Max bed temp 120C for 110V?

Bambu Lab X1 Series Bambu Lab X1C
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I have somehow missed those comments entirely by the time… :face_with_peeking_eye:

@RocketSled, you are overthinking the topic while probably lacking some basic electrical knowledge at the same time. I already have elaborated more than enough in this thread and am not going to repeat everything again around here.

Just the key points: you are (falsely) assuming that the power to the heatbed is regulated in some way. It is not. At least not actively or beyond simple physics. The heatbed is directly connected to the mains and simply switched on and off by a thyristor. When connected, it is a plain resistive load just like a hairdryer or an electric space heater. As any of those, it will consume four times the power whenever you double the voltage: twice the voltage with the same resistance results in twice the current (I = R x U), and twice the current with twice the voltage results in four times the power (P = U x I). You may try that yourself by using an EU issue hairdryer in the US or vice versa.

As not all of the rated power is consumed by the heatbed, the factor is actually not 280% but 400%. The rest goes to the electronics including the hotend heater and is the same on 110 and 220/230 V – simply because it is using low voltage regulated by the power supply.

So I would advise you to step back a little, throw your former assumptions over board and re-think everything from the beginning – then you shall see. :wink:

Oh, and regarding the recorded power consumption: the graph shown above has a sampling resolution of one second. The initial power „spike“ is not caused by switching on anything (which a purely resistive load like an electric heating element does not do anyway). It lasts exactly from the start to the end of the heatbed pre-heating cycle. The reason why you do not see 1,000 W further down the graph is that the heating cycles to maintain the bed temperatures are extremely short „bursts“, probably lasting only a small fraction of a second each, which again is below the temporal resolution of the measuring device and, hence, smoothend out in the graph.

The question „where is all that power going“ has already been answered by @lkraus:the bes heats up way faster in 220/230 V.

1 Like
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Warping or lifting of corners is usually caused by the area cooling to fast or with corners thaey are not as hot as the rest of the part and the corners start to shrink and caises the lifting. You could put the tabs on the corners of the part to get moer surfave area and help hold the corners to the bed. You could also use a washable glue to assist on holding the part down. Also make sure the parts fan is not at 100% same with the aux fan. The aux fan is really only for high speed printing. PC should not be printed at high speed.