3 phase help required (pretty please)

[Anonymous]

Hi guys

I was just wondering if anyone would be kind enough to help me, I have been offered a great big wapping wadkin saw but its oviously in 3 phase, i have taken a pic of the motor plate (below hopefully)

if anyone could help me or advise me on how to get this running off 240v

i would very much appreciate it

ps i have read 9fingers help guide, but unfortunatly electrics and myself are polars apart so what ever help i get will be passed onto someone that knows how to configure the motor correctly.

I like the sound of a plug and play invertor??

Cheers

Mark

 

[flh801978]

That motor will be expensive ( circa £300-500 ish) to plug and play

Its a 415 volt motor only as it stands

You can get someone to rewire it to make it dual voltage but that costs

then you need a inverter for 3 phase 240v which will be cheaper than a 415 one but still in the region of £200 for a reasonable quality one.

And lots of control wiring too

You may find it easier to fit a new single phase motor

Ian

 

[Anonymous]

Thanks for the swift reply Ian

Well its a huge 8 x 4 sliding bed table saw with a scribe motor which has set me back 600 quid, and fully serviced too. So i don't mind paying a few hundred quid more to get it working, but obviously in this current climate the cheaper the better.

I am not sure which idea would be best as i think it may well have a seperate motor for the scribe?? I should have checked shouldn't I?

Do you think 600 hard earned 1's is a good price for this?

 

[Chems]

I think you need an inverter. May be easier to buy a new single phase motor.

 

[Anonymous]

How would i go about sorting out a new motor? who would i need to see??

Sorry for all the questions.

Thanks in advance

Mark

 

[big soft moose]

it looks to be wired in delta rather than star so swapping it to dual voltage ought to be a PoC - then you'd need an inverter 240 single to 240 3 ph

have a look a drives direct on ebay for inverters.

you could also shoot bob (9 fingers) a pm because he is vbery good on stuff like this - he might even come do it for you if you offered him some beer vouchers (tho you might be a lil far from romsey - i dont know what bob considers a reasonable distance)

 

[Anonymous]

ive just spoken to drives direct, they reckon it will cost 1095 + VAT

more than what i paid for the saw itself, although i will say they were very helpful.

hopefully 9fingers will read this post and reply?

 

[woodsworth]

I think they are just trying it on! I got a 7.5 KW inverter and had 6 points wired with a panel, supply line, etc and some 240 power points as well with inverter cost me just under £1100.

 

[Anonymous]

I am at a loss as to what to do?? new motor? inverter? rewired??

grrrrrrr

 

[big soft moose]

I am at a loss as to what to do?? new motor? inverter? rewired??

grrrrrrr

i'm far from an expert but i would have thought something like this

http://cgi.ebay.co.uk/7-HP-240V-415V-3- ... 5ad8ee5bd3

for the inverter , and getting either bob or someone like him to do the wiring to dual voltage is the way to go

for 6HP its bound to be relatively pricey (and ive heard that you need more than the ammount its rated for due to start up demand)

if you go motor replacement, finding a single phase 6hp wont be easy - most of the sites ive looked at seem to stop at about 2.2kw, plus you have the issue of making the drive spindle fit on the shaft.

a third option might be to run an 3ph supply into your workshop - but that wont be cheap either, tho it does have the benefit that if you acquire more 3 phase machines later you will already have power on the premises

 

[Doug B]

http://cgi.ebay.co.uk/TRANSWAVE-3-Three ... 3505wt_939

I`ve got my stuff from Transwave, even though Direct drives is only 10 minutes away from me, enough said.

For a digital inverter the motor has to be the right type & there is wiring & programing to do, where as a converter you can plug in & go.

 

[flh801978]

Relooking at the motor plate I dont think that that motor can be wired for 240 v operation as its already wired delta for 415. so you would need an inverter with step up to go with that motor.

I think a new or secondhand single phase motor and control gear is prob going to be the cheapest and easiest ( or 2 motors for the scribe)

 

[big soft moose]

hopefully 9fingers will read this post and reply?

ive just sent bob a heads up by pm

 

[Anonymous]

Really appreciate your help guys, thanks BSM for doing that, all this info is really very helpful.

do you think its a good price for the saw? (600 quid) will it be worth converting?


Many thanks again

Mark

 

[Digit]

Being a good old Brit design and spec, (need a Union flag smiley here) whatever you do you will need to factor in the cost of a pretty hefty power supply. The motor is specified for output, not the fancy Nipponese BS of input power, so you will be looking at an input power in the region of 7kws!

Roy.

 

[woodsworth]

is that motor really 7 KW's? I find that hard to believe. I had an old Wadkin before my current one and it was a 3 KW motor. My bandsaw is a much bigger motor and is only 5 horse power. What size blade does it have?

 

[big soft moose]

Really appreciate your help guys, thanks BSM for doing that, all this info is really very helpful.

do you think its a good price for the saw? (600 quid) will it be worth converting?


Many thanks again

Mark

have you bought it already - if not i would ask yourself whether you really need a 5hp saw or whether a smaller unit would be more suitable

600 notes for a 5hp saw is a good buy , but £1675 (factoring in the quote from drives direct) is rather less good - certainly you could get a lot of single phase sawy goodness for 17 hundred notes

 

[Digit]

The commissioning plate gives the output as 3.7 Kw, if the motor is original we would expect about 60 per cent efficiency based on its probable age, allowing for start ups I think 7Kw is a reasonable assessment. We'll see what Bob has to say.

Roy.

 

[big soft moose]

is that motor really 7 KW's? I find that hard to believe. I had an old Wadkin before my current one and it was a 3 KW motor. My bandsaw is a much bigger motor and is only 5 horse power. What size blade does it have?

it says 3.7kw on the motor plate , which is about 5hp (4.9333 (recuring) to be exact

 

[Anonymous]

its pretty much like this one but a bit older, the way i am looking at this is, this one is 1650 plus vat, i have got mine for 600 all in, so even if it costs me a few quid more i am still a winner?

http://cgi.ebay.co.uk/Wadkin-SP12-Panel ... 255a3e236e

or maybe i am not?