Ok, so this just started about 2 weeks ago now. It only happens on longer prints (greater than 24 hours), it randomly starts.
What I mean is, the bed will be 35 for hours and then suddenly it increases by 2 degrees. I know it’s not a problem to be off by 2 degrees especially with PLA but I don’t like that it’s not keeping the set temp.
When it starts, is always random, but it’s always +2. I could be printing at 45 and the bed temp will randomly switch to 47 but the printer is set at 45. 32 would be 34 etc…
Again, it’s random and only on longer than 24 hour prints. Id say I notice it more with silks but that’s only because I print a lot of silk and most of my silk prints are also heavy on the color changes, like 3-7 colors per layer kinda deal.
Just trying to give as much detail.
I have noticed that this happens more ony .2mm nozzel but still happens with .4 and occasionally .6 but I rarely do long prints in .6
Am I being silly to be concerned over two degrees?
The temperature is always moving around a little. Quantization error will make the readout change by more than 1 sometimes. But a few degrees one way or the other means nothing. The build plate itself probably has that much or more variation across its surface.
Ignore it.
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Thanks. Sometimes its hard to tell when I should be concerned or when my OCD is kicking in.
I like what you said about the build plate probably has variations across the entire surface. That makes perfect sense. Sometimes my brain takes off and wants things to be more exact than is possible or even realistic.
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That is just the way a PID controller works. It doesn’t change the heater output. It just turns the heater on and off as necessary to maintain temp within a small range.
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@julie777 Thanks for this information. Works similarly to central heat in the home. You set a temp, and it works on keeping a threshold. It’ll heat slightly over the set temp and turn off, then it’ll let it drop slightly below set temp and turn back on. So on and so forth.
@I_Anthony , I have the same issue sometimes, it’s a difficult balance to strike, especially with something as detailed and precise as 3d printing. Thanks for asking the question.
I checked mine the past few prints and noticed that sometimes it’s higher than the set point by a degree even on very short prints < 45 minutes. So this seems perfectly normal.
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