Siemens sinumerik 840D sl Function Manual page 508

Table of contents
1 Brief description ......................................................................................................................................... 5
2 Detailed description ................................................................................................................................... 7
2.1 Function description.......................................................................................................................7
2.2 Clearance control.........................................................................................................................10
2.2.1 Control dynamics .........................................................................................................................10
2.2.2 Velocity feedforward control.........................................................................................................12
2.2.3 Control loop structure...................................................................................................................14
2.2.4 Compensation vector ...................................................................................................................15
2.3 Technological features of clearance control ................................................................................18
2.4 Sensor collision monitoring ..........................................................................................................19
2.5 Startup..........................................................................................................................................20
2.5.1 Activating the technological function............................................................................................20
2.5.2 Configuring the memory...............................................................................................................20
2.5.3 Parameter settings for input signals (840D) ................................................................................21
2.5.4 Parameter settings for input signals (840Di)................................................................................22
2.5.5 Parameters of the programmable compensation vector..............................................................23
2.5.6 Parameter settings for clearance control .....................................................................................24
2.5.7 Starting up clearance control .......................................................................................................26
2.6 Programming................................................................................................................................28
2.6.1 Activating and deactivating clearance control (CLC) ...................................................................28
2.6.2 Closed-loop control gain (CLC_GAIN).........................................................................................34
2.6.3 Limiting the control range (CLC_LIM) ..........................................................................................36
2.6.4 Direction-dependent traversing motion disable ...........................................................................37
2.6.5 Voltage offset, can be set on a block-specific basis (CLC_VOFF) ..............................................39
2.6.6 Voltage offset definable by synchronized action..........................................................................40
2.6.7 Selection of the active sensor characteristic (CLC_SEL) ............................................................41
2.7 Function-specific display data......................................................................................................42
2.7.1 Channel-specific GUD variables ..................................................................................................42
2.7.2 OPI variable .................................................................................................................................44
2.8 Function-specific alarm texts .......................................................................................................45
3 Boundary conditions ................................................................................................................................ 47
3.1 I/O modules..................................................................................................................................47
3.1.1 I/O modules (840D)......................................................................................................................47
3.1.2 I/O modules (840Di).....................................................................................................................48
3.1.3 External smoothing filters.............................................................................................................49
3.2 Function-specific boundary conditions.........................................................................................49
4 Examples................................................................................................................................................. 53
Special functions: Clearance Control (TE1)
Function Manual, 11/2006, 6FC5397-2BP10-2BA0
3