Siemens SINUMERIK 840C - Manual (Page 236)

09.95 6 NC Machine Data (NC MD), NC Setting Data (NC SD)
6.4 Axis-specific MD 1 (axial data 1)
Jog feedrate 288*
Default value Lower input limit Upper input limit Units
2 000 +0 99 999 000 1 000 units/min (IS)
Active on
NC Stop
The specified value applies to travel in JOG mode with the feedrate override switch set to
100%.
The value in NC MD 288* must not exceed the maximum feedrate (NC MD 280*).
Rapid traverse in jog mode 292*
Default value Lower input limit Upper input limit Units
5 000 +0 99 999 999 1 000 units/min (IS)
Active on
NC Stop
The specified value applies to travel in JOG mode with the rapid traverse override key
actuated and the rapid traverse override switch set to 100 %.
The value defined in NC MD 292* must not exceed the maximum speed (NC MD 280*).
The value in NC MD 292* is not used for programmed rapid traverse G00, which is defined by
the maximum speed entered in NC MD 280*.
Recommended value
The selected value should be slightly lower than rapid traverse rate G00 to make allowance for
the operator's response time.
Ref. point approach speed 296*
Default value Lower input limit Upper input limit Units
10 000 +0 99 999 999 1 000 units/min (IS)
Active on
NC Stop
If the Direction key leading to the reference point is depressed in "Reference point approach"
mode, the axis accelerates to the reference point approach speed. (Exception: The axis is
already at the deceleration cam or automatic reference point approach has been selected; also
refer to NC MD 244*).
The direction of reference point approach is specified in NC MD 564*.
The value entered in NC MD 296* must not exceed the maximum speed (NC MD 280*).
Also refer to Section entitled ”Axis (Analog) and Spindle Installation” for details on reference
point approach.
Incremental speed 300*
Default value Lower input limit Upper input limit Units
500 +0 99 999 999 1 000 units/min (IS)
Active on
NC Stop
The specified speed takes effect in incremental feed mode only (INC1 ... 10 000), and must
not exceed the maximum speed (NC MD 280*).
When traversing with the handwheel in modes INC1 ... 10 000 or with the DRF function, the
speed is determined exclusively by the handwheel.
© Siemens AG 1992 All Rights Reserved 6FC5197- AA50 6–51
SINUMERIK 840C (IA)