Import Lathe Contactor Questions 12x37

[Anatol]

I'm looking in after being preoccupied for a week or so.

In post #28, you said
"Problem is there's no ground on the low voltage side, so I left it off."

Just in case you're working with inaccurate concepts -
There is no such this as 'ground's an AC circuit. That is concept in DC, and its spurious anyway.
In AC you have 'active' and 'neutral' (which is not 'ground). The only ground is the earthing of the chassis to ground for safety. (As ignator mentioned). In transformer, there is no conduction between primary and secondary windings (unless its an autoformer) . Electricity induces magnetism which indices electricity.
So if you left the 'ground' off, you failed to make a circuit.

Ignator also mentioned " there have been schematics that show a transformer with a 6volt output winding. Your transformer does not have this (old or new)."
So what happened to that 6v line - what was it doping? I suspect it was for a6v bulb,made obsolete by some fancy LED replacement (just a guess)

hope that's useful or at least interesting

 

[lou]

Does your machine have a foot brake if so check that is not activating?

 

[StephenZ]

I'm looking in after being preoccupied for a week or so.

In post #28, you said
"Problem is there's no ground on the low voltage side, so I left it off."

Just in case you're working with inaccurate concepts -
There is no such this as 'ground's an AC circuit. That is concept in DC, and its spurious anyway.
In AC you have 'active' and 'neutral' (which is not 'ground). The only ground is the earthing of the chassis to ground for safety. (As ignator mentioned). In transformer, there is no conduction between primary and secondary windings (unless its an autoformer) . Electricity induces magnetism which indices electricity.
So if you left the 'ground' off, you failed to make a circuit.

Ignator also mentioned " there have been schematics that show a transformer with a 6volt output winding. Your transformer does not have this (old or new)."
So what happened to that 6v line - what was it doping? I suspect it was for a6v bulb,made obsolete by some fancy LED replacement (just a guess)

hope that's useful or at least interesting

Correct. I miss said that. I was referring to 'earth' on the transformer.
The LED was a 24v bulb (very tough to find) that completes part of the circuit in the control panel. Strangely, the bulb worked when I put it back in the other day...after I ordered two new ones...lol.

 

[StephenZ]

So, good news! I JUST got it running properly. So the final things I did, ended up being:
-rebuilt the KA relay, again...
-replaced the KM1 contactor (originally thought the switch was bad, but eliminated that and traced it down to the contactor itself.)
-found a loose wire connector that was in the FR-KM2-KM1 loop.

I cannot express properly, how thankful I am to all of you on here. I have never been on a more willing and helpful forum in all my years...(not THAT many years yet, but at 45 there have been a few..lol.) Without all of your knowledge and help, I would not be in the, much more informed, position I'm in now...with a working lathe! I'm literally sitting here with my 10 year old son, explaining how rare it is to find people this willing to put in this kind of time on someone else's problems. Very cool. Thank you all!!