Back to top

These 3 characteristics are crucial when sizing a motor for any application from military to industrial and beyond. In this day and age where everything seems to be getting smaller and more compact, we all want our toys to take up less space, but we don’t want to sacrifice any performance. Let’s use cars as an example. When someone is shopping for a sports car, they may be looking for things like high speed, quick acceleration, low center of gravity, small body, etc. These are all reasonable things to look for in a sports car. However, if someone was to say, “I need a two-door sports car with a top speed of 160mph, but I also need it to tow my 10,000 lb trailer”, we might have a problem. This is the same principle when we’re talking about motors. Just like cars, generally smaller motors have much higher speeds than larger motors. However, the large motors are the ones towing that 10,000 lb trailer, or in our case, exerting the most torque.

Search the web for frameless or kit motors and you will find many offerings to choose from.  When looking at the motor specifications, there are many important parameters to consider such as rated speed, rated current, peak current, etc.  What do all these things mean and why is it important to understand how the values are being presented?

Usually, in discussion about these terms, we tie in the word actuator – so more precisely, what is the difference between a linear actuator vs a rotary actuator?

Linear actuators, in essence, move something along a straight line, usually back and forth.  Rotary actuators, on the other hand will turn something a number of degrees in a circle – it might be a limited number or an infinite number.

So, linear actuator – back and forth, Rotary actuator - round and round

We’ve covered feedback devices before in our Blog in Motion posts, but today we want to touch base on current trends we are seeing related to feedback devices for servo applications. We asked Dan Wolke a few questions about where we see the market heading.

Last time in our Block and Tackle Series on “What is a Linear Actuator?” we identified the general types of mechanisms that are used to move loads in a straight line.  Today’s blog expands on that just a bit with a few more details on the different types used in the motion control world.
Mechatronics is taking a holistic look at a complete machine solution, taking account of all elements that make up that system that are part of the machine, including mechanisms, motors, drive electronics, controls, interfaces, and ergonomics.  A variety of disciplines are involved when considering a machine design utilizing a mechatronics approach. It is a melding of the physical expectations of a motion system whether mechanical, electronic, hydraulic, pneumatic or any hybrid of technologies used to accomplish a physical task. Often, these systems are trying to duplicate, simplify, or assist a human function, most often a repetitive motion that a machine can do better.

Question: What is a linear actuator?

Answer: Quite simply, a linear actuator is a device that moves a load in a straight line.  Linear actuators come in many styles and configurations – our blog post today covers those actuators associated with motion control.

In our last blog related to decentralized drives, we indicated several key customer benefits tied to using this approach.  First, you can reduce your cable costs significantly in machine configurations with lots of axes spread apart throughout the machine.  Second, a reduction in cabinet space and cooling requirements since you’ve taken a number of heat producing elements (Servo drives) from the enclosure.  Thirdly, you increase flexibility in design. In this blog entry, we will explore what is meant by flexibility and how this offers several advantages.
Less Cabling, Smaller Cabinet, Less Heat…More Flexibility!  Less Cabling, Smaller controls cabinet, Less heat…wow, that’s all great stuff.  I can achieve this all with a decentralized solution?   Absolutely – and even more! Decentralized Control Architecture means shifting the motion control drives from the crowded cabinets, and moving them near to the motors – out on the machine where the action is.  Immediately you can see that this can reduce the size of the controls cabinet, moving all of those drives out onto the machine – but how do I see these other advantages?

Question: What does TENV, or Totally Enclosed Non-Ventilated mean in regard to a servo motor?

Answer: Well – the answer is simply the motor is Totally Enclosed, and Non-Ventilated. Based on NEMA (National Electrical Manufacturers Association) definition, TENV states that the motor housing is fully enclosed and is not ventilated with a fan.

Pages

Blog Taxonomy Helper

Aerospace & Defense
Applications
Automated Guided Vehicles
Business
Embedded Motion
Engineering
Fieldbus
Food Regulations
General
History
Installation Tips
Interconnectivity
Medical
Oil and Gas
Packaging
Robotics
Technology
University Partnerships
Subscribe to Blog in Motion