3 phase table saw advice

[Mr_P]

I've been offered a 3 phase table saw at what appears to be a bargain price including delivery.

Only have a normal domestic supply so guess I have 4 options.

1. Forget it and wait / save for a single phase.

2. Buy a 3 phase convertor, not cheap but my bandsaw needs an upgrade so maybe worth thinking about.

3. Replace the motor with a single phase option

4. Get the motor re-wound to single phase.


Any advice greatly appreciated.

 

[flh801978]

4 isnt a option really on cost grounds
3 can work but beware of frame size shaft diameter shaft height shaft length etc and new 240v switch gear overload
2 if you have more than one machine to convert and they similar loads
1 one will come along

Or Variable Frequency Drive on the table saw can be from 100-200 quids ...all come with soft start and variable speed ( not sure how usefull this is on a table saw)

Ian

 

[Mr_P]

Blimey I'm liking the Variable Frequency Drive

http://www.ebay.co.uk/itm/3KW-Variable- ... 257e57a6be

Would this do ?, don't have the specs for the one mentioned above. Will go and have a look if I get a maybe.

My current bandsaw is single phase and not very powerful (yes it has a tuffsaws blade) but if another 3 phase bargain comes along, would this also do ?

 

[wizard]

Before you buy the inverter check that the 3 phase motor on the saw is duel voltage

 

[merlin]

I was in a similar situation a few years ago and went for the 3 phase convertor, apart from the initial outlay of the unit itself it opened up a whole new choice of machines.

I originally bought one that only had one output setting to run a drill and a grinder , that soon became too restrictive because of the tools I then wanted to buy.

I talked to Pete at Transwave and he sorted me out a great deal which ended up with me having an adjustable power outlet, this gave me an even bigger range of machines I could choose from.

Merlin

 

[RogerS]

If you go down the inverter/converter route just make sure you have the 240v power available, fuses, cable size, MCBs etc

 

[Mr_P]

Well after watching a few table top hobby machines fetch silly money decided to take the plunge and buy the industrial beastie.

Have I just got very lucky again ?

Am I reading this correctly in single phase mode it uses 7.9 Amps and in 3 phase it uses 4.55 Amps.

So it will work on a domestic supply ?

The plate was well hidden and upside down so had to stick my camera in and take loads of pictures to get this one.

 

[flh801978]

No its still a 3 phase motor
All motors are 240v/415v
Just some are easier to wire into 240v mode...as yours is.
Buy a VFD and away you go on a 13 amp socket
Ian

 

[Mr_P]

Good News / Bad News / Good News

I was very lucky after all. Just applied a significant amount of elbow grease to the table and I think it will come up almost as good as new.

Just nearly had an attack when I had a quote for a new 240V motor, the 24mm pulley alone would cost more than the machine did.

So it looks like I'm going down the VFD route.

Just some are easier to wire into 240v mode...as yours is.
Buy a VFD and away you go on a 13 amp socket

Sorry to be a pain Ian but can you explain why ?

Any advice on which one to pick ?

Thanks again,
Carl

 

[flh801978]

Well you just connect the vfd to the mains via an isolater switch to comply with regs
Change the motor over to delta connection in the terminal block
Connect directly the vfd to the motor...nothing else inbetween
Depending on the type of vfd that's all mount the vfd somewhere you can use the control panel and set a few parameters and that's it.
The vfd you linked to is at the cheaper end lots of other brands but lots more money
You can wire in start and stop switches to the vfd

Ian