Maximum Encoder Limit Frequency - Siemens SINUMERIK 840D Function Manual

S1: Spindles
18.8 Spindle monitoring
Note
Rotary axis / spindle
If a spindle is also temporarily operated as a rotary axis, alarm 22100 "Chuck speed exceeded"
is displayed if:
"Actual speed of the rotary axis" > MD35100 $MA_SPIND_VELO_LIMIT
(maximum spindle speed) +
MD35150 $MA_SPIND_DES_VELO_TOL (spindle speed tolerance value)
Remedy: Adjust the maximum spindle speed to the maximum rotary axis speed during rotary
operation:
MD35100 $MA_SPIND_VELO_LIMIT = MD32000 $MA_MAX_AX_VELO (maximum
speed of the rotary axis)
For the change to take effect a reset must be triggered.
Maximum spindle speed: Configurable process-dependent limit value
The maximum process-related spindle speed is configured through the following setting data:
SD43235 $SA_SPIND_USER_VELO_LIMIT (maximum spindle speed)
Changes can be made by writing the setting data through:
● Programming in an NC program
● Manually through the user interface by the machine operator
Changes become effective immediately.
Limitation of the speed setpoint
Where appropriate, the controller limits programmed spindle speed setpoints to the values
specified in the setting data. The limitation is then displayed through the following system
variables:
$AC_SMAXVELO_INFO[<Spindle number>] == 21
18.8.7

Maximum encoder limit frequency

Limit violation
The maximum encoder frequency limit of the actual spindle position encoder is monitored by
the control (the limit can be exceeded). It is the responsibility of the machine tool manufacturer
to ensure that the configuration of the spindle motor, gearbox, measuring gearbox, encoder
and machine data prevents the maximum speed of the actual spindle position encoder being
exceeded.
832
CAUTION
Axes and spindles
Function Manual, 06/2019, A5E47437747B AA