AM25LV mill wiring

Just before Christmas my mill blew a fuse when I stopped it as usual by opening the chuck guard. I replaced the fuse and this time it blew as soon as I started the motor.>>

Amadeal have been very helpful in suggesting a series of tests which have eliminated the motor and filter board as the likely culprits. The control board shows no signs of burnt components so I started to look elsewhere. Inside the control box on a rail on the side is a black cube which I have established is a LC1K09 mini contactor. On removing it I discovered that there was a black wire with a spade connector hanging free. This is the mains live supply. The terminal clamps on 5T3 were unscrewed so I assumed that it was that terminal the wire had come from. However on further inspection I discovered terminal 6T3 was also fully unscrewed but had nothing attached. So the question now is where should the wire connect to and was that the reason for the blown fuses?>>

I have attached a photo of the contactor and the wire inputs. Can anyone help identify what each the terminals are for or supply a wiring diagram for the AM25LV or one of its clones?

>>>>

Hi Peter,
I don't think the live mains input will connecto either 5T3 or 6T3. I think those two connection are a set of contacts that are not use when the contactor is used on single phase. (They would be used on three phase.) I cant find any schematics on line. I would NOT expect the reverse switch, the chuck guard micro and the emergency stop switch to all be connected directly to 3T2. I would expect one of them to be connected directly to 3T2 and all three othe contacts on these items to be connected in series and also in series with the stop button. The wires you mark on / off switch I would expect to be connected to the start button. I SUSPECT that the live input went to 3T2 but do not suggest trying it until you trace the wiring to the reverse switch, the chuck guard micro, the emergency stop, the stop button and the strat button,  Check if the screw in 3T2 is so loose that there would have been room for an extra wire.

Les.

Edited By Les Jones 1 on 07/01/2019 18:14:34

Les

Thanks for the comments. The Emergency switch, micro switch (chuck guard) and reversing switch are indeed in series. By on/off I meant the start/ stop buttons.

I agree that it is unlikely that the live in would go to 5T3 or 6T3 as I have confirmed that they are paired coil controlled contacts. However the live spade connector is a male and the contactor is the only device employing them and all the other terminals are done up tight. The boards both have female spade connectors on input wires. So I am at a loss as to where it should go.

The three way reversing rotary switch is barrel shaped with three terminals on each quadrant so it is proving tricky to sort out. All the inputs have crimped bullet type connections.

I am still hoping to get a wiring diagram from Amadeal.

Thanks again.

Peter

One side of the stop button should be connected to one side of the start button. I think this point will be connected to 13NO on the contactactor, I think the other side of the start button will be connected to A2 on the contactor. The other contact on the stop button will go to the last item in the chain of reverse switch, chuck guard switch emergency stop switcch. Can you check if this is the case ?
Do you think it is possible that the live feed to the contactor had not been inserted under the screw (3T2) and was just making contact with the top of the screw untill it fell out ?

One thing you could try is to connect the live feed to 3T2 via a 100 watt filiment bulb, Disconnect the wire from 4T2 and tape up the end. (This is so the motor can't start ) You could then see if the contactor would pull in and all the interlocks work. If they did then it should be OK to connect the live feed to 3T2 and re connect the motor.

Les,

I have put a photo of the wiring diagram from my manual in my photo album.

Hope it is of use to you

Colin

Colin

Brilliant thanks very much - just what I needed.

Les

You were spot on about the wiring confirmed by Colins diagram.

Tomorrow I will reconnect and test.

Thanks again to both

Peter