New member, Lagun Mill

[Smokie555]

I've taken on board everything above and looked around for something more suitable than my Lagun. I've been offered a Bridgeport Interact Series1 Mk2 that in in good nick but has faulty electric's. I might be able to do a deal to trade my Lagun against it and wondered had anyone converted one of these to Mach 3 and modern electric's?

[njhussey]

I've taken on board everything above and looked around for something more suitable than my Lagun. I've been offered a Bridgeport Interact Series1 Mk2 that in in good nick but has faulty electric's. I might be able to do a deal to trade my Lagun against it and wondered had anyone converted one of these to Mach 3 and modern electric's?

That's a perfect machine to drop modern electronics in.......

[Smokie555]

Well guys the Lagun is away and the Interact is in the garage. It was confusing at the start because as soon as you powered up, the spindle ran? I couldn’t stop it or control its speed as it didn’t respond to the tool call/stop etc commands. Finally I changed 2 of the supply phases around as the spindle was always turning backwards on start up and that really helped as I could now control the spindle on and off and the speed, I even managed to do some milling manually which was great.
The problem now is she keeps tripping the RCB in the garage which I swopped from a 100mA to a 300mA job but it didn’t help. Unfortunately it's not 100% consistent, but the pattern seems most often when I move the X axis but sometimes it as soon as I press the orange power enable button.
I find it odd that there’s no neutral connection on this machine and I wonder if it’s using the earth as its neutral and is this triggering the RCB? I’m running off my 5.5Kw rotary convertor and never had tripping problems with the old mill which I think had a neutral. Any idea’s

[m_c]

No neutral on 3 phase machines is perfectly normal.
Tripping a 300mA breaker would suggest there is a fault somewhere. First thing to try would be to power it up, then move/shake any wiring you can get access to, to see if that causes it to trip.
Next thing would be to gradually isolate things in turn by pulling fuses, to see if you can narrow down the fault.

[Smokie555]

Right I'll give that a try tonight, cheers

[komatias]

No neutral on 3 phase machines is perfectly normal.
Tripping a 300mA breaker would suggest there is a fault somewhere. First thing to try would be to power it up, then move/shake any wiring you can get access to, to see if that causes it to trip.
Next thing would be to gradually isolate things in turn by pulling fuses, to see if you can narrow down the fault.

Tripping an RCD means you have leakage current to ground. This could potentially be fatal so disconnect the machine and test which of the power or signal wires are shorting to the chassis. On my KRV it turned out to be the motor. Took it to be repaired and all it needed was a wash.