Feedrate Control and Spindle Motion
7.3 Position-controlled spindle operation (SPCON, SPCOF)
Fundamentals
Programming Manual, 11/2006, 6FC5398-1BP10-2BA0
281
7.3 Position-controlled spindle operation (SPCON, SPCOF)
Function
In some cases, position-controlled operation of the spindle may be advisable, e.g., in
conjunction with large-pitch thread cutting with G33, higher quality can be achieved.
Note
The command requires up to three interpolation cycles.
Programming
SPCON or SPCON(n) Activate position control
or
SPCOF or SPCOF(n) Deactivate position control, switch to speed control
or
SPCON(n, m, 0) Activate position control for multiple spindles in a block
or
SPCOF(n, m, 0) Deactivate position control for multiple spindles in a block
Parameter
SPCON
SPCON(n)
Switch master spindle or spindle number n from speed control to
position control
SPCOF
SPCOF(n)
Switch master spindle or spindle number n back from position control to
speed control
SPCON
SPCON(n, m, 0)
Several spindles with number n can be switched from speed control to
position control in one block
SPCOF
SPCOF(n, m, 0)
Several spindles with number n can be switched back from position
control to speed control in one block
n
m
Integers from 1 ... n of spindle number
Integers from 1 ... m of master spindle
Note
SPCON has modal action and remains valid until SPCOF.
The speed is specified with S... M3, M4 and M5 apply in respect of the directions of rotation
and spindle stop.
With synchronized spindle setpoint value linkage, the master spindle must be operated in
position-control mode.
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