For Sale - Record BS350 Bandsaw

[slemishwoodcrafts]

Were do the inverters go for 80-100? I assume it might be ebay, but there must be other places as well? If I could get one for that sort of money I would seriously consider it.

Regards,

Michael

 

[big soft moose]

yeh you can use an inverter, as demonstrated by Bob 9fingers. It's a toss up between finding a motor that fits both the bandsaw case and the pulley or keeping your eyes peeled for an inverter. Bob says they go for between 80-100 if you keep looking. Simples.

that sounds like a plan - especially as i could then look for a three phase lathe later if i wanted to - like a graduate bowl turner, plus all sorts of other three phase goodness ( i saw a nice wadkin planer on ebay for example ) - i may need a bigger 'shop

or maybe not both the 351 and 352 would appear to be 415v machines and 240v single to 415 three phase inverters appear to be considerably more expensive.

me thinks i need to talk to bob before i make a decision

 

[wizer]

I'm not going to pretend I understand what suits what, but:

http://cgi.ebay.co.uk/ABB-DRIVE-INVERTE ... 0433575502

Bob?

 

[9fingers]

I'm not going to pretend I understand what suits what, but:

http://cgi.ebay.co.uk/ABB-DRIVE-INVERTE ... 0433575502

Bob?

Nope! That one is 3phase in and 3 phase out

For use on domestic mains, a single phase input one is needed and a motor capable of running on 240v 3 phase.

Does no one read the document I spent ages putting together? :lol:

Bob

 

[wizer]

Right, so the motors in the bandsaws that Pete linked to are not suitable to use an inverter? I didn't realise that the motor had to be 240/3 phase (or that there was a difference). That makes picking up 2nd hands machines on eBay a bit tricky.

 

[big soft moose]

presumably you could use a 415 motor if you got one of these http://www.drivesdirect.co.uk/Products/ ... 40_415.htm but the price makes it unattractive

i think i'm back to swapping the motor - or just buying a single phase saw in the first place.

when i buy/build my own place i'm defintitely running a 3 phase line into the shop - but i'm currently renting so that isnt an option at the moment

 

[9fingers]

Pete, you need to look at the motor rating plates.

I'd be surprised if the motors fitted to modern saws like the 351/352 are not dual voltage.

Bob

 

[big soft moose]

Pete, you need to look at the motor rating plates.

I'd be surprised if the motors fitted to modern saws like the 351/352 are not dual voltage.

Bob

this is the one on the 352 that G&M have - looks to be 415 only to me

 

[9fingers]

Not necessarily Pete, that is plate on the saw.

It just means the contactor is 415v. if the motor is dual voltage and you fit an inverter, the inverter will provide the NVR function.

I have an 18-s-1 and older model and that has a dual voltage motor

Bob

 

[big soft moose]

Not necessarily Pete, that is plate on the saw.

It just means the contactor is 415v. if the motor is dual voltage and you fit an inverter, the inverter will provide the NVR function.

I have an 18-s-1 and older model and that has a dual voltage motor

Bob

thanks for the info bob - i'll contact G&M tommorow and ask them to check the motor plate for me ( i dont want to drive all the way to sussex only to find that it is 415 only)

 

[wizer]

Bob, I take it the inverter has to match or be greater than the HP of the motor?

 

[9fingers]

The inverter should ideally match but can be up to say 100% more high rated provided that it is then programmed for a smaller motor. This ensures the motor is adequately protected in use.

Most modern inverters do measure the motor parameters at power up but have not got quite clever enough to read the rating plate in full. :lol:

Bob

 

[dickm]

Moose
Not sure that just reading off the MOTOR plate will tell you what you need to know. With due deference to Bob, won't you need to look inside the connection box on the motor to be sure whether it is dual voltage? That is, to see whether it can be connected both star and delta for the different voltages?

 

[9fingers]

Agreed: Always worth checking every angle.

Typical dual voltage motor plate here

Note the two voltage ranges and the delta symbol and rather faded Y for star as well as the two different current ratings for the two modes.

I must admit to never coming across a dual voltage motor that was not marked as such on the plate but there could always be a first time for everything.

The terminal block **** refers to look like this

Wired for 240 volt delta operation (straps vertical)

and wired for 415 volt star operation like this (straps horizontal)

Despite my years of tinkering with motors, I picked up a used 3 phase motor last year for a job, opened up the cover and saw the 6 terminals but it turned out to be star only! I think it had been re-wound at some stage and the rewinders had saved some time and a few inches of wire by only bringing out 3 star connections.
So it is always just possible to get caught out

Bob