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Browse all posts from DO Supply, a global automation parts reseller focused on hard-to-find and obsolete industrial automation products.

Drives & Motors

January 28, 2017

What is the Difference Between VFD and Servo Drives?

Servo systems are now well-known for their use in CNC machining, robotics, and factory automation. The servo technology is further expanded with the manufacturing of servo drives, used for powering electric servomechanisms. Despite being an excellent option for industry use, we also have these VFDs (Variable-Frequency Drives) which tend to be used a lot as an alternative for servo drives, given their energy-saving potential. Since both of these are widely used in industry and manufacturing processes, it’s important to point out some of the differences between them and in which situations is one better than the other. To do that, we’ll first need to see what are VFDs and servo drives and then compare the crucial differences. A servo drive is an integral part of a servo system that consists of a motor, a controller, a feedback device, and of course – a servo drive. Simply put, a servo drive is a part of the servo system that receives a particular command from a control system, amplifies...

Maintenance

January 23, 2017

What is Electrical Noise and How Can You Prevent It?

In music and everyday life, a tone represents a harmonic sound that sounds good to our ears. The noise, however, is the disharmonic sound that’s everything but desirable. When it comes to the electricity, we can only identify with the noise, as it’s something that can cause you a lot of trouble. This noise is sometimes called ‘electromagnetic interference’ and can disrupt the normal workflow of your measuring instruments such as sensors, for example. Despite the fact that it doesn’t sound too critical or scary, you’ll still need to protect your electrical devices from the noise. Luckily for you, we’re going to explain what exactly is noise and how you can prevent it. Simply put, the electric noise is a disturbance in an electric that causes changes in voltage or current. As we’re talking about the unwanted disturbance, its pattern is often random, sporadic, and can’t be foreseen. When the electric noise occurs, we can always notice a sudden, yet a short increase of voltage or current...

Maintenance

January 14, 2017

Why did My Multimeter Fuse Blow?

A multimeter is something that we’ve all seen but many still don’t know how to use it. Checking your electronic system for faults was never this easy – simply grab your multimeter, set it to a required value and start measuring voltage, resistance, and current. Nowadays, you can find multimeters for less than 10 bucks and even this cheap piece of hardware can come in handy when you need to fault-chek your battery or any other device. But, measuring voltage, resistance, and current is something that’s vastly different, even for your multimeter. When you don’t understand how a multimeter works, you can end up with a blown fuse. This means that your multimeter uses different techniques for measuring these 3 different variables. Trying to measure a certain value in a way that’s used for measuring a different value will cause your multimeter fuse to blow. Well, as we said earlier; it blew as a result of misusing its functions. The multimeter comes with two inserts for positive leads. One...

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