Festo Контроллер двигателя SEC-ST - Manual (Page 16)

Contents and general instructions
XIV
Festo SEC−ST−48−6−P01−EN en 0606c
Procedure for correctly adjusting the stepping motor
Determining the possible speed with known load
If the torque of the load on the drive is known, the possible
speed can be determined from the speed−torque characteriĆ
stic curve.
The highest usable speed is the one where the resulting torĆ
que is about 80% of the maximum torque. Beyond that, the
motor’s loss of torque is so great that the danger of losing
steps increases.
Resonance Increased incidence of resonance can be expected in full−step
operation. Since this always depends on the system, it cannot
always be precisely determined where resonance will occur.
Here it is necessary to test.
In general, it is advantageous to run at half−step to reduce
resonance. Current should be reduced when the motor is run
without load. Current that is set too high can also cause resĆ
onance and thus a loss of step.