Start-Stop Frequency; Rate Of Frequency Increase - Siemens SIMATIC S5 Manual

MD
M
ML
Fig. 2/1 O Torque characteristic curve of a stepper motor
The torque characteristic curve is specified by the stepper motor manufacturer for full and half
step operation. frn~ should be determined with the appropriate curve. You should allow for suffi-
cient reserve.

Start-Stop Frequency

2.5.3.6
The start-stop frequency is the frequency to which the motor can jump under load without disen-
gaging and stopping.
The start-stop frequency f~~ is entered in the torque characteristic curve for the unloaded motor.
The value of f~~ depends on the inertia of the load. The simplest way of determining this is by
trial and error.

Rate of Frequency Increase

2.5.3.7
Machine Data and their Structure
f
2 - 1 5