I installed an inverter on my Chester Eagle 30 and it remained on single speed for long enough until I had reason to go even faster…..even though the inverter was set to 75 hz rather than 50…

All depends on what you are doing…..

I have VFD on the lathe, pillar drill, and milling machine and I do change gear/belt ratios sometimes.

'Sometimes' in my case is about twice a year!

Ian P

I leave mine on the fastest belt position most of the time but change to the slowest if I need really slow speed, for example using a slitting saw.

I uprated the motor power by 50% at the same time to give better low speed torque.

Russell.

I've fitted VFDs to the spindle and power-feed of my Centec 2B and now wouldn't be without it. I've changed the gears only a couple of times over the years, most notably to get the highest possible speed for a tiny cutter, but normally I keep it in the middle gear. With finger tip control of both speed and direction, I even use it for power tapping.

I've also fitted VFDs to my lathe and pillar drill – well worth the effort, in my opinion.

I just simply entered 'vfd' into 'goggle' and guess what? Yep, it recognised it and all the first umpteen hits were in context or close to. I can understand that some acronyms need further explanation, but this one is very well used. The only thing I initially wondered about, was whether the poster was referring to a specific machine without maker's name included.

Seems sensible to use the acronym. If people don't know what it means, they're unlikely to have one, and equally unlikely to be able to offer practical experience, as asked for. Ideally it weeds out the pontificators.

Andrew

For the benefit of M Gilligan, a translation is not spelling out the multiple options in English of three letters. it is giving an answer that would be understood by a Frenchman, or a Ukranian, or a Brazilian.

Tim

Seems perfectly sensible suggestion to me, otherwise you risk leaving the reader in the dust. Take this example of VFD usage from Wordnik:

'We slept at my place after it happened, and for the rest of the time we were in town, because he said he never wanted to look out of the window at the VFD again'. This could be about a Model Engineer upset because his Variable Frequency Drive broke and he can't bear to see it smouldering by the dustbin. Somehow I doubt that, and, once confused, I will waste time decoding the meaning.

Dave

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Despite the fact that the most common definition of an inverter seems to be: "an apparatus which converts direct current into alternating current"

I fear this may not be sufficiently explicit to satisfy Mr. Stevens

MichaelG.

Nevermind the simple, most used option of using "G-oo-gle", a search for vfd in the search box for the forum immediately gives a pretty good indication/description a very short time after clicking on the "GO" tab! If someone goes looking for every possible meaning amongst dozens of acronym meanings should learn the KISS principle!