Detailed Description
2.1 Spindle modes
Spindles (S1)
2-4 Function Manual, 08/2005 Edition, 6FC5397-0BP10-0BA0
• A spindle position actual-value sensor is an essential requirement for M3/M4/M5 in
connection with:
– Revolutional feedrate (G95)
– Constant cutting rate (G96, G961, G97, G971)
– Thread cutting (G33, G34, G35)
– Tapping (G331, G332)
– Activate position control (SPCON, M70)
Position control ON/OFF
The spindle can be operated with or without position control:
SPCON
(Position control ON)
SPCOF
(Position control OFF)
Speed control mode
Speed control mode is particularly suitable if a constant spindle speed is required, but the
position of the spindle is not important (e.g., constant milling speed for even appearance of
the workpiece surface).
• Speed control mode is activated in the part program with M3, M4, M5 or with SPCOF.
• NC/PLC IS:
DB31, ... DBX84.7 (open-loop control mode)
is set.
• NC/PLC IS:
DB31, ... DBX61.5 (Position controller active)
is reset if position control is not used.
• Acceleration in speed control mode is defined independent of the gear step in machine
data:
MD35200 $MA_GEAR_STEP_SPEEDCTRL_ACCEL
and should, whenever possible, correspond to the physical properties.
DB31, ... DBX61.5 (position controller active)
Position control is particularly suitable if the position of the spindle needs to be tracked over
a longer period or if synchronous spindle setpoint value linkage is to be activated.
• Position control mode is activated in the part program with SPCON (spindle number).
• NC/PLC IS:
DB31, ... DBX61.5 (position controller active)
is set.
• Acceleration in position control mode is defined independent of the gear step in machine
data:
MD35210 $MA_GEAR_STEP_POSCTRL_ACCEL.
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