Geometry Monitoring - Siemens SINUMERIK 840D sl Function Manual

Extended functions

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Geometry monitoring

The following quantities can be monitored:

● The current grinding wheel radius

● The current grinding wheel width

The current wheel radius is compared with the value stored in parameter $TC_TPG3.

The current radius is compared with the parameter number of the first edge (D1) of a

grinding tool declared in parameter $TC_TPG9.

The current wheel width is generally calculated by the dressing cycle and can be entered in

parameter $TC_TPG5 of a grinding tool. The value entered in this parameter is compared to

the value stored in parameter $TC_TPG4 when the monitoring function is active.

When does monitoring take place?

The monitoring function for the grinding wheel radius remains active when an online tool

offset is selected:

● when the monitoring function is activated

● when the current radius (online tool offset, wear parameter) or the current width

Monitor reactions

If the current grinding wheel radius becomes smaller than the value stored in parameter

$TC_TPG3 or the current grinding wheel width ($TC_TPG5) drops below the value defined

in $TC_TPG4, the axis/spindle-specific bit DBX83.3 is set to "1" in DB31, ... at the PLC

This bit is otherwise set to "0".

DB31, ... DBX83.3 = 1 ⇒ Geometry monitoring has responded

DB31, ... DBX83.3 = 0 ⇒ Geometry monitoring has not responded

No error reaction is initiated internally in the control system.

Extended Functions

Function Manual, 01/2008, 6FC5397-1BP10-3BA0

($TC_TPG5) is altered

Grinding-specific tool offset and tool monitoring (W4)

18.5 Grinding-specific tool monitoring

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Sinumerik 840de sl