Siemens SINUMERIK 828D Function Manual page 1273

S1: Spindles
16.2 Operating modes
Phase 2
Case 1: Spindle not synchronized
When the spindle is synchronized, position control is activated.
The spindle rotates at the maximum speed stored in machine data:
MD35300 $MA_SPIND_POSCTRL_VELO
until the braking start point calculation identifies the point at which the programmed spindle position can be
approached accurately with the defined acceleration.
Case 2: Spindle synchronized
To reach the end point, the spindle is accelerated up to the speed defined in machine data:
MD35300 $MA_SPIND_POSCTRL_VELO.
This is not exceeded.
The braking start point calculation identifies when the programmed spindle position can be approached
accurately at the acceleration defined in machine data:
MD35210 $MA_GEAR_STEP_POSCTRL_ACCEL.
At the point, which is determined by the braking start point calculation in Phase 1, the spindle decelerates to a
standstill with the acceleration given in the following machine data:
MD35210 $MA_GEAR_STEP_POSCTRL_ACCEL
Phase 3
At the point, which is determined by the braking start point calculation in Phase 2, the spindle decelerates to a
standstill with the acceleration given in the following machine data:
MD35210 $MA_GEAR_STEP_POSCTRL_ACCEL
Phase 3a:
When the SPOS command is activated the proximity of the end point is such that the spindle can no longer be
accelerated up to machine data:
MD35300 $MA_SPIND_POSCTRL_VELO.
The spindle is braked to a standstill with the acceleration given in the following machine data:
MD35210 $MA_GEAR_STEP_POSCTRL_ACCEL
Basic Functions
1273
Function Manual, 09/2011, 6FC5397-0BP40-2BA0