Computer Drive Installation Instructions

12.93 12 Functional Descriptions

12.24 Travel to fixed stop

The "Travel to fixed stop" function is available as an option.

12.24.1 Corresponding data

• NC MD 1804* bit 3 Clamping tolerance monitoring active

bit 4 Sensor signal PLC for travel to fixed stop

bit 5 Axis can travel to fixed stop

• NC MD 1284* Clamping tolerance for travel to fixed stop

• NC MD 1280* Following error excess value threshold for travel to fixed stop

• NC MD 1144* Switchover current setpoint

• SD 320* Clamping torque for travel to fixed stop

• Travel to fixed stop option

• DB 32 DL x+2 bit 0 Acknowledgement for travel to fixed stop signal

• DB32 DL x+2 bit 1 Acknowledgement for travel to fixed stop reached signal

• DB 32 DL x+2 bit 2 Sensor signal for travel to fixed stop reached signal

• DB 32 DR x bit 6 Travel to fixed stop active

• DB 32 DR x bit 7 Fixed stop reached

Note:

The axis position can be monitored in the "Fixed stop reached" state by means of NC MD

1804* bit 3 "Clamping tolerance monitoring active" and NC MD 1284* "Clamping tolerance".

12.24.2 Functional description

The "Travel to fixed stop" function allows defined forces to be generated for the purpose of

clamping workpieces, tools, etc. The function can be used for both axes and spindles.

It can be selected and deselected via G commands G221/G220 or the command channel.

The fixed stop must be situated between the start and target positions of the axis/spindle when

the function is selected or deselected.

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SINUMERIK 840C (IA)