VFD and power issue

All things related to the Centroid Acorn CNC Controller

Moderator: cnckeith

Post Reply
bbkengineering
Posts: 20
Joined: Sat Feb 04, 2023 5:40 pm
Acorn CNC Controller: Yes
Allin1DC CNC Controller: No
Oak CNC controller: No
CNC Control System Serial Number: none
DC3IOB: No
CNC12: Yes
CNC11: No
CPU10 or CPU7: No

VFD and power issue

Post by 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
Site Admin
Posts: 8952
Joined: Wed Mar 03, 2010 4:23 pm
Acorn CNC Controller: Yes
Allin1DC CNC Controller: Yes
Oak CNC controller: Yes
CNC Control System Serial Number: none
DC3IOB: Yes
CNC11: Yes
CPU10 or CPU7: Yes
Contact:

Re: VFD and power issue

Post by 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.
Need support? READ THIS POST first. http://centroidcncforum.com/viewtopic.php?f=60&t=1043
All Acorn Documentation is located here: viewtopic.php?f=60&t=3397
Answers to common questions: viewforum.php?f=63
and here viewforum.php?f=61
Gear we use but don't sell. https://www.centroidcnc.com/centroid_di ... _gear.html


bbkengineering
Posts: 20
Joined: Sat Feb 04, 2023 5:40 pm
Acorn CNC Controller: Yes
Allin1DC CNC Controller: No
Oak CNC controller: No
CNC Control System Serial Number: none
DC3IOB: No
CNC12: Yes
CNC11: No
CPU10 or CPU7: No

Re: VFD and power issue

Post by bbkengineering »

cnckeith wrote: Wed Apr 26, 2023 7:26 pm 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
Community Expert
Posts: 3540
Joined: Tue Mar 22, 2016 10:03 am
Acorn CNC Controller: Yes
Allin1DC CNC Controller: Yes
Oak CNC controller: Yes
CNC Control System Serial Number: 100505
100327
102696
103432
7804732B977B-0624192192
DC3IOB: No
CNC12: Yes
CNC11: No
CPU10 or CPU7: No
Location: Boston, MA
Contact:

Re: VFD and power issue

Post by 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.
Cheers,

Tom
Confidence is the feeling you have before you fully understand the situation.
I have CDO. It's like OCD, but the letters are where they should be.


bbkengineering
Posts: 20
Joined: Sat Feb 04, 2023 5:40 pm
Acorn CNC Controller: Yes
Allin1DC CNC Controller: No
Oak CNC controller: No
CNC Control System Serial Number: none
DC3IOB: No
CNC12: Yes
CNC11: No
CPU10 or CPU7: No

Re: VFD and power issue

Post by bbkengineering »

tblough wrote: Wed Apr 26, 2023 8:46 pm 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
Community Expert
Posts: 3540
Joined: Tue Mar 22, 2016 10:03 am
Acorn CNC Controller: Yes
Allin1DC CNC Controller: Yes
Oak CNC controller: Yes
CNC Control System Serial Number: 100505
100327
102696
103432
7804732B977B-0624192192
DC3IOB: No
CNC12: Yes
CNC11: No
CPU10 or CPU7: No
Location: Boston, MA
Contact:

Re: VFD and power issue

Post by 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.
Cheers,

Tom
Confidence is the feeling you have before you fully understand the situation.
I have CDO. It's like OCD, but the letters are where they should be.


ShawnM
Community Expert
Posts: 3027
Joined: Fri May 24, 2019 8:34 am
Acorn CNC Controller: Yes
Allin1DC CNC Controller: No
Oak CNC controller: No
CNC Control System Serial Number: 7804734C6498-0401191832
DC3IOB: No
CNC12: Yes
CNC11: No
CPU10 or CPU7: No
Location: Clearwater, FL

Re: VFD and power issue

Post by ShawnM »

bbkengineering wrote: Wed Apr 26, 2023 8:05 pm 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.


Post Reply