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I am having first layer adhesion to the build surface and warping problems when printing ASA.

  • I am printing in enclosed printer,
  • build surface is heated to 85 °C 15 min before prinitng (and to 110 °C when printing),
  • the bed was cleaned with isopropanol and sprayed with 3DLAC on the preheated bed right before hitting print,
  • printer has bed autoleveling and it is done before each print,
  • I've added lots of brim lines,
  • nozzle T is 255 °C and print bed T is 110 °C, no cooling fans, other settings are Idea Maker's default apart from 75 % infill density, 30 % infill overlap and 0.21 mm layer height.

I am not sure what else could I do in terms of controlling environment.

Here are some images of the print. I noticed that the first layer has gaps between filament lines. Moreover, brim is mostly not even touching the part. I think this is largely an issue with the first layer only. The parts in images were left in the printer for 1.5 hour too cool down slowly and the OK looking one is still bottom warped. I am suspecting my warping issues are due to under extrusion of the first layer. What do you recommend I try next? Printed on Raise 3D E2 on factory BuildTak build plate and sliced with Idea Maker.

My first layer flowrate is 100 % and first layer extrusion width is set to 130 %.

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agarza
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sanjihan
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2 Answers2

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Increasing initial layer flow rate from 100 % to 120 % solved the issue. Part is now stuck firmly to the build plate and also to surrounding brim. I also lowered the nozzle by 0.01 mm, but I think changing initial layer flow rate did the main thing.

Successful print

An updated question would be, how do you know if just your first layer flow rate is too low as opposed to having nozzle set too high for the whole print?

Question opened here: first layer flow rate too low or global nozzle Z distance too large?

Greenonline
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sanjihan
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Print your object in single instances at a time. Heat loss is occurring by alternating layer-by-layer between instances of the object, by staying with a single object to completion you have a better chance of preserving your heat soak. You may have the slicer option for Sequential Print/Complete Individual Objects, but since you're already having problems I feel it would be better to do the job as a single and have more control, rather introduce more factors (the effect of elapsed heated time on your bed fixative, bed temperature change for the new instance first layer) by trying Sequential Print.

I agree that the brim that you are getting is not helping the job, you can try turning off the brim and adding an oversized helper disc scaled to the same footprint to the job in the slicer, and I would further scale its height to two layers. The resulting 2 layer "manual brim" would still be fairly easy to clean off the completed part, but it would better insure that it serves the purpose that the brim is intended to serve, taking into account the gap at the brim and first layer gaps that you are seeing.

Tuill
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