CNC Machines and power micro blips

[Boyan Silyavski]

All VFD have screw terminals where they have relay contactor that switches on or off when the spindle motor is powered or not. Read the manual.

From there you take 2 wires and wire them splitting the line of the big red button saying Estop. Read the BOB manual and be careful not to split 220VAC, cause some Estop buttons have double chain, one for the small voltage signals/5-24VDC depending on the BOB/ and one for directly cutting the 220VDC power/mine for example is made like that/

[racerbear02]

Thank you yet again, I will study the manual etc when I get it

[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