If your Centauri Carbon 3D printer produces prints with overhang quality issues, such as voids and ripples, likely causes include loose belts, excessive print speed, high nozzle temperature, or insufficient cooling. Solutions involve tightening belts, adjusting print speed and temperature, and maximizing cooling fan speed to restore print quality.
Issue
Your Centauri Carbon 3D printer is making prints where the overhangs have quality issues after a few hundred hours of printing. Specifically, there are voids and ripples, as in the front (bow) of the Pink Benchy calibration model below.
It should look like the Black Benchy, which was printed on the same printer after the fixes below.
Causes
The printer belts may need tightening. The printer speed is too fast for the given filament type. The nozzle temp is too hot. The amount of model cooling is insufficient, causing the filament to pull upwards.
How to Fix
Tightening the belts may be all that is needed - Overview of the process is here:
Turn the printer off
-
Undo the four 2mm belt-tensioner screws on the back by one turn
Move the printhead around to all corners of the enclosure by hand
Retighten the tensioner screws
Now print the test Benchy in the included printer models, and see if it has improved quality in the bow.
If it has not improved, look at the following:
Check your fans are set to run at 100% whilst printing
Try lowering your nozzle temp - 205 instead of 210 for PLA, for example.
Reduce the print speed
You can also increase the belt tension further as follows:
Remove the screws around the back plate edges and in the middle (not the waste chute screws)
Lift the plate away from the back a bit - do not pull it too far, as there are cables at the bottom
Loosen one tensioner's screws slightly, push it towards the side, hold it there & tighten screws
Repeat for the other tensioner
Refit the back plate
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