Siemens SINUMERIK 828D Function Manual page 270

D1: Diagnostics tools
5.3 Service overview
This information is used for:
• Checking the setpoint branch
(e.g. position setpoint, speed setpoint, spindle speed setpoint prog.)
• Checking the actual value branch
(e.g. position actual value, measuring system 1/2, actual speed)
• Optimizing the position control loop
(e.g. following error, system deviation, servo gain factor)
• Checking the complete control loop of the axis
(e.g. by comparing the position setpoint and position actual position value, speed setpoint and actual speed)
• Checking for hardware faults
(e.g. checking the encoder: If the axis is mechanically moved, then the position actual value must change)
• setting and checking axis monitoring functions.
Following error
Error signal
Contour deviation
Servo gain factor (calculated)
Active meas. system
Position actual value measuring
system 1/2
270
The difference between the position setpoint and position actual
position value of active measuring system 1 or 2.
Unit: mm, inch or degrees
The difference between the position setpoint at the position
controller input and the actual position value of active measuring
system 1 or 2.
Unit: mm, inch or degrees
The actual contour deviation is displayed with this value (variations
of the following error caused by equalization operations on the
speed controller due to load changes).
The contour deviation results from the difference between an
actual position pre-calculated from the position setpoint and the
actual position value of active measuring system 1 or 2.
Unit: mm, inch or degrees
The servo gain factor in the display is calculated by the NC
according to the following equation:
Velocity setpoint = setpoint currently being output to the axis/
spindle.
References:
Function Manual Basic Functions; Velocities, Setpoint/Actual Value
Systems, Closed-Loop Control (G2)
Here, it is displayed whether measuring system 1 or 2 is active.
The actual position of the axis as measured via measuring system
1/2. The position is displayed in the machine coordinate system (no
work offsets or tool offsets included).
Unit: mm, inch or degrees
Function Manual, 09/2011, 6FC5397-0BP40-2BA0
Basic Functions