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1 or 2 dedicated 120VAC circuits for my CNC?
- spumco
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3 years 11 months ago #257048
by spumco
Replied by spumco on topic 1 or 2 dedicated 120VAC circuits for my CNC?
Knowing the router helps, thanks.
The Dewalt shows a 7A load on the sticker. Assuming you run a separate 20A circuit off your wall box, that leave you with ~10A plus a little overhead.
This depends, of course, on what your 60V PSU pulls, but I think you can get away with what I suggested earlier - having a relay-controlled 120v socket on the CNC control box to power the router motor.
The result would be a very handy/tidy setup. Single power cord from CNC box to a dedicated 20A receptacle, and a receptacle on the side of the CNC box to power the router motor. It would certainly be user-friendly to have LCNC be able to turn on/off the router.
And having a separate circuit for the CNC means if you start up a table saw or some other big load that won't trip your CNC unless the offending equipment pulls your whole house main breaker down.
The Dewalt shows a 7A load on the sticker. Assuming you run a separate 20A circuit off your wall box, that leave you with ~10A plus a little overhead.
This depends, of course, on what your 60V PSU pulls, but I think you can get away with what I suggested earlier - having a relay-controlled 120v socket on the CNC control box to power the router motor.
The result would be a very handy/tidy setup. Single power cord from CNC box to a dedicated 20A receptacle, and a receptacle on the side of the CNC box to power the router motor. It would certainly be user-friendly to have LCNC be able to turn on/off the router.
And having a separate circuit for the CNC means if you start up a table saw or some other big load that won't trip your CNC unless the offending equipment pulls your whole house main breaker down.
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3 years 11 months ago #257064
by Sray69
Replied by Sray69 on topic 1 or 2 dedicated 120VAC circuits for my CNC?
I agree with everything you said. The total amps including the router (7A), 60V PSU (8A), 24V PSU (1.8A) total 16.8A. I have another small 12V PSU in my cabinet as well but I cannot find any input amps/current specs for it. I assume it is probably not much more than 1A. So that would put it at 17.8A. That seems a little tight.
Like I said in a previous comment, I have two slots open in my panel. I am thinking while I am going to the trouble of running one circuit, I might as well run the second circuit at the same time. That way I can run the router and the cabinet fan from one circuit and the rest of the CNC cabinet on the other. That way I have a lot of headroom if needed down the road.
Like I said in a previous comment, I have two slots open in my panel. I am thinking while I am going to the trouble of running one circuit, I might as well run the second circuit at the same time. That way I can run the router and the cabinet fan from one circuit and the rest of the CNC cabinet on the other. That way I have a lot of headroom if needed down the road.
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- arvidb
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3 years 11 months ago #257075
by arvidb
Replied by arvidb on topic 1 or 2 dedicated 120VAC circuits for my CNC?
Do your power supplies really draw 8 A (that would be almost a kilowatt or 16 A at 60 V) and 1.8 A (~200 W or 9 A at 24 V)? Or did you just (wrongly) add the output side current capabilities?
If the latter, the real 120 V current draw would be (60V×8A + 24V×1.8A)/120V < 4.5A (let's say 5 A including some inefficiency), or ≈12 A including the router. And that is if everything is running at max capacity.
If the latter, the real 120 V current draw would be (60V×8A + 24V×1.8A)/120V < 4.5A (let's say 5 A including some inefficiency), or ≈12 A including the router. And that is if everything is running at max capacity.
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3 years 11 months ago #257080
by Sray69
Replied by Sray69 on topic 1 or 2 dedicated 120VAC circuits for my CNC?
Here are the specs as they are listed.
60V PSU
Input voltage range AC: 85-145V
Input current: 8A
24V PSU
Input Voltage (VAC): 85 to 264
Maximum Input Current (A): 1.8
Maybe I am not reading it correctly.
60V PSU
Input voltage range AC: 85-145V
Input current: 8A
24V PSU
Input Voltage (VAC): 85 to 264
Maximum Input Current (A): 1.8
Maybe I am not reading it correctly.
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3 years 11 months ago #257081
by Sray69
Replied by Sray69 on topic 1 or 2 dedicated 120VAC circuits for my CNC?
Here are the Output specs:
60V PSU
Output voltage: +60 V
Rated Current: 20A
Current range: 0.5-20 A
24V PSU
Primary Output Voltage (VDC): 24
Output Current (A): 2.5
Maximum Output Power (W): 60
60V PSU
Output voltage: +60 V
Rated Current: 20A
Current range: 0.5-20 A
24V PSU
Primary Output Voltage (VDC): 24
Output Current (A): 2.5
Maximum Output Power (W): 60
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3 years 11 months ago #257082
by arvidb
Replied by arvidb on topic 1 or 2 dedicated 120VAC circuits for my CNC?
Then you are reading it correctly... kind of. If they only list a single input current and a wide range of input voltage like that, then I assume that the rated input current is at the lowest input voltage (i.e. worst case). So actual input current at 120V would be 85×8/120 or 5.7 A for the 60 V supply at full load.
Is there a power rating on your supplies? Or a specified max output current?
Is there a power rating on your supplies? Or a specified max output current?
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