Learning Center - Tech Notes

         A standard recondition is when a servo motor isn’t critically damaged and still in use, but has wear and tear that needs to be corrected before catastrophic damage occurs. We come to this conclusion after all testing is completed and the motor is electrically and mechanically good: Megger test, Surge test, Back EMF (electro...

    There are key issues with "CRT Monitors" that are making them a thing of the past, such as screen burn in, flyback failure, and failure of key components due to heat. Also due to the age of the technology it is becoming harder to find replacement parts.

   ...

What is a CRT Monitor?

A CRT monitor, or Cathode Ray Tube, is a glass vacuum tube screen containing a charged cathode, which projects three electron guns: one each for red, green, and blue phosphor dots. When electricity is applied to them, these electron guns shoot rays onto a fluorescent screen, creating images. These images can either be oscilloscope waveforms...

If your machine is equipped with Fanuc Automation components, and your CNC machine suddenly stops working, you probably check the status display on your Fanuc servo amplifier to see what number is displayed.

These numbers are error, fault...

Controllers and drives are two separate servo system components. With many different original servo equipment manufacturers, you can easily decipher a drive from a controller, such as with Fanuc and Indramat drives and controllers. However, Allen Bradley is an exception when defining controllers and drives...

Many terms exist for seemingly similar pieces of servo system equipment: Operator interface, HMI, CRT Monitor, Industrial Computer. So, what do the different terms mean, and which servo component terms have similar or different meanings?

Operator Interface



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Can you run a servo motor with a VFD?  First, lets look at how a servo amplifier works with a servo motor.

A servo amplifier actually fires DC voltage into the three phases of a servo motor.  Each time a phase is fired, it is completely dependent upon rotor positioning reference to the stator windings to be fired.  In other words...

Believe it or not, fans and an oven are two of the most crucial parts about Fanuc Power Supply repair.  Why, you ask?  Read on.

Fans Cool Down the Heat Produced by a Power Supply

The most common repair on Fanuc power supplies is the replacement of the fans.  If the fans aren’t working...

Siemens servo motors are most commonly used in the Automotive and in the Aerospace industries.  The reason for this is that these products are highly reliable and need minimal repairs.  In high stakes applications, these motors can generally perform well without issue.

But sometimes, as with all mechanical items, repairs are required.



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We specialize in quite a few brands at Repair Zone, but Indramat is one of our favorites.  Indramat Servo Motor Repair is also one of our favorite services!  Read below for some facts and figures on how Repair Zone stacks up in this area.

1. Experience counts. At Repair Zone, we have repaired over 1,500 Indramat servo motors.
    <...

Here, our technician, Will, talks about repair of an Allen Bradley 1391B-AA45 Servo Drive.  He’s one of Repair Zone Man’s faithful sidekicks.

Q: Tell us your name and what we’re talking about today.

A: Hello, I am Will...

A power supply takes AC voltage and converts it to DC voltage to power the servo drive that turns the servo motor in a servo loop. Power supplies require maintenance like any servo electronics, such as a Fanuc power supply.  



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When your Fanuc Servo Motor is ready for repair or replacement, a quick look at the nameplate usually yields its model number. Therefore, it also gives you marching orders to find what you need to get back up and running.
 


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Indramat was purchased by RexRoth, which was then purchased by Bosch. Your servo motor, depending on when it was made, may have a different manufacturer name on it. But if you have a servo motor with Indramat and MHD in the nameplate, you have got an Indramat MHD Series AC Servo Motor on your hands.
 


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If you have an Allen Bradley 1326AB Series Servo Motor, you have a dependable, high performance AC servo motor that works in a variety of applications.
 
But what do the figures that make up the Allen Bradley servo motor model number mean? We asked our technical team to help us break it down for you.
 


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CRT monitors are fast becoming a thing of the past.  Many monitors from manufacturers such as Allen Bradley, Modicon, Total Control, Fanuc and Nematron are cumbersome, antiquated, and can easily develop screen burn-in.   It has also become nearly impossible to find tubes for replacement in CRT Monitors.

In addition, and perhaps more importantly...

There are three main classifications of servo motors. They come in many sizes by many different manufacturers, but their base functions and structures are similar. Learn more about the three main types below.

AC Servo Motors

An alternating current servo motor (AC servo motor)...

             When a servo motor comes in for repair, one of the most important tests  is the surge test, which tests the windings to make sure there is not a break or short  in it. 
           A surge test is<...

What is a Servo Driver?

Servo Drivers are electronic amplifiers used to power servo motors. The driver is a closed-loop tracking system which is used for mechanical movement. They monitor the feedback signals from a servo motor and continually adjust for deviations in speed, position, and torque from its expected behavior.

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     A servo motor is a type of motor that can give us positional control by rotating a part and taking feedback from the encoder. A servo motor has a feedback device, which can be used to detect unwanted motion and make it much more accurate than a standard AC or DC motor. The feedback signal is constantly monitored by a servo drive...