32
Low layer heights have a different constraint. At or below 0.1mm layer heights, the ability of the extruded plastic
to bridge over small gaps becomes degraded due to the low flow rate. Depending on the geometry you’re making,
this can range from not an issue at all to ruining the print. In general I don’t go lower than 0.15mm layers, because
the increase in surface finish quality is not worth the additional hassle.
If you have issues with the top solid layers not bridging the sparse infill, there are a few things to try:
Increase the infill density
Increase the number of perimeters (helps more for organic objects with shallow slopes)
Drop the extrusion width to the size of the nozzle (default is nozzle size +0.05mm)
6.2.
First Layer Height
This section will describe how to diagnose an improperly set first layer height. The bed leveling procedure
described earlier in this document has yielded very consistent, ideal results in our testing, but it is not foolproof.
Symptoms of improper first layer height may include:
The part is not sticking to the bed on the first 1-3 layers (first layer is too tall)
Obvious gaps between the extrusion beads are visible (first layer is too tall)
Excess plastic is piling up between the passes of the head (first layer is too close)
Below are images that show too tall, too close, and perfect first layer heights.
Figure 36: First Layer is Too Tall
The first image shows a first layer that is too tall (the print head is too far away from the print bed). You can see
gaps between the traces of plastic that were laid down. You can also see that the infill is poorly bonded to the
outline of the object. The scrap of plastic on the outside is the priming loop that did not bond to the bed: further
evidence that that first layer is too tall.
To correct this, the bed and print head need to come closer. The corner bolts need to be turned counter-
clockwise. A first layer that is too tall to this extreme means you should stop the print, fix it, and restart the print.
The main problem a too-tall first layer will cause is that the part will not be bonded strongly to the bed, and can
detach part way through the print job.
Содержание F306 Generation I
Страница 7: ...7 4 General Info Hardware 4 1 Machine Overview Figure 5 Front View Figure 6 Side View...
Страница 8: ...8 Figure 7 Axes Layout Figure 8 Control Board Detail...
Страница 9: ...9 Figure 9 Print Head Detail Figure 10 Extruder Cold End Detail...
Страница 18: ...18 Figure 20 Filament Fed Across Hobbed Gear Figure 21 Disengaging the Idler Bar Springs...
Страница 57: ...57 In general you should be able to get within 1 of the correct flow rate with 3 trials...