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Hello, all. Thanks for the response to my original post. You're a goldmine of information. FYI, the drives in question are A-B PowerFlex 70s. Reducing the accel rates per advice from A-B and others did help. Also, (according to AB) virtually any properly-configured drive should outperform...

Questions concering electric motor gearboxes... 1. Are there direct relationships between ratio, speed and torque? I just installed an electric drive. The torque spec on the basic drive (W/O gearbox)is given as 225 ft/lbs and the spec for the entire assembly is 2250. The gearbox is clearly...

We use 460V 3ph squirrel-cage motors here, and I need to get up to speed regarding motor basics. I'm a controls guy with a heavy electronics background, well versed in basic ac/dc theory but little motor experience other than the control end. I don't speak calculus. 1. Is there a relationship...

In the old days, we used to have to attach a very small value electrolytic capacitor across noisy TC inputs. This was a stop-gap measure until the cable or other faulty component was identified and replaced. You will have to experiment with various values to get the right filtering. We've also...

mls1 - Sorry I can't give you the hands-on references you requested, but I considered wireless for an outdoor PLC link a while back and was sold on a company called Synetcom. Go to their website, www.synetcom.com to see if their products are what you're looking for. Regards, and good luck.

Hello, all I'm a process control guy and I'm having to work with VFD-controlled motors more frequently lately. As an old boss used to say, "I'm not sure I understand all I know" about motors. I just built a PLC controlled panel for coordinated control of a conveyor line. VFDs were...