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SoliForum - 3D Printing Community → Help/Repair/Maintenance → Wide temperature swings?
I notice that the extruder temp seems to vary a lot when printing.
I have it set to 200, and I see it go down to around 190 and up to around 205 constantly.
Is it normal for it to vary this much? When it gets down near 190, it seems to cause issues with printing, so I now have my minimum set at 203, and it gets up to around 210.
PID autotune. Search for it.
M303 S200 C5 in repetier-host's send gcode section
PID autotune. Search for it.
M303 S200 C5 in repetier-host's send gcode section
Thanks found it.
OK, Calibrated that and I have one issue with it still.
If you look at the attached picture, you can see the temperature rise to over 200 (around 205), then it heads back down to 200, but shoots back down to 190. The problem is, is that the print has already started when it crossed back over 200.
I guess one option would be to pre-heat the hot end at the temp I want, let it settle, then let it go, but I was hoping for a little more elegant way to deal with this...
Once it settles, it's right on the money though and I get much better results.
What is the brown line for? I know Red is the Hot End, Cyan is the Bed, Purple is the Target Hot End, and Blue is the Target Bed temp.
That's overshoot, you could mitigate it with some more D gain, but better just to let it stabilize first.
Brown line is hot-end average (set via tempreature menu to 2, 5, 10 min average etc).
That's overshoot, you could mitigate it with some more D gain, but better just to let it stabilize first.
You can also reduce P a bit as well, to reduce overshoot.
elmoret wrote:That's overshoot, you could mitigate it with some more D gain, but better just to let it stabilize first.
You can also reduce P a bit as well, to reduce overshoot.
Mechanical engineering high-five!
Mechanical engineering high-five!
done and done.
SoliForum - 3D Printing Community → Help/Repair/Maintenance → Wide temperature swings?
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