Blog: Motion System Design

Linear Systems: Lead screws, Ball screws and Linear Slides

With this posting, we’ll begin a discussion about leadscrew/ball screw/linear slide systems. Picture a screw with a nut on it. No, no not a Walnut.  Sighhhh. OK then, picture a right-hand threaded 1/4-20 screw with a 1/4-20 nut threaded on to the screw. A 1/4-20 screw has an outside diameter or major diameter of 0.25” and the thread of the screw has 20 turns per inch. Thus, the name is a 1/4-20 screw. The valleys of the threads are cut into the screw’s shank and are referred to as the root diameter or the minor diameter.

Fundamentals of Motion Control

Recently I came across a simple infographic from Power Jack Motion that did a nice job of visualizing the difference between alternating current (ac) and direct current (dc) motors. This article will follow and present the information contained therein. What is Motion Control, Anyway? Motion Control is a sub-field of automation encompassing the systems or …

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Sizing: Ringing and inertia mismatch

I’m sorry if you Googled “ringing” because of a hearing issue and end up on this blog. You should Google “tinnitus” instead or search the WebMD site. Now where were we? Oh yea, in our last posting we were talking about load-to-rotor inertia matching. We had established the following load-to-rotor inertia ratios: