Major Infill Issues

Hello,

I have been trying to get my infill correct for a few days now, and all I can manage isa few good layers and then it bubbles up and messes up!

I have tried altering:

Layer Height
Hot-End Temp.
Infill %
Infill Speed
Extruder steps/mm

I have attached images of some of the test cubes i have tried to print.

does anyone have any tips on how to solve this?

Its annoying when you see people on YouTube get their 2nd and 3rd prints to be perfect with the infill.

Thanks.

Edited 1 time(s). Last edit at 12/28/2013 05:33AM by ayouden.

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NFireLabs - The World First Modular 3D Printer - At An Affordable Price!

Try calibrating your extruder Steps value, i.e tell the printer to feed at least 50mm of filament, and measure and confirm its doing that amount.

Also try checking you slicer settings for filament size, nozzle size and flow rate correction

Roger is right. Also when you extrude into open air does it come out nice and even like a thin string or are there blobs and varying thickness? If so your filament may be to blame, it may me contaminated with moisture (PLA soaks up moisture in the air) or it could just be cheap filament (like from China) that won't work. But if it extrudes nice and even then it's probably calibration.

I agree lots with these guys, at .35mm nozzle and 3mm filament you'll need to be much more accurate than most with this number. Also check your thermistor settings in firmware. If you, in any way, can get access to an infrared gun check your hotend temp. There are several things that could prevent the value being shown in the host from being the actual temp.

Quote
SamS
If you, in any way, can get access to an infrared gun check your hotend temp.

I tried this recently and it was very inaccurate :-( because the hot end is metal and normally too reflective for the IR gun to measure accurately.
The only reliable way to measure the temperature is with a good thermocouple based meter and firmly tape the termocouple to the hot end.

Hey,

thank you for you suggestions, I have used a thermometer to measure the the temp of the hot-end, and sure enough, it was 10*C below what it should have been.

As for the extruder, I asked it to extrude 10mm, and it extruded 15mm! So i have altered that setting also.

However, I have just tried to print the same 2cm cube again, and the results are identical to that before the setting change. (attached Image)

I really am lost now!

thanks.

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NFireLabs - The World First Modular 3D Printer - At An Affordable Price!

Hey, turns out I am the biggest lemon known to man!

My filament is 1.75mm rather than 3mm....

I will update with latest print when it is done.

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NFireLabs - The World First Modular 3D Printer - At An Affordable Price!

It looks like the prints have blobs on them, a sign that the temp is too high. What temp are you extruding at? You can try the advanced settings in Slic3r, set infill to 110% and keep going up from there, until you get what you expect. Do your other calibration peices look ok?

a huge thank you to everyone who has helped me get this correct.

I am now printing flawless infill, and the results are surprising me!

thanks, ayouden