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Showing posts from October, 2019

Control Methods For Stepper Motors

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In stepper motor systems, if the available motor torque is not adequate to overcome the load, the motor will stall or skip over one or more pulses, creating a difference between the desired position and the actual position reached. To avoid this, stepper motors are often oversized to ensure there’s a large margin between the worst-case load torque and the motor’s available torque. But there is an alternative to oversizing the motor. By adding an encoder and operating in closed-loop mode, stepper motor systems can achieve position monitoring and control much like servo motors.   The most straightforward way to operate a stepper motor in closed-loop mode is to compare the theoretical position which should have been reached based on the number of steps, with the actual position reached based on the encoder feedback. If there is a difference between the target and actual positions, the controller initiates a correction move. While the above method is reactive, correcting the

Things to keep in mind about dental handpiece care

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Properly functioning handpieces are crucial to maintaining a pleasant, efficient dental practice. Unfortunately, insufficient maintenance is a leading cause of the premature failure of these devices. Keep this list in mind each time you clean and lubricate your coxo dental handpieces to ensure that they operate at top performance and last longer. Proper pressure Remember to follow the manufacturer’s instructions regarding air pressure specifications, found in the manual. Higher air pressure does not mean higher performance. Paying attention to the manufacturer’s specifications could avoid serious damage to the turbine, regardless of whether you are working with a highor low-speed device. Keep wipe-downs simple. Remember to wipe your handpiece down with warm water, or warm water with a mild detergent, prior to lubrication and sterilization. Using strong chemicals to do this is usually unnecessary, and may even cause problems with chemical interactions during steriliz

Diagnosis and treatment of root canal therapy

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The first step within the procedure is to require associate in nursing X-ray via portable dentalx ray unit to check the form of foundation canals and verify if there area unit and signs of infections in very close bone. your dental partitioner and dentist can then use anesthesia to numb the world close to the tooth physiological state might not be necessary, since the nerve is dead , however most dentist still put to sleep the world to form the patient additional relaxed and comfortable. Next to stay the world dry and freed from secretions throughout treatment, your dental practitioner can place rubber dam round the tooth. An access the hole can then be trained into the tooth.the pulp along side bacterium, the decayed nervous tissue and connected scrap is far from the tooth.The cleanup out method is accomplished victimization passageway files.A series of those files accelerating diameter area unit every later placed into the access hole and worked down the complete length