Repair And Exchange Of Servo Amplifier In Industrial Electronics

It is essential to include the exchange programs when deciding about the right company to select for repairing industrial electronics or servo motors. This is because these companies that is on the exchange program send a motor that works to help the customer to continue their normal life activities using this replacement till they repair the part. It is possible to continue working till the repaired unit is returned.

Factor in this consideration regarding the exchange program when you decide about the best service company for industrial repairs. You can continue to work without interruptions at the facility where you work as well as benefit with great savings. You will only be paying a fraction of the cost when you repair and use remanufactured parts instead of brand new motors.

It is not necessary to wait when the repairs are being carried out when one is using the exchange process. The remanufactured spare part is used to replace the malfunctioning part and help continue to run the facility smoothly. It is not necessary to maintain a huge inventory of various machine parts in case one of them does not function properly.

The advantage is that your facility continues to function with the backing of the industrial repair company. These types of servo motor exchange and repair companies enable people to avoid incurring huge costs for maintaining inventories by providing equipment from their inventory. They prefer to collaborate with companies that use the exchange facility for repair as well as delivery. Given below are some methods used by industrial repair companies in the exchange process

·         The website of the company can be visited and the exchange form filled

·         The full price for the remanufactured unit should be paid upfront

·         Downtime is eliminated as the item is quickly shipped

·         The malfunctioning motor is quickly returned to the repair company after boxing it up when the remanufactured item is received for efficient motion control

·         Once this item having malfunctions are received, the customer credit for the item is issued by the company

Make sure you collaborate with a company that offers and deals with equipment such as spindle, servo motor, servo amplifier, VFD drive, monitor, spindle amplifier, power supply and so on. This equipment should also work with electronic manufacturers such as Indramat, Allen Bradley, Yaskawa, Siemens, Fanuc and Xycom. These companies also serve as a one stop solution for every requirement and you can avoid running to different repair services every time you run into a problem.

What Is Motion Control?

Motion control is sub field of automation. This controls the position or the velocity of the machinery. To do this it uses device like a linear actuator, electric motor, hydraulic pump or generally a servo motor.  This is a very important part of robotics and CNC machine tools. This is a very complex system as the kinematics in these machines is usually very simple. Motion control is used greatly in packaging, textile, semi conductor, printing and assembly lines.

The basic design of the motion control is as follows. The control is set to generate set points for the desired outcome and to close positions or velocity (the feedback loop). The signal is then changed into an electrical current by a drive or an amplifier. This is then delivered to the actuator. (An actuator is for motion output and can be a hydraulic pump, electric motor or a linear actuator.)  Some newer models are more accurate because they can close the position internally. 

Feedback sensors such as Hall Effect devices or optical encoders are used to close the position of the actuator bring it back to the motion control. The mechanical components then change the motion into a required movement. This can include shifting, belts, ball screw, gears, and linkages linear or rotational bearings. When co-ordinated motion is required the interface between the motion controllers are critical. They have to provide tight synchronisation.

There are some common control features and these include position control (this is often based on the velocity profiles for example S-curve or triangular profile.), velocity, electronic gearing (also known as cam profiling) this is where the master axis and the position of the slave axis are mathematically linked. For example, when two rotating drums turn at a set ratio to one another, there is also electronic camming and this is where the slave axis abides by a profile that is the job of the master as this does not need to be salted but it has to be animated. There is also pressure and force control.

Motion controllers are used in an array of different industries to help produce and make most of the things we use every day. They help do the jobs that are hard labour for humans and assist in increasing productivity.  There are several companies that globally sell these controls. They develop, manufacture and market servo drives and systems. Their products are predominantly brushless controls; however they do provide drives for alternate motor types. They also provide standard products and can customize to suit your needs.

How BLDC Motors Work

Before using BLDC motors, understand its mechanism.

You will be able to find BLDC motors or brushless DC motors in industrial equipment, appliances and medical instruments as they provide various advantages as compared to others like it.

However, before usingthese motors particularly for blade pitch control, you must first have a complete understanding of its mechanism which consequently results to a fast review of the construction of a DC motor.

A BLDC motor is particular type of servo motors which basically relies on wire coils on rotors and frames of rigid motors which on the other hand places permanent magnets all over the rotor.

Electric current passing through the windings make some magnetic field which either repels it from the magnet or attracts a winding to the magnet. Brushes placed on stators and contacts placed on rotors choose various windings as power while the rotors turn.

In BLDC motors, the coils make up the motors’ outsides and the rotors provide permanent magnets. Once again, the repulsions and attractions of the coils and the permanent magnets make the rotors spin. However, in BLDC motors, commutations do no occur on spinning shafts.

Even though these motors are more expensive than other brush-DC motors, they provide benefits. Their exterior coils dissipate heat better than those on rotors. BLDC motors do not have commutators or brushes to tire out or need maintenance regularly, thus they can function unattended for a very long period of time. Lastly, these motors don’t produce electromagnetic interference or EMI from machine-driven commutators.

Rather than utilizing mechanical commutators, servo motors like BLDC use automated commutation in switching the coils to on or to off. This kind of commutation is classified into two – the sensorless or the sensor-based.

The sensor-based motors, Hall-effect sensors are placed inside the coils of the motor to sense the position of the permanent magnets of the rotors. Microcontrollers or MCU read the states of the sensors and utilize a particular algorithm to know which of the coils to power as well as when.

On the other hand, sensorless motors require MCUs to measure the back electromotive force orr EMF produced across coils by spinning rotors’ magnets. The back EMF or BEMF defines the magnets’ positions.

However, the sensorless method is faced with a challenge because controller as well should power coils consequently to make the motors turn. Thus, how can one separate pulse-width signals of modulation which drive coils BEMF signals?

The answer is quite simple. Program MCUs to filter high-frequency PWM signals out as well as measure BEMF near the time when PWM signals pass through zero Voltage. The BEMF depends on various factors like coil resistance, number of coil windings, rotor magnets strengths and many others.