with a TOOL CALL block.
Application
Related topics
- Machining with parallel axes U, V and W
Requirements
- Combined milling/turning (software option 50)
- Control prepared by the machine manufacturer
- Kinematics with facing head activated
- Workpiece datum in the working plane is at the center of the rotationally symmetrical contour
The machine manufacturer must take the facing head into account in the kinematics.
Switching the operating mode with FUNCTION MODE
With a facing head, the workpiece datum must not be in the center of the rotary table, because the tool spindle rotates.
Description of function
Refer to your machine manual.
The machine manufacturer can provide his own cycles for working with a facing slide. The standard functional range is described below.
The facing head is defined as a turning tool.
Turning tool table toolturn.trn (option 50)
- Please note for tool calls:
- TOOL CALL block without tool axis
- Cutting speed and spindle speed with TURNDATA SPIN
- Switch the spindle on with M3 or M4
Machining also works with a tilted working plane and on workpieces that are not rotationally symmetric.
If you move with the facing head without the FACING HEAD POS function, you must program the motions of the facing head with the U axis, e.g. in the Manual operation application. If the FACING HEAD POS function is active, program the facing head with the X axis.
When you activate the facing head, the control automatically positions itself at the workpiece datum in X and Y. To avoid collisions, you can define a safe height using the HEIGHT syntax element.
The facing head is deactivated with the FUNCTION FACING HEAD function.
Input
Activating the facing head
NC programs contained in this User's Manual are suggestions for solutions. The NC programs or individual NC blocks must be adapted before being used on a machine.
- Change the following contents as needed:
- Tools
- Cutting parameters
- Feed rates
- Clearance height or safe position
- Machine-specific positions, e.g. with M91
- Paths of program calls
Some NC programs depend on the machine kinematics. Adapt these NC programs to your machine kinematics before the first test run.
In addition, test the NC programs using the simulation before the actual program run.
With a program test you determine whether the NC program can be used with the available software options, the active machine kinematics and the current machine configuration.
11 FACING HEAD POS HEIGHT+100 FMAX | ; Activate facing head and move with rapid traverse to safe height Z+100 |
The NC function includes the following syntax elements:
Syntax element | Meaning |
---|---|
FACING HEAD POS | Activate the syntax initiator for the facing head |
HEIGHT | Safe height in the tool axis Optional syntax element |
F or FMAX | Approach safe height with defined feed rate or rapid traverse Optional syntax element |
M | Additional function Optional syntax element |
Deactivating the facing head
NC programs contained in this User's Manual are suggestions for solutions. The NC programs or individual NC blocks must be adapted before being used on a machine.
- Change the following contents as needed:
- Tools
- Cutting parameters
- Feed rates
- Clearance height or safe position
- Machine-specific positions, e.g. with M91
- Paths of program calls
Some NC programs depend on the machine kinematics. Adapt these NC programs to your machine kinematics before the first test run.
In addition, test the NC programs using the simulation before the actual program run.
With a program test you determine whether the NC program can be used with the available software options, the active machine kinematics and the current machine configuration.
11 FUNCTION FACING HEAD OFF | ; Deactivate facing head |
The NC function includes the following syntax elements:
Syntax element | Meaning |
---|---|
FUNCTION FACING HEAD OFF | Deactivate the syntax initiator for the facing head |
Notes
- Position facing slide at home position with active FACING HEAD POS function
- Retract facing slide with active FACING HEAD POS function
- In Manual operation mode, move the facing slide with the U axis key
- Because the Tilt the working plane function is possible, pay attention to the 3D ROT status
- To set a spindle speed limitation you can use the NMAX value from the tool table as well as SMAX value from FUNCTION TURNDATA SPIN.
- The following constraints apply to the use of a facing slide:
- Miscellaneous functions M91 and M92 cannot be used
- Retraction with M140 is not possible
- TCPM or M128 are not possible (option 9)
- DCM collision monitoring cannot be used (option 40)
- Cycles 800, 801, and 880 cannot be used
- If you are using the facing slide in the tilted working plane, please note the following:
- The control calculates the tilted working plane as in milling mode. The COORD ROT and TABLE ROT functions, as well as SYM (SEQ), refer to the XY plane.
- HEIDENHAIN recommends using the TURN positioning behavior. The MOVE positioning behavior is not the best option in combination with the facing slide.