Tool Parameter: Clearance Angle - Siemens SINUMERIK 808D Function Manual

Address (PLC → NCK)
DB3200.DBX14.4
You can simply modify PLC subroutine 37 (MCP_NCK) as follows in the default PLC program to realize desired contour
handwheel function:
Input signals
ConHw_Key
SimConHw_Key
NegDir-
SimConHw_Key
For example, if you desire to control the contour handwheel via the MCP key K7, you can set the address of signal
ConHw_Key to DB1000.DBX1.7 and the address of signal ConHw_LED to DB1100.DBX1.7.
After you edit the default PLC program as above and download it to the control system, you can use the contour handwheel
with a part program containing "FD=0".
Note
The contour handwheel function remains active as long as the MCP key defined for contour handwheel is activated. In this
case, FD=0 always applies. The programmed feedrate programmed applies only after the block containing "FD=0" runs out
and the contour handwheel key is deactivated.
The override is effective as for NC program execution.
Boundary conditions
● Requirements
Fixed feedrate, dryrun feedrate, thread cutting, or tapping must not be selected.
● Limit values
The acceleration and velocity of the axes are limited to the values defined in the machine data.
● Interruption of traversing movement
On a cycle stop, the function remains selected but the handwheel pulses are not summated and are ineffective.
Requirement: MD32084 $MA_HANDWH_STOP_COND bit 2 = 1
DRF
A selected DRF function also has a path-override action.
● Channel-specific deletion distance-to-go
This causes the movement triggered by the contour handwheel to be aborted; the axes are decelerated and the program
is restarted with the next NC block. The contour handwheel then becomes effective again.
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Tool parameter: clearance angle

Meaning
Certain turning cycles, in which traversing motions with tool clearance are generated, monitor the tool clearance angle of the
active tool for possible contour violations.
Value range
The angle (0 to 90° with no leading sign) is entered in this tool parameter as the tool clearance angle.
Function Manual
01/2017
Signal state
=1: negative direction for contour handwheel
simulation
=0: direction as programmed for contour
handwheel simulation
Description
Define the contour handwheel at
the MCP key
Define the simulation contour
handwheel at the MCP key
Define the negative direction for
simulation contour handwheel at
the MCP key
Corresponding to ... (NCK → PLC)
-
Output signals
ConHw_LED
SimConHw_LED
NegDir-
SimConHw_LED
Description
Define the contour handwheel at
the MCP LED
Define the simulation contour
handwheel at the MCP LED
Define the negative direction for
simulation contour handwheel at
the MCP LED
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