Detailed Description
2.1 Spindle modes
Basic logic functions: Spindles (S1)
10 Function Manual, 11/2006, 6FC5397-0BP10-2BA0
Preconditions
• The spindle need not be synchronized.
• No spindle position actual-value sensor required for M3/M4/M5 in connection with:
– Inverse-time feedrate coding (G93)
– Feedrate in mm/min or inch/min (G94)
– Tapping with compensating chuck (G63)
• 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.
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