Medical Devices

You may be at the point of looking at adding feedback to your mechanics in order to make them more precise or to capture some of the errors I discussed last episode in Episode 20. But, you may also be wondering about some of the problems that can cause.

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I have a question for you:  Do you embrace linear encoders?  Or do you avoid them whenever possible?  Or are you wondering what a linear encoder even is?  After all this sizing and selecting of mechanics, and even designing your own mechanics, you might be considering putting a feedback device on there and whether you should or not.

LOSTPED is an acronym where LOSTPED stands for Load, Orientation, Speed, Travel, Precision, Environment and Duty Cycle.  But, what does it REALLY mean?

A common topic when putting together a motion control system and a gantry is whether to use end-of-travel limit switches, home sensors or absolute encoders. This really depends upon the application. So, let's talk about the pros and cons.

You cannot just start on the mechanics, pick the motors, pick the drives, pick the controls, pick the HMI.  First you must understand everything all together.  Since we're talking about mechanics, there's a few things we need to kind of jump on right off the bat.  To figure out the holistic approach, there's a lot more to it.

When we size, select, and design gantry systems such as this one, we must make sure that we take into account the whole framing that this is going to be mounted on.

Back in Episode 6, I explained to you the different types of linear mechanics.  This included ballscrews, belt & pulleys, linear motors and even rack & pinion.  I get the question all the time: which linear mechanics do I use?