chale4
Plastic
- Joined
- Nov 9, 2011
- Location
- Colorado USA
Hi all,
So I’ve begun to buy and install some very basic little VFD’s, the KB Electronics KBMA-24D, very simple and easy to use. I’ve installed one on my J-head Bport, a-ok, never going back. The first one I bought, tho, well, I installed it on my old Walker-Turner 14” bandsaw; turned it on, got a rather distinct high-freq whine out of it, ran the motor a few 10s of seconds, and then...it croaked. Says it’s in short circuit sensing condition, even with nothing at all connected to it. Sigh. The eBay seller just sent me another (didn’t even want the dead one back, it appears) and that’s the one happily (and quietly) chugging away on the mill. So this THIRD unit, put it on the saw, again, and it’s whining loudly but doesn’t seem to be failing after a good few minutes running, no load yet. It’s just a plain-Jane 3ph motor on the saw, I find it hard to imagine it’s somehow blowing these things up (and indeed, the 1st unit may have simply been an “infant mortality”, ok; the seller certainly seemed to think so), but, ..what do you folks think? How come the 1960’s era 3/4 hp pancake motor on the Bport is quiet and this much newer 1 hp 3ph saw motor is whining up fairly close to my 60 yr old ears range? Is this indicative of it gonna fail soon, too? Thanks—C. Hale, Lafayette CO
So I’ve begun to buy and install some very basic little VFD’s, the KB Electronics KBMA-24D, very simple and easy to use. I’ve installed one on my J-head Bport, a-ok, never going back. The first one I bought, tho, well, I installed it on my old Walker-Turner 14” bandsaw; turned it on, got a rather distinct high-freq whine out of it, ran the motor a few 10s of seconds, and then...it croaked. Says it’s in short circuit sensing condition, even with nothing at all connected to it. Sigh. The eBay seller just sent me another (didn’t even want the dead one back, it appears) and that’s the one happily (and quietly) chugging away on the mill. So this THIRD unit, put it on the saw, again, and it’s whining loudly but doesn’t seem to be failing after a good few minutes running, no load yet. It’s just a plain-Jane 3ph motor on the saw, I find it hard to imagine it’s somehow blowing these things up (and indeed, the 1st unit may have simply been an “infant mortality”, ok; the seller certainly seemed to think so), but, ..what do you folks think? How come the 1960’s era 3/4 hp pancake motor on the Bport is quiet and this much newer 1 hp 3ph saw motor is whining up fairly close to my 60 yr old ears range? Is this indicative of it gonna fail soon, too? Thanks—C. Hale, Lafayette CO