Servo Tuning: Inside the Performance

Get the inside story on four ways a servo can be tuned to boost its productivity in industrial automation. Yaskawa's online educator offers details on settling time, inertia compensation, vibration effects, and parameter adjustment, then describes features of Yaskawa servo systems that address the four most common tuning challenges.

Transcript

00:00:01 in these two boxes you'll find all the servo tuning capability you'll probably ever need Yaskawa servo systems tune themselves right out of the box but if you're the type who likes to understand the inside story you're gonna want to stay tuned the servo systems of years gone by are a lot different from the servos we're creating at the Scala today back in the

00:00:35 day tuning a servo called for technical knowledge plenty of engineering experience and a lot of experimentation by trial and error today a Yaskawa servo delivers successful motion control from the moment it is installed each system has Aeschylus exclusive tuning las' mode that consistently retuns itself to overcome changes in the machines inertia it's automatic you don't need to lift a

00:01:04 finger on top of that there's advanced Auto tuning that's the best in the industry it practically eliminates settling time even with inertia ratios as large as 30 to 1 there's also a vibration suppression feature that effectively neutralizes machine vibration plus one parameter tuning a fine tuning mode that gives you the freedom to manually adjust game levels

00:01:28 without throwing your existing tuning out of balance let's start our exploration in the demo room with tuning las' mode tuning this mode is a feature you'll find exclusively on Yaskawa servo systems and it works from the moment you first power up in tuning mode the amplifier automatically and continually adjusts its own tuning gates without any

00:01:53 intervention from the operator tool English mode makes consistent speed and accuracy possible in almost any application even complex ones like this compound robot arm when the arm is extended it's generating greater inertia than when it's compressed in tuning this mode the servo responds to the change in inertia and delivers equal precision at every position

00:02:19 watch what happens when we turn tuning list mode off here's to Lewis mode on and now it's off again the result is a servo system that can achieve exceptionally high speeds without sacrificing precision and reliability and best of all you don't need to do a thing to make it happen the second major feature built into Yaskawa servos is advanced auto tuning

00:02:57 we call it advanced auto tuning because no one has advanced the art and science of auto tuning as much as he scour advanced auto tuning is especially strong and overcoming an effect called settling time the inertia generated by the spinning of a servo causes it to overshoot its set point slightly then it turns itself back to compensate now the time it takes to make this small

00:03:24 correction is called settling time settling time is usually only a fraction of a second but add up those fractions of a second over a year and you can have hundreds of hours of lost productivity the average servo system has an auto tuning feature that cuts settling time down to 15 milliseconds right out of the box via Scala tuning this mode cut settling time down to 40 milliseconds

00:03:50 turn on yasawas advanced Auto tuning and you can have a settling time of 4 milliseconds that is only for one thousandth of one second practically zero most world-class servos can auto tune to a settling time of 15 milliseconds with a strain of a 5 to 1 inertia ratio Yaskawa can deliver 4 milliseconds settling time when stressed by a thirty to one inertia ratio that is

00:04:22 six times better than the industry average in performance implementing advanced auto tuning is as easy as selecting it in Sigma wind plus the software you use to setup your servo system after that it works constantly and automatically the third tuning benefit we'd like to focus on is vibration suppression vibration suppression is built into

00:04:50 advanced auto tuning and it is another feature that is only offered by a scalloped but instead of just talking about it why don't we see it at work this demo unit was designed to make machine vibrations very easy to see right now the system is operating without vibration suppression applied but let's apply a vibration suppression see the difference the servo system

00:05:16 detects the vibration created by the machine it's connected to and then creates an opposing oscillation to cancel out the original vibration vibration suppression off vibration suppression on can you imagine the effect this feature has on a machines operating efficiency thus far we've covered tuning loose mode advanced Auto tuning and vibration

00:05:49 suppression these three features cover the vast majority of tuning dates but as we've seen a small improvement can make a big difference in terms of efficiency and profitability and that's why your Scala offers a custom tuning capability our one parameter tuning feature allows you to adjust gain settings without throwing the other tuning parameters out of adjustment one parameter tuning means

00:06:14 that you can tweak what you want to tweak or let the system adjust itself it's up to you if you run into problems with any type of tuning you can turn to the most sophisticated tuning resource of all Yaskawa technical support an expert in servo system tuning is always a phone call away to address tuning issues or any other servo problems strong support is one of the biggest

00:06:41 reasons that automation professionals choose you scour the scour people will always stand behind their servo systems with support that is prompt personal that's our promise Escala will always be there dedicated to you and your success