deema":2yme9agp said:Wow, 6” thick steel and above....that’s some weight and some section!
deema":2yme9agp said:Anyway, an inverter is a term usually used for an electronic gizmo that takes DC (usually a battery) and coverts it into AC (such as mains voltage).
deema":2yme9agp said:A VFD has a rectifier input stage that takes the AC and converts it into DC and then an inverter stage that chops it back up into the required AC.
In context of the reply, I think he has a box of tricks that takes single phase and producers 3phase. It’s just a 3phase output and does not control the speed of the motor which a VFD can do, They are normally called passive or rotary converters. However, the technical names get used generically and most people would understand inverter. A well known brand is Transwave who make both passive and rotary converters.
ljkenny":2cflck6l said:Cutting stock larger than I can reasonably fit in my 150mm horizontal bandsaw.
How does your inverter differ for a standard VFD?
Myfordman":33t2jpe4 said:https://www.ukworkshop.co.uk/forums/modifications-to-a-startrite-bandsaw-t38613.html
This is an old thread about mods to my 18-s-1. the photos have been blurred by photobucket but you should be able to make out a second small poly vee pulley on the motor running on a smooth mdf pulley driving the band wheel making the machine an 18-s-2 is startrite speak. the extra pulley system and an inverter make the machine highly suitable for cutting metal including steel.
TFrench":33t2jpe4 said:ljkenny":33t2jpe4 said:Cutting stock larger than I can reasonably fit in my 150mm horizontal bandsaw.
How does your inverter differ for a standard VFD?
Sorry I wasn't clear - its a VFD I've fitted to it. Had I known at the start how my workshop would end up, I'd have been much better off just getting a big rotary inverter so I could have proper 3 phase. Overall I'd have saved money by not buying multiple VFD's (got 3 currently, plus a static converter) although having variable speed is very nice on the lathe, and I think it will be handy for the pantograph as there's very little torque involved with that. Bear in mind these old startrites are very heavy - if this is for home use you'll need a way to move it. I used a genie manual lift to get it out of my van and I've welded feet to the bottom for castors. If I want to stabilise it I can wind down feet as well, although I've never needed to do that yet.
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