4.15
Gearing and transmission ratios for linear and rotational axes
IDN used
Meaning
IDN 76
scaling of the position data
IDN 121
Gearing input revolutions
IDN 122
Gearing output revolutions
With IDN 121 and 122 a gearing factor for simulating an electron gearing. IDN 76 Bit 6
then defines whether the setpoint relates to the motor or the load. The gearing manipula-
tes the setpoint according to the gearing factor.
Does not work with modulo.
The travel is limited via software limit switches, since overrun can occur.
Example:
IDN 121 = 1
IDN 122 = 2
Transmission ratio 2:1 (IDN122 / IDN121)
IDN 76 Bit 6 = 0
Gearing factor 1:2 with interpretation of the setpoint from the motor to the load.
With a setpoint of 1 revolution, the motor shaft turns 2 revolutions. The sercos
®
actual
position value sent back is for just 1 revolution of the motor.
IDN 76 Bit 6 = 1
Gearing factor 1:2 with interpretation of the setpoint from the load to the motor.
With a setpoint of 2 revolutions, the motor shaft turns 1 revolution.
The sercos
®
actual position value sent back is for 2 revolutions of the load.
sercos
®
for S300/S700
123
Kollmorgen
04/2016
Appendix
Position setpoint
Position act. value
Movement
Position setpoint
Position act. value
Movement
