S.B.C. Elettronica S.p.A. - Engineering Division
HPDxxN – High Power User’s Manual
44
3.6.7 Spindle orientation
When this mode (12) is selected it becomes operational when b40.2=1. The motor reaches the
speed in Pr50 on the ramps in Pr52. It now spins at constant speed until it reaches the position set in
Pr54; at this point the position loop is closed.
PARAMETERS FOR OPERATING MODE 12
Pr50
Maximum speed during spindle orientation
. Unit=rpm, default=200, range=0..500.
This parameter makes it possible to limit maximum motor speed during spindle orientation.
Pr51
Reserved.
Pr52
Deceleration ramp
. Unit=s/krpm, default=500, range=2..30000, resolution=1 thousandth
of a second. When the spindle orientation command is set (b40.2=1) deceleration required
of the motor can be limited by this parameter so that a change of 1000 rpm takes Pr52
thousandths of a second.
Pr53
Reserved.
Pr54
Motor shaft position for spindle orientation
. Unit=steps, default=0, range=0..4095.
One revolution of the motor shaft corresponds to 4096 steps.
Pr56
Servo-error window
. Unit=steps, default=100. If the absolute position error is greater
than the value set in Pr56, b70.5 is set to 1.
Pr57
Position control loop proportional gain
. Default=100, range = 0..32000.
Pr58
Reserved.
Pr59
Reserved.
b70.5
Servo-error
. b70.5 is set to 1 if the absolute position error is greater than the value in
Pr56, otherwise it is set to zero.
3.7 Block diagrams
The main block diagram provides a graphic description of how to use the drive. Each rectangular
block represents one or more read/write parameters, each rhomboid shape represents read-only
parameters. In the diagram there are other functional blocks such as: greater than..., equal to, the
smallest among..., logical and/or; we have used standard symbols for all these blocks. Binary
parameters are shown as switches and the position depicted is the default value.