Axis/Spindle Stationary; Spindle In Setpoint Range - Siemens SINUMERIK 840D Function Manual

18.8.2

Axis/spindle stationary

Functions such as tool change, open machine doors, path feedrate enable, etc. are only
possible at the machine when the spindle is stationary.
Function
The "axis/spindle stationary" state is reached if a setpoint is no longer generated and the
spindle actual speed falls below the configured threshold value for "axis/spindle stationary":
MD36060 $MA_STANDSTILL_VELO_TOL (max. velocity/speed for "axis/spindle stationary")
If the spindle has come to a standstill, the following NC/PLC interface signal is set:
DB31, ... DBX61.4 (axis/spindle stationary)
Effectiveness
Monitoring for spindle stop is effective in all spindle modes and in axis mode.
Deactivate path feed
If a spindle is stopped in the open-loop control mode (M5), then path feed is deactivated if the
following machine data is set:
MD35510 $MA_SPIND_STOPPED_AT_IPO_START (feedrate enable for spindle stopped)
The path feed is re-enabled if the spindle comes to a standstill.
18.8.3

Spindle in setpoint range

Function
"Spindle in setpoint range" spindle monitoring checks whether:
● The programmed spindle speed is reached.
● The spindle is at a standstill:
DB31, ... DBX61.4 (axis/spindle stationary) = 1
● The spindle is still in the acceleration or deceleration phase.
In the spindle mode, open-loop control mode, the setpoint speed is compared with the actual
speed. If the actual speed deviates by more than the spindle tolerance that can be entered via
MD (refer below) then:
● The following axial NC/PLC interface signal is set to "0":
DB31, ... DBX83.5 (spindle in setpoint range) = 0
● The next machining block is not enabled (depending on the setting in
MD35500 $MA_SPIND_ON_SPEED_AT_IPO_START, see "Axis/spindle stationary
(Page 827)").
Axes and spindles
Function Manual, 06/2019, A5E47437747B AA
S1: Spindles
18.8 Spindle monitoring
827