Normalisation of the velocity

Example 1:

The drive expects 10E-4 revolutions/minute at the velocity interface (SERCOS preferred scaling).

Example 2:

The drive expects mm/minute at the velocity interface.

Example 3:

The settings of SECOS parameters S-0-0044, S-0-0045 and S-0-0046 and an existing gear must be considered to determine the velocity scaling of a SERCOS spindle. As an example, the drive is to use the following scaling and the gear ratio is to be 1:1:

The velocity scaling S-0-0044 is therefore rotational referred to revolutions/minute. With a 1 increment in the velocity interface S-0-0040, the drive therefore rotates at a velocity of

when referred to 10^-3° this is

Possible values for the parameters P-AXIS-00205 and P-AXIS-00206 are therefore:

To consider a possible gear ratio, this must be entered in the axis parameters P-AXIS-00511 and P-AXIS-00512.

Example 4

With PROFIDRIVE drives, the speed scaling is stored in the controller as a reference speed.

The speed velocity specifies the speed of the motor shaft in revolutions per minute, provided the value 0x4000 000 is output in the process data item for speed (NSOLL_B).

With SINAMICS controllers, the reference speed is stored in parameter p2000, for example.

Example p2000 = 6000 [rpm]

6000 revolutions = 6000 * 360° * 1000 = 2160000000 * 10-3 °

0x40000000 = 1073741824 (speed increments)

This results in the following parameter settings: