mach3 wont reset keeps saying external emg stop requested

[Geoff57]

morning all
on the two psu s there is a green led on the larger unit it is lit up on the smaller unit it is not, does this mean the unit is dead ?
thanks Geoff

[Clive S]

morning all
on the two psu s there is a green led on the larger unit it is lit up on the smaller unit it is not, does this mean the unit is dead ?
thanks Geoff

Geoff. Do you have a DVM ? a meter to test the voltage AC and DC . If so can you check what voltage you are getting from each PSU on the DC terminals.

The smaller PSU should be putting out about 12-24V if it is not doing so then you need to check if it is getting 230V AC on the input. There may be a loose connection or a fuse blown.

[Geoff57]

hi Clive
yes i have dvm i assume L N are 240 volt but how do i check the v- v+ do i put the black probe on v- and red on v+ sorry im not up on electronics
thanks Geoff

[JAZZCNC]

hi Clive
yes i have dvm i assume L N are 240 volt but how do i check the v- v+ do i put the black probe on v- and red on v+ sorry im not up on electronics
thanks Geoff

Yes Geoff black on V- Red on V+ but you'll need to change the meter from reading AC to DC.

[Clive S]

hi Clive
yes i have dvm i assume L N are 240 volt but how do i check the v- v+ do i put the black probe on v- and red on v+ sorry im not up on electronics
thanks Geoff

Yes. If you get them the wrong way round it will just measure -ve. make sure the meter is set to DC and AC for the mains side. Be careful .

Edit: I had not refreshed by browser so didn't see Jazz post.. Just to make sure that there is not a short on the output make a good pic. and remove all the wires on the DC side and check again.

[JAZZCNC]

morning all
on the two psu s there is a green led on the larger unit it is lit up on the smaller unit it is not, does this mean the unit is dead ?
thanks Geoff

Ok, then you have found the source of your problem. If the small PSU as a fuse checks this, also check wires are not loose(do this with power off). If not fuse or wires then it's dead.
To replace you will need to find what power output it was giving you. The BOB will take between 12-24Vdc but it could also have been powering things like relays so it's important to know the output and replace with the same size. Looking at the relays in the box I'd guess it's 12Vdc because they look like Automotive relays which will be 12Vdc.