Nearly crashed my denford triac machine and not sure what went wrong, help please?

[JAZZCNC]

As for an update on what happened I was stood right in front of the mill it started to go south and before I got to hit the E Stop the electric supply tripped and I was in the dark.

That's pretty big detail you left out there Suesi sue.!! If you don't give all the details then it makes helping very difficult.!

When the Machine went wrong did the Spindle jam.? Being a DC motor this is about the only thing that would possibly hit the breaker hard as the converter ramps up the amps to try and maintain speed. Steppers would just stall and trip the drive rather than mains elecy.

Still doesn't explain why it went Awol but would explain the trip.!

[magicniner]

"Plugged in" or "Wired in"? And with what cable running to the shop?
If your machine can draw enough current to throw the breaker is it possible that you're getting mains voltage drop in your shop when the mill is running?
Ideally you should have a breaker on the wall which will trip before the mill can throw the supply breaker,

Regards,
Nick

[suesi34e]

Hi Nick,
Thank you for your msg. What I have is a two way socket in a shed in that has a plug in circuit breaker, from there I have approximately 70 meters of 1.5mm 3 core cable to a container where I have my machine plugged in just the normal 3 pin plug. I only have one machine in the container so I am not running lathes, saws or any other machines just the mill. I used the circuit breaker in hope it would help protect my mill.
Many thanks
Suesi