Siemens SINUMERIK 840DE sl Commissioning Manual page 169

Possible conclusions
● The speed histogram is an indication of the load on the bearings and rotary gland caused
by the speed.
● The speed histogram is an indication of the load on the bearings caused by the stock
removal forces. The relationship between torque and radial force changes depending on
the tool diameter (lever arm), the milling arc (superimposition of the cutting forces of the
individual cutting edges) and the cutting force coefficients (the stock removal force consists
of cutting force, feedrate force and passive force - only the cutting force is acquired via the
torque).
10.3.7 Clamping system
The diagnosis of the clamping system offers the following capabilities:
● Fast and robust detection of the clamping states.
● Monitoring of the clamping task and the clamping system.
● Sensors S1 and S4 in the spindle provide information about the clamping device.
● Sensor S5 detects a position, e.g. the defined rotatory angular position of the shaft.
Clamping states
The preset limits for the three clamping states are displayed in the upper section of the window.
The clamping state is defined for the specified voltage range of the analog output signal of
sensor S1.
The values in the "Voltage min." and "Voltage max." columns indicate in which voltage range
the analog signal of sensor S1 must lie for the corresponding clamping state.
The preset speed limitation "Speed max." specifies the maximum permissible speed for the
clamping state and is limited to this by the drive.
Signal overview
The current state values of the sensors, the tool clamping, the speed setpoint and the active
speed limitation are displayed in the signal overview
Signal
State
Piston free
Shaft in the
change posi‐
tion
Speed set‐
point
SINUMERIK Operate (IM9)
Commissioning Manual, 12/2017, 6FC5397-1DP40-6BA1
Sensor Description
S1 Clamping state
S4 Plunger sensing
S5 Position sensing
Specification of the
speed
Value Meaning
3 Released
7 or 8 Clamped with tool
10 Clamped without tool
Yes Release plunger not in contact with the
shaft.
No Release plunger in contact with the shaft.
Yes E.g. shaft is at a defined rotary angular
position.
No E.g. shaft is not at a defined rotary angu‐
lar position.
Speed specification by the user.
Spindle functions
10.3 Spindle diagnostics
155