mach3 wont reset keeps saying external emg stop requested

[JAZZCNC]

If you decide to install a 12V supply rated at 240W instead, the maximum current it can supply rises to 20A. ALL the following results, including electricity used and waste heat stay the same. The only changes are that the supply will be physically bigger and cost more.

There is NO misunderstanding Kit we know this very well, the point was why use an oversized PSU that costs more money when not coming close to using the maximum output of the original.?
Regards your and DazP # of PSU's, which was the other point of my objection, you are still producing heat and burning electricity that isn't required. Heat is the enemy of electronics so anything that lowers it can only be good.!

. . . . Next you will all be telling people Bigger steppers are better.!

[cropwell]

. . . . Next you will all be telling people Bigger steppers are better.!

I have got a couple of Nema 17 steppers fron a 3D printer extruder bar, will these be OK if I build that steel tubed gantry mill?

[JAZZCNC]

I have got a couple of Nema 17 steppers fron a 3D printer extruder bar, will these be OK if I build that steel tubed gantry mill?

Depends on the tube wall thickness.? Anything below 0.3mm and you'll be fine...

[dazp1976]

There is NO misunderstanding Kit we know this very well, the point was why use an oversized PSU that costs more money when not coming close to using the maximum output of the original.?
Regards your and DazP # of PSU's, which was the other point of my objection, you are still producing heat and burning electricity that isn't required. Heat is the enemy of electronics so anything that lowers it can only be good.!

. . . . Next you will all be telling people Bigger steppers are better.!

Nooooooo. Bigger steppers are crap! unless you supply them with a very large voltage. Especially those 1700oz things with 8mh inductance from China. Seen a few make that mistake.

As for the PSU I don't see many of them that have failed unless they're running close to or over capacity. If the machine has car type relays in use and/or a few of them, then they may suck life out of it. If this is the case you're either replacing all the relays or going with a bigger supply (what's cheaper). (At least I only went 38w more! lol) Trace your wires and check what's in use.

[cropwell]

My point about automotive relays is that they draw a lot of current, some of them nearly 1 amp. That may damage the electronics that feed the coil. I am not concerned about PSU capacities, more than the BoB. In this case I do not know where the relay is fed from.

In fact I have spotted two of the little buggers in the photos, there may be more.