Help with 2.2kw electric motor

[DIYFarmer]

Hi all,

I’m new here so thanks in advance.

I have removed a single phase 2.2kw motor from a compressor in order to put it on a table saw.

The motor runs fine when not under load. When I connect it to the saw and start it however, it blows the 13a fuse in the plug.

I have subsequently wired it into a 3 phase starter (as that is what I had) and the same thing continues to happen with the 13a fuse.

What could I be doing wrong here?

Or is it simply a case that the motor is drawing too much power under when under load for the 13amp plug?

Thanks in advance

 

[Strima]

What could I be doing wrong here?

Bodging a motor onto a very sharp thing that spins very quickly?

 

[westward10]

Was it connected through a 13A plug when on the compressor.

 

[DIYFarmer]

Bodging a motor onto a very sharp thing that spins very quickly?

Yes

 

[Spoon]

Take a pic of the info plate on the motor and post it up?
How are you wiring it?

 

[DIYFarmer]

Bodging a motor onto a very sharp thing that spins very quickly?

I don’t see this to be an issue. It had a very old motor on previously that would not work. Simply a belt running from the motor to the saw.

 

[ruston]

And how is the gearing driven? Have you the same combination as before?

 

[Strima]

It's never seen as an issue until something goes wrong.

 

[DIYFarmer]

Take a pic of the info plate on the motor and post it up?
How are you wiring it?

View attachment 40403

Blue and brown wires are from power

 

[DIYFarmer]

Was it connected through a 13A plug when on the compressor.

Yes it was

 

[DIYFarmer]

Thanks for all of the replies so far, still struggling to get my head round it!

Might it be a problem with a capacitor?

 

[Strima]

View attachment 40405

Typical DIY lash up...

 

[MJPD29]

Typical farmer, won't buy a new one so butchers something else and makes it dangerous instead

 

[DIYFarmer]

Typical DIY lash up...

Could you please explain what I have done wrong here?

 

[DIYFarmer]

Typical farmer, won't buy a new one so butchers something else and makes it dangerous instead

It is a compressor that is not required and the motor is in working order.

The table saw is fine, it’s motor is not working.

In my eyes that seems like a sensible thing to do?

 

[Strima]

All I will say is leave it alone. If the table saw needs repairing then pay a professional to do it.

Saying that it sounds like you've probably had it lying around for years and it has zero safety devices fitted anyway.

My advice is to leave electrics to electricians.

 

[Spoon]

Saying that it sounds like you've probably had it lying around for years and it has zero safety devices fitted anyway.

That's why I asked how he's wiring it.

 

[westward10]

Does it run okay with no load to the motor.

 

[Gaby Hill]

Hi all,

I’m new here so thanks in advance.

I have removed a single phase 2.2kw motor from a compressor in order to put it on a table saw.

The motor runs fine when not under load. When I connect it to the saw and start it however, it blows the 13a fuse in the plug.

I have subsequently wired it into a 3 phase starter (as that is what I had) and the same thing continues to happen with the 13a fuse.

What could I be doing wrong here?

Or is it simply a case that the motor is drawing too much power under when under load for the 13amp plug?

Thanks in advance

Seriously you should leave it to us professionals. You really shouldn't be messing around with the wiring and it's obvious your basic knowledge is redundant! For gods sake take it to an electrician or bin in it! Bloody farmers

 

[DIYFarmer]

Does it run okay with no load to the motor.

Yes runs absolutely fine with no load.

 

[Gaby Hill]

Yes runs absolutely fine with no load.

You're used to having no load

 

[westward10]

If it runs fine without the belt putting load on it then the loading is the issue.

 

[ruston]

Maybe the blade is cutting the wrong way lol

 

[PEG]

What was the rated rpm,of the motor you removed?

 

[ruston]

And did he change the pulley.

 

[Pete999]

Hi all,

I’m new here so thanks in advance.

I have removed a single phase 2.2kw motor from a compressor in order to put it on a table saw.

The motor runs fine when not under load. When I connect it to the saw and start it however, it blows the 13a fuse in the plug.

I have subsequently wired it into a 3 phase starter (as that is what I had) and the same thing continues to happen with the 13a fuse.

What could I be doing wrong here?

Or is it simply a case that the motor is drawing too much power under when under load for the 13amp plug?

Thanks in advance

The mechanical loading of the table saw could be a lot more than the compressor, causing the motor to try and work harder, thus blowing the plug top fuse, if it runs OK under no load conditions, then you have your answer.

 

[PEG]

Seen a few DIY 1400/2800 mishaps,also motor swaps minus separate start/run capacitors.

Compressor may have had unloader valve,to assist starting...or saw might be that one off Laurel and Hardy,with the giant band,with associated tomfoolery

 

[DIYFarmer]

The mechanical loading of the table saw could be a lot more than the compressor, causing the motor to try and work harder, thus blowing the plug top fuse, if it runs OK under no load conditions, then you have your answer.

I believe that this must be the case. The previous motor was 3 phase 1420 rpm. I presume that this motor simply doesn’t have the umph?

And did he change the pulley.

The old motor was pully-less (must have been taken for something else at some point in history) so put one on I had that fitted. Think new was bigger than old (based on the belt)

What was the rated rpm,of the motor you removed?

1420

If it runs fine without the belt putting load on it then the loading is the issue.

Think that this is the case

 

[Strima]

And did he change the pulley.

No need, it's only a 3' blade...

 

[Strima]

What speed is the saw rated at?

 

[DIYFarmer]

Seen a few DIY 1400/2800 mishaps,also motor swaps minus separate start/run capacitors.

Compressor may have had unloader valve,to assist starting...or saw might be that one off Laurel and Hardy,with the giant band,with associated tomfoolery

Not too dissimilar!

Yes I see now it is a 1400/2800 mix up.
The answer then I presume is a 2800 rpm motor. Would 3phase be better than 1?

 

[westward10]

Three phase will nearly always be better.

 

[DIYFarmer]

Three phase will nearly always be better.

Thank you

 

[ruston]

Presuming you are cutting trees up for logs?

 

[DIYFarmer]

Presuming you are cutting trees up for logs?

Just old timber for kindling really

 

[PEG]

Right,so starting torque is over-loading it,and your fuse has saved you from real-time balance testing that blade,at max rpm x 2

I know the set up,as i spent many hours on a Lister table saw,and then converted it to a 540 tractor PTO drive...obviously,skipping the many current covenants,regarding HSE.

You will have the blade cover off? and probably even the riving knife...so,take care,fella.

 

[ruston]

You have had a similar upbringing to me lol.
We had an old Fordson Major with a pulley drive .
And the local sawmill was steam driven and the sawyer lived in an old horse drawn caravan . I forget the proper name.

 

[Darkwood]

Can we just remind some members that if you disagree the OP should be doing such work then explain it in a constructive manner, lets not lower the tone of the thread please.

 

[Strima]

I have a picture in my head of a 3’ rusty saw blade skitting across a farmyard causing untold mayhem and destruction...

 

[PEG]

You have had a similar upbringing to me lol.
We had an old Fordson Major with a pulley drive .
And the local sawmill was steam driven and the sawyer lived in an old horse drawn caravan . I forget the proper name.

"Vardo" is Romanes for such,"Kennik" is a house,for gavers such as mandi

Me pal used to drive to school,at 13,on a Major,and his dad had a Super Major,a six cylinder beast which sounds tame now,with most of the lads i know with larger farms,running 160-300hp JD's.

I've run a threshing box,off a side PTO belt,on an old Fergy,and thought the wire tied baling machine,was great

The old fella (long gone,sadly) was vocal,in explaining we were only playing with it,and it was less fun,when it was all manual labour to cart those lumps all day long,and through the night!

 

[DIYFarmer]

Right,so starting torque is over-loading it,and your fuse has saved you from real-time balance testing that blade,at max rpm x 2

I know the set up,as i spent many hours on a Lister table saw,and then converted it to a 540 tractor PTO drive...obviously,skipping the many current covenants,regarding HSE.

You will have the blade cover off? and probably even the riving knife...so,take care,fella.

Thanks!! Think it’s going to be a case of a second hand saw. Same price as a new motor!

Point taken & understood about max rpm x 2!

 

[ruston]

@PEG . We also had a little Dexta with a rear end muck loader . I absolutely hated it . I blame that for my bad neck.
My favourite was the Massey 65 and my little International 414 , then the rot set in and we got a Zetor...

 

[PEG]

Them 3 cyl Dextas are big money,now,and the 65 was a great tool,the newer 165 with Multi-power,even better.
I have no issue with the Zetors,and still end up doggin the odd one up,having rebuilt a front hub epicyclic unit,on a 7245 4wd,last year.

Two speed,independent PTO,separate heads and liners easy out,centrifugal oil filter...Good ole' Czecks

 

[ruston]

To be honest I never got to work on the Zetor . But after I went to a 'proper job' they had a lot of bother with it . It was one of the first imported to this region . I must admit it drove nice . Going back to the early /mid sixties here.
The Massey 65 was nearly bulletproof.
I drove one again a few years ago on a neighbours old farm that had not changed in 70 years . Sadly he is gone now , but some of the 3 hundred year old buildings are almost still standing.