Thank you! Thats excellent news.
I wonder if the low power mode will just be for the initial bed heating or last longer through the printing process? I guess we will find out soon enough.
The increase in power demand is the get the heat to build up in the bed and nozzle up to temps quickly. I think i saw some power management improvements in the next firmware that you can choose longer heat up times. Might only be for the AMS heating. Why do you need a UPS? The printer should pick up where it left off.
I have tried printing identical items on my P1S and P2s. There is zero different in print times, so even if it is heating things up faster for 20 seconds or so, there is no benefit that I can detect.
I need a UPS because we get violent power surges here. The power can go on and off several times very quickly within several seconds and it has burned out some electronics. Sure, a surge protect may work, but a UPS is much better in protecting equipment from these types of events.
I am sticking to my original statement that there was no reason to have made the initial power draw 3x over the P1S. The fact that they are making firmware changes to address that make me believe they have come to that conclusions also. Ultimately, I did upgrade the UPS and found a home for the old one. I cried uncle. I donated both the printer and UPS to my nephew.
People use online UPS for this, which UPS has AC output is always from the inverter instead of connecting directly to AC mains. In this case AC input to UPS is only for charging up the UPS battery mostly.
In contrary, offline UPS which has a relay to switch from AC mains to inverter when AC mains is gone. There is a few milisec of interruption when the relay switching which could upset or crash a few electronics or appliances, like 3D printer.
So, online UPS to be used here work as a buffer and provide the extra wattage needed for printer cranking up the heated bed. This is not to overdraw more current than the UPS input is rated for and not to strip your house circuit breaker.
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Bambu has implemented a āslow heatingā option for all of the H2 series. This resolved my issues with them causing a screaming UPS when starting a print. And honestly the time if takes the bed to heat up in negligible. We need to request the same feature for the P2S now. Having multiple starting at the same time is an issue. Once they are going itās fine, but itās just the start up. I donāt need my bed heated in 6 seconds. 12-15 is just fine and makes no difference whatsoever.
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And just like that. Low-Power Mode implemented in the latest firmware.
Added Low-Power Mode for the heatbed.
Designed for users with limited power supply environments. It lowers the maximum peak power by extending the heatbedās heating time.
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I just did the firmware update and turned it on in the control panel. Iāll try and print something simple and see if there is a notable difference in time. Iāll report back.
I updated the firmware and hooked the P2S back up to my UPS. Previously I couldnāt start a print without it screaming. The draw was still high so I probably canāt start more than one at the same time. But I think I could have three printers going on a 1500 UPS now.
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I can confirm a 20% drop in power, from 1000W to 790W, with the new firmware. That still isnāt enough to stop a 650W power supply from going over current, but itās better. I already purchased a 1500W UPS before the firmware was released. It appears the wattage is lower while printing also. I think the difference in print time was under a minute for a 15 minute print. On longer prints it would be more insignificant since this mainly affects initial bed heating. I think thatās about it for this tread. Thanks all!
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