Analog Speed Command Interface; Introduction; Possible Causes Of Error - HEIDENHAIN iTNC 530 Service Manual

20.2 Analog Speed Command Interface

20.2.1 Introduction

For the operation of analog axes and spindles, the position controller is located in the MC, the
speed and current controller in the servo amplifier.
The "result" of the position control is transferred to the analog servo amplifier via the ± 10 V
speed command interface.
For analog drives DC motors are often used.
Following analog speed command outputs are located on the MC 42x (B/C):
Analog speed value
outputs
On each of these D-Sub connectors there are several analog channels.
MP 100 is read from the right to the left and contains the information which axis is the first, the
Assignment of the
second, the third axis, etc.
speed value
outputs

20.2.2 Possible causes of error

20 – 344
X8
X9
Caution
MP 100 must not be changed!
Assignment of the speed command outputs
in the machine parameters
Machine parameters
Mechanical defects
Wear and tear of mechanical parts
Aging of the machine
Motor (carbon brushes, tachometer brushes, winding, etc.) defective
Servo amplifier defective
Defective cables
Poor shielding and grounding
Errors in the NC or PLC software
Defective nominal speed value interface of the MC (X8, X9)
Note
There is a large variety of possible error causes.
Profound knowledge of the machine and the interaction of the components is very helpful
especially for this type of errors.
When error messages are generated, press the HELP key. You will obtain information on
possible error causes and tips for error elimination.
Axes Spindles
MP 120.x MP 121.x
HEIDENHAIN Service Manual iTNC 530