Taz 747 temperature drops 10C below target on layers above bottom layer

General
1

Hi,

I have a 747 that will print the first layer at 205 as it is set to and then eventually as it starts getting up to layers above the bottom layer it will start dropping temp. It will stay around 195 when it is set to 205. It can usualy finish prints like this but every once ina while it seems to cancel its own print because the temperature drops too low I guess.

Does anyone else have this problem?

2

In the slicer, there is a separate temp that can be set for the first layer.

3

The first layer is usually fine but it ends up dropping 10C below the 205C temperature on the rest of the layers.

It will be around 195 on the whole print has anyone else experienced this? It just seems like it does not have the wattage to keep up with the flowrate - which is the stock cura settings.

4

Again - there is a first layer temperature setting in almost every slicer:

PrusaSlicer:

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image1887×862 51.8 KB

CuraLE 3.x:

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image810×463 19.7 KB

CuraLE 4.x:

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image821×368 16.5 KB

You get the idea.

If your printer actually is trying to reach 205 and only able to maintain 195 for a while, it’s almost certainly going to give a thermal error and stop printing. Since it’s not doing that (apparently) it’s the initial vs. normal printing setting on the printing profile overriding what you have on your material profile.

5

Yes the printer is designed to print the first layer hotter - this printer is doing fine with that.

The problem is that after the first layer is printed the other layers are supposed to be at 205 and it is consistently printing at 195 - just on the edge of the thermal error like you said (and sometimes triggering it).

I have paused prints before as they are printing at 195/205 - and the extruder will heat to 205 eventually. Then when I resume the print it will lower down to 195/205 again. I don’t think that the total flowrate is too much for the heater - it is around 60mm/s stock speed.

I am trying to look into the PID settings in the menu but I am uncertain. I think there are algorithms that keep the heater from just constantly kicking on and off every millisecond - but I am not knowledgeable enough around this area.