CNC Machines and power micro blips

[racerbear02]

OK, I now have the machine and as the spindle is 2.2 kw and it and all the electronics are wired in together and fed by one power supply, what sort of power UPS should I be looking at?? 3kw?? or is there any other solution? as a UPS of that power will cost a fortune.

As always, thanks in advance.

[Boyan Silyavski]

no need for UPS for the VFD. It will be extremely expensive

[racerbear02]

OK, what would you suggest??

[Boyan Silyavski]

What i said before, just the PC needs UPS, not the VFD.

[racerbear02]

Not any of the electronics with the machine need surge protection?? Is the BOB not vulnerable also?/

[Boyan Silyavski]

Not any of the electronics with the machine need surge protection?? Is the BOB not vulnerable also?/

Yeah, sorry, by PC i meant all the PC side, electronics including. Obviously whats the point protecting the PC if the BOB or drives are not protected. But at the end, depends on your budget.

[racerbear02]

OK thanks, but as the complete machine is powered by one power supply including the spindle itself I guess I would need to split off the spindle somehow and just protect the electronic parts, as I am not an electrician, or have any real understanding of electricity at all, I guess I will need to ask the manufacturer how to do that.

Thanks again

[Boyan Silyavski]

Ok, i understand- You know nothing of electricity so that's why you ask.

let me explain then: When we say power supply, means that there is a transformer that transforms and rectifies the 230V to some low voltage 5-24-70V . The BOB usually needs 5-24VDC to work. The drives need 24-70VDC to work and the VFD spindle side 230VAC, so though one cable powers the whole machine inside transformers change that 230VAC to the needed VDC. So you will need to isolate the VFD with a separate cable so you plug it directly in the 230VAC. The spindle is powered by the VFD so you need only to disconnect the VFD input from the machine and set it up with separate plug. Then You Plug the cable that powers the machine now in separate UPS. Thats all.

Now you understand? Or you still need some help. maybe you make pictures and we can help better.

[racerbear02]

OK, I really do appreciate your time here



That is what I have got, if I can isolate the actual spindle 2230v supply, I can use a 750watt UPS to protect the electronics I guess.

[Clive S]

OK thanks, but as the complete machine is powered by one power supply including the spindle itself I guess I would need to split off the spindle somehow and just protect the electronic parts, as I am not an electrician, or have any real understanding of electricity at all, I guess I will need to ask the manufacturer how to do that.

Thanks again

Do you have a schematic for the machine as that would make it very clear. If you are not happy playing with 230V then I would ask somebody local to help, better to be safe than sorry. ..Clive