Lathe Reverse

[Clive S]

Hi Clive
Its single phase according to the plate and it has a single capacitor
I hear no click on the run-up or run-down

Its an old Clarke motor that yields very little when run through google :(

Do you know how it was wired originally. Watch the vid till the end

[driftspin]

I have fitted a switch that impliments the bus bar change... it will now run in reverse ok but i get a single thud in foward but no rotation
I swapped live and nutral which i didnt think would make any diffrence but i am now assuming if a swap them back over, it might run forward but not in reverse....?

Attachment 27965

Attachment 27966

If there is something obvious I'm doing wrong, let me know :)
If not, i shall continue the hunt for infomation on this motor.

To reverse in the schematic i posted earlier we may assume the right lead is neutral.

Then the left lead is fase.

when you move the fase wire to the top the motor will reverse direction.

You should check what i am saying next.
In the picture you posted i think the motor wires are all on the bottom row.

Starpoint of the motor is hidden.

Did you draw in green where the actual capacitor is ?





Grtz Bert

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[blackburn mark]

Do you know how it was wired originally. Watch the vid till the end

In its original wiring, it runs counter-clockwise as I face the shaft.... I can get it to run clockwise by rotating the bus bars through 90 degrees BUT I have to also move the Cap from pin2 to pin4 which seems odd and I don't have enough pins in the tumbler switch I have in order to implement that.
I was hoping an expert would reveal how dumb I was and say something like "you reverse it by moving the cap only"



I did, I don't know much about AC motor schemes but that motor looked (and sounded) like a different beast to mine.

[blackburn mark]

To reverse in the schematic i posted earlier we may assume the right lead is neutral.

The left lead is fase.

when you move the fase wire to the top the motor will reverse direction.


Grtz Bert

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Are you saying I just move the capacitor like this or am I doing as I have been and moving the capacitor AND rotating the bus bars?
You will have to excuse my poor grasp of AC motors

[blackburn mark]

Or this....?


We are seeing this from different perspectives my good man
I have a very poor grasp of the underlying/fundamental functions of the varying flavours of AC motors
If this image represents my conundrum, it does so in an abstract that I am struggling to convert into pin numbers.
I don't know how I get four pins from the three nodes

[blackburn mark]

Ah... wait a minute... the three sets of two pins...
My apologies Bert.
I think I'm gaining some perspective, I need to have a ponder on what is going on.

[driftspin]

Or this....?


We are seeing this from different perspectives my good man
I have a very poor grasp of the underlying/fundamental functions of the varying flavours of AC motors
If this image represents my conundrum, it does so in an abstract that I am struggling to convert into pin numbers.
I don't know how I get four pins from the three nodes

Haha yes last 2 pictures work for me.

There is no real difference.
effect is the same.


The bus bars i am not sure of until we know where u1 v1 w1 motor wire go.

What is confusing in the picture is what wires are capacitor and what is the power cord.

Normally motorwires are all below the busbar no need to mess arround with them.

looks like u2 v2 w2 starpoint is hidden in this motor.

Grtz Bert.

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[driftspin]

Haha yes last 2 pictures work for me.

There is no real difference.
effect is the same.


The bus bars i am not sure of until we know where u1 v1 w1 motor wire go.

What is confusing in the picture is what wires are capacitor and what is the power cord.

Normally motorwires are all below the busbar no need to mess arround with them.

looks like u2 v2 w2 starpoint is hidden in this motor.

Grtz Bert.

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Just make sure the capacitor never touches both fase and neutral directly, it will blow the fuse and capacitor too i think.

Grtz Bert

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[blackburn mark]

The u1 v1 w1 (as you call them) must be the three white wires under the "X" symbols
I might be able to make sense after some drawing and thinking :)

[driftspin]

Do you know how it was wired originally. Watch the vid till the end

That is my question now too.

I would expect all motor wires on 1 side actually... may my bad.

Do we agree on the schematic?

Grtz Bert.

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