1Pcs Industrial Servo Motor Yaskawa NEW ORIGINAL 1.8KW Ac Servo Motor SGMGV-20A3A21

 

 

 

 

SGMGV-05ADA21

SGMGV-09ADA61

SGMGV-09ADC21

SGMGV-09ADC61

SGMGV-13ADA21

SGMGV-13ADA61

SGMGV-13ADA6C

SGMGV-1AADA61

SGMGV-20ADA21

SGMGV-20ADC61

SGMGV-30ADA21

SGMGV-30ADB6C

SGMGV-30ADC61

SGMGV-44ADA21

SGMGV-44ADA2C

Stepper motors can often exhibit a phenomena refered to as resonance at certain step rates. This can be seen as a sudden loss or drop in torque at certain speeds which can result in missed steps or loss of synchronism. It occurs when the input step pulse rate coincides with the natural oscillation frequency of the rotor. Often there is a resonance area around the 100 – 200 pps region and also one in the high step pulse rate region. The resonance phenomena of a stepper motor comes from its basic construction and therefore
it is not possible to eliminate it completely. It is also dependent upon the load conditions. It can be reduced
by driving the motor in half or microstepping modes.

 

 

When one step pulse is applied to a stepper motor the rotor behaves in a manner as defined by the above curve.
The step time t is the time it takes the motor shaft to rotate one step angle once the first step pulse is applied.
This step time is highly dependent on the ratio of torque to inertia (load) as well as the type of driver used.
Since the torque is a function of the displacement it follows that the acceleration will also be. Therefore, when moving in large step increments a high torque is developed and consequently a high acceleration. This can cause overshots and ringing as shown. The settling time T is the time it takes these oscillations or ringing to cease. In certain applications this phenomena can be undesirable. It is possible to reduce or eliminate this behaviour by microstepping the stepper motor. For more information on microstepping please consult the microstepping note.

 

 

 

This can be used for example if you want to control the pan and tilt of a camera or sensor connected to the servos. It is almost the same code like the above example with the addition of code to read the voltage on a potentiometer. This value is scaled so that the position of the pot (from 0 to 1023) is mapped to a
value between 0 and 180 degrees. The only difference in the wiring is the addition of the potentiometer; please see figure below for hardware connection