wwwsex国产精品,日韩女人性开放视频,色偷偷人人澡人人爽人人模,美丽新世界漫画,亚洲一区二区情侣,国内永久免费crm,国产国产人免费人成免费视频,亚洲老妈激情一区二区三区,被夫の上司に犯波多野结衣,范冰冰对决黑金刚,午夜欧美日韩精品久久久久久

In theory, the actual application can be divided into two cases, time-sharing and synchronous work.

Two or more than two Plextor stepper motor work time, the need to share a stepper motor drive, power stepping drive and choice of driver can correspond to a stepper motor to position, two stepper motor respectively through the relay to switch action.

However, there are two disadvantages in this scheme, one is the loss of precision. In the process of relay switching, the phase of the stepper motor will be lost, especially the repeated switching, which will lead to cumulative errors. Furthermore, the switch is in the enable state and may lose position on the device. Another drawback is that it is vulnerable to damage if the relay is damaged or program error may result in damage to the stepper motor driver or even to the power supply.

Two or more than two stepper motor work, need to share a drive, the maximum output current first step motor drive stepper motor is greater than the sum of the rated current. Second, because the stepper motor synchronous start and stop when the reverse electromotive force is higher, will cause some impact on the drive, resulting in this application state of the drive to shorten the service life.

So the reasonable scheme is a stepper motor corresponding to a stepper drive.