Power Draw & UPS question

[Capt Jack]

So, after losing power 7 hours into a 15 hour print last night , I was wondering if anyone has their printer on a UPS?
If so, what watt/voltage UPS are you using? I know that the power supply is 450w, but does anyone know what the ACTUAL draw is while printing with the bed on?

Mood: Irritated.

[foshon]

The issue with a UPS won't be whether or not it can power the printer, most are able to power a computer and it's monitor. The issue is the length of time it will keep it running. Most backups are set up for large output for a short period of time, not long enough to finish a print. You would also have to power the computer that is sending the g-code unless you run off a sd card. There may even be issues with the printer seeing a power flicker when the UPS switches from AC to battery; it's very fast but not instantaneous.

[Capt Jack]

The issue with a UPS won't be whether or not it can power the printer, most are able to power a computer and it's monitor. The issue is the length of time it will keep it running. Most backups are set up for large output for a short period of time, not long enough to finish a print...

My intent isn't to keep the printer going for very long...just long enough for the power to come back on. Outages are not that uncommon by me, but they are very short. Usually less than a few seconds (more like trips/switchovers than true outages). We've lost a refridgerator and washingmachine due to these trips/surges/etc., so a good UPS with surge protection is what I was looking at. It would have saved my print last night.

[foshon]

Cool, just wanted to make sure you had realistic expectations.

[Capt Jack]

Cool, just wanted to make sure you had realistic expectations.

Unlike my wife, whom I continue to disappoint.

[kbob]

The bed is ~110W peak. The hot end is ~40W peak. The motors are maybe 50W (probably less). The electronics are negligible. So 200W is the total load. Power supply is 80% efficient (maybe), so it draws 250W. Oversize that by 50% and look for 375W, or 530 VA. (VA = watts * sqrt(2). sqrt(2) = 1.4.) Bigger is, in this case, better.

[Capt Jack]

The bed is ~110W peak. The hot end is ~40W peak. The motors are maybe 50W (probably less). The electronics are negligible. So 200W is the total load. Power supply is 80% efficient (maybe), so it draws 250W. Oversize that by 50% and look for 375W, or 530 VA. (VA = watts * sqrt(2). sqrt(2) = 1.4.) Bigger is, in this case, better.

This is exactly what I needed!
Thanks!!!