VFD and power issue

[bbkengineering]

Hi everyone,

I am building a cnc router with the acorn and clear path for my capstone mechanical engineering project and I needed some help.

I currently have this spindle ( https://www.vevor.ca/spindle-motor-c_10 ... 6e9a90de.8 ) and this VFD (https://www.vevor.ca/variable-frequency ... e9a90de.11 ).

My issue is that I set up my entire system based in 120v. So my question is, can I have one outlet for my control box which has the power supplies for the acorn, motors, etc. and a separate 220V outlet for my VFD. My concern is that the VFD still needs to run through my e-stop contactor (which is 120V coil) and it has to have connections to acorn and relay. I know this VFD has isolated Analog inputs.

I know this isn’t the best solution but I have to present my project in 2 weeks and can come up with something more efficient later.

Any help is greatly appreciated.

[cnckeith]

yes we do that all the time.

it is good practice to have one disconnect when opening the cabinet so it disconnects both the 110 and 220 when the door is opened on the cabinet. this is the way we do it.

[bbkengineering]

yes we do that all the time.

it is good practice to have one disconnect when opening the cabinet so it disconnects both the 110 and 220 when the door is opened on the cabinet. this is the way we do it.

Are there significant changes that i would need to make to make the whole panel run off of 220V single phase?

[tblough]

The easiest solution would be to run a 4-wire 220V service: 2-hots, 1-neutral, and 1-ground. Then hot-to-hot is 220V, either hot to neutral is 120V.

If you don't have access to a neutral, you can run a 3-wire service and add a 220-120V control transformer to your cabinet.

The question is do you really need 120V? Most computer power supplies and the Acorn supply are multi-voltage and can run at 220V. Just change your contactor to a 24VDC coil.

[bbkengineering]

The easiest solution would be to run a 4-wire 220V service: 2-hots, 1-neutral, and 1-ground. Then hot-to-hot is 220V, either hot to neutral is 120V.

If you don't have access to a neutral, you can run a 3-wire service and add a 220-120V control transformer to your cabinet.

The question is do you really need 120V? Most computer power supplies and the Acorn supply are multi-voltage and can run at 220V. Just change your contactor to a 24VDC coil.

I only have these breakers which are single pole, would they work? https://www.automationdirect.com/adc/sh ... gmcb-1d-10

[tblough]

Those will work for your 120V stuff, but you need a double-pole breaker for 220V. Since 220 is two hots, both need to be shut off at the same time.

[ShawnM]

Are there significant changes that i would need to make to make the whole panel run off of 220V single phase?

Nope, as Tom mentioned run a 4 conductor cable into the machine and this will give you both voltages, if you need them. A note worth mentioning thought is that everything will run off 220. The computer, monitor, Acorn power supplies and your VFD and spindle. This is how I wire machines for my self and customers. It will simplify the wiring and of course run more efficiently at 220. Do get 2 pole breakers for for those components using 220.