Siemens SINUMERIK 840D Simodrive 611 digital - Spindle Monitoring

6 Pro
g
rammin
g
the control
6
03/2006
6.9 Axes and spindles
6-125
© Siemens AG 2006 All Rights Reserved
SINUMERIK 840D/810D Start-Up Guide (IADC) – 03/2006 Edition
6.9.19 Spindle monitoring
If the velocity specified in MD 36060: STANDSTILL_VELO_TOL is undershot,
this is indicated via the “Axis/spindle” interface signal.
If MD 35510: SPIND_STOPPED_AT_IPO_START is set, the tool feed is
enabled.
If the spindle reaches the tolerance range specified in MD 35150:
SPIND_DES_VELO_TOL, then the “Spindle in setpoint range” signal is output.
If MD 35500: SPIND_ON_SPEED_AT_IPO_START is set, the tool feed is
enabled.
The maximum spindle speed is entered in MD 35100: SPIND_VELO_LIMIT.
The NCK limits the speed to this value. If, however, the speed is exceeded
by the speed tolerance in spite of the NCK limitation (drive fault), then the
IS “Speed limit exceeded” is output together with the alarm “22150 channel
[name] block [number] spindle [number] maximum chuck speed exceeded”.
MD 36200: AX_VELO_LIMIT also monitors the speed of the spindle. An alarm
is generated if the speed is exceeded. In position-controlled mode
(e.g. SPCON) a limitation is set within the control to 90% of the maximum speed
specified by the MD or setting data (control reserve).
The maximum speed of the gear step is entered in
MD 35130: GEAR_STEP_MAX_VELO_LIMIT and the minimum speed is
entered in MD 35140: GEAR_STEP_MIN_VELO_LIMIT. The speed cannot
leave this range when the appropriate gear step is engaged.
The functions G25 S... are used to set a minimum spindle speed and G26 S... to
set a maximum spindle speed limit via the program. The limitation is active in all
operating modes.
Function LIMS=... allows a spindle speed limit for G96 (constant cutting velocity)
to be specified. This limitation is operative only when G96 is active.
The maximum encoder limit frequency (MD 36300: ENC_FREQ_LIMIT) is moni-
tored. If this limit is exceeded, the synchronization is lost and the spindle func-
tionality reduced (thread, G95, G96). It is resynchronized automatically for the
position measuring systems that have become unsynchronized as soon as the
encoder frequency falls below the value in MD36302: ENC_FREQ_LI-
MIT_LOW. The encoder limit frequency value must be set such that the mecha-
nical encoder speed limit is not exceeded or else the synchronization from high
speeds will be incorrect.
Axis/spindle
stopped
Spindle in setpoint
range
Maximum spindle
speed
Minimum/
maximum gear
step speed
Programmable
spindle speed
limits
Maximum
encoder limit
frequency