Weird Infill Issue

[gamerfanatic 1]

Hey guys, this is my first issue with my new 3d printer! I love it anyway :Pbut wish to figure out what I need to adjust to get it working even better!

The infill does not seem to be "connecting" see pictures below for the issue. It seems like the printhead is moving REALLY fast during the infill parts so the "flow" seems to be too slow to keep up with the fast print head? Not sure!

(20 or 25% infill)

Anything I should adjust?

Thanks!!

Aaron

Edited May 9, 2015 by Guest

[Labern 774]

HI

In Cura you need to go to expert, full settings, then go to the advanced tab and you will see infill speed. Slow this down. 10mm/s (or close to it) above the print speed is good. to fast and you get problems like yours.

you can even out all the speeds so they don't vary to much between each other.

Example:

50mm/s outer shell

55mm/s inner shell

60mm/s infill

50mm/s top bottom

[gamerfanatic 1]

HI

In Cura you need to go to expert, full settings, then go to the advanced tab and you will see infill speed. Slow this down. 10mm/s (or close to it) above the print speed is good. to fast and you get problems like yours.

you can even out all the speeds so they don't vary to much between each other.

Example:

50mm/s outer shell

55mm/s inner shell

60mm/s infill

50mm/s top bottom

This is what I thought I would be able to do. Is there no other way to compensate for more flow? After exploring the settings the speed only seemed to be around 100ish mm/s so the printer should definitely be able to handle that, no?

[Labern 774]

Yes it can handle it. but its the difference in speed that's a problem. the faster you go the hotter the nozzle temp needs to be. So you will need to increase the temp. this will fix the infill but make the slower areas a bit hot.

[gamerfanatic 1]

Yes it can handle it. but its the difference in speed that's a problem. the faster you go the hotter the nozzle temp needs to be. So you will need to increase the temp. this will fix the infill but make the slower areas a bit hot.

+rep if I could! Thank you!

[gamerfanatic 1]

I am feeling a little more comfortable around this machine, which I am happy to say. However, I still have this issue on ANY infill I am doing. Either high percentage or low infill, it still is not making a complete infill structure like it should. Any ideas? All my infill looks like the print attatched in the OP.

(I've increased temps to 217C with same results)

[Labern 774]

Have you reduced the infill Speed?

[Labern 774]

Set all speeds to 50mm/s (except initial layer) and see if it's ok, then adjust speeds from there until you get the results you want

[gamerfanatic 1]

Set all speeds to 50mm/s (except initial layer) and see if it's ok, then adjust speeds from there until you get the results you want

Is there no way to correct this without adjusting speeds? I should be able to print at 80ish mm/s infill with this printer. Even on larger (square) prints it does the same type of things. I have reduced it to 60ish but it still will not finish it well.

(ultimaker 2)

Edited May 16, 2015 by Guest

[gamerfanatic 1]

It seems like anything too fast just has too little material, do I need to increase material flow?

[gamerfanatic 1]

It seems like anything too fast just has too little material, do I need to increase material flow?

When bridging, the first "attempt" at bridging the material fails to extrude out of the nozzle until the second sweep around but by then the "infill bridge" has no where to be placed on.

Edited May 16, 2015 by Guest

[Labern 774]

Sounds like you have under extrusion issues over certain Temps

[Labern 774]

Speeds I mean

[gamerfanatic 1]

Sounds like you have under extrusion issues over certain Speeds

Yea, I think that is definitely the issue. How would we be able to fix this?

Here's the latest print, I think it is definatel evident not only on the "bridging" portion but on the layer that all of it sits, on, holes ETC. (Note this was printed at 100mm/sec, but i think it is definitely doable)

Sorry for the upside down image. Thanks Apple.

Settings:

*Extruder temp: 215C*

*Bed Temp: 50C*

*Ultimaker Silver PLA*

---------------------

Quality:

Layer Height: 0.1mm

Shell: 0.8mm

Retraction: Enabled

---------------------

Fill:

Bottom/Top Thickness: 0.6mm

Fill: 33%

---------------------

Speed

Print speed: 100mm/s

---------------------

Support:

None

---------------------

Machine:

Nozzle: 0.4mm

---------------------

Quality

Initial layer: 0.3mm

Initial layer line width: 100%

Cutoff object bottom: 0mm

Dual extrusion overlap: 0.15mm

---------------------

Speed:

Travel speed: 150mm/s

Bottom layer speed: 20mm/s

Infill speed: 100mm/s

Top/bottom speed: 0mm/s (100mm/s)

Outer shell speed: 75mm/s

Inner shell speed: 0mm/s (100mm/s)

---------------------

Cool:

Minimal layer time: 5 sec

Fans: Enabled 100%

Edited May 16, 2015 by Guest

[Labern 774]

you definitely need to go hotter at those speeds. like 220 or 225.

I would try this speed test first. just load the Gcode onto the sd card and print it at 230deg

https://ultimaker.com/en/community/view/5586-can-your-um2-printer-achieve-10mm3-s-test-it-here

this will show up if you have a problem. if it prints fine then its your settings that you need to adjust.

[gamerfanatic 1]

you definitely need to go hotter at those speeds. like 220 or 225.

I would try this speed test first. just load the Gcode onto the sd card and print it at 230deg

https://ultimaker.com/en/community/view/5586-can-your-um2-printer-achieve-10mm3-s-test-it-here

this will show up if you have a problem. if it prints fine then its your settings that you need to adjust.

Can't seem to find the download link...

[Labern 774]

https://www.youmagine.com/designs/test-print-for-ultimaker--2

[gamerfanatic 1]

That was crazy watching. Love it. 10mm^3/sec got a little hairy but as you can see it came out alright!

What now?

I should note, the back wheel that feeds the material into the tube seemed to "back click" every so often, much more at 8+ mm^3/sec. I was only printing at 4.0mm^3/sec on the print i posted above (with fill and bridging issues)

Edited May 16, 2015 by Guest

[Labern 774]

You have been printing to cold then and need to up your Temps.

There maybe something that causing it to click back. You may need to do an Atomic pull to clean the nozzle. I would recommend printing Roberts feeder.

But the test came out fine so try printing your earlier piece at 225 and see how it goes. Then fine tune from there.

[gamerfanatic 1]

You have been printing to cold then and need to up your Temps.

There maybe something that causing it to click back. You may need to do an Atomic pull to clean the nozzle. I would recommend printing Roberts feeder.

But the test came out fine so try printing your earlier piece at 225 and see how it goes. Then fine tune from there.

I will print Robert's feeder. I actually like the design a lot more than the new one (more open).

[nicholasnooch 0]

Hello printer peeps,

I have an issue with this sparse printing. I tried to set up my settings to match gamerfanatic's settings but my prints cant even get to 4 mm 3/s. I am using pla at 230 c.

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The directions say to open the gcode then save it to sd card. Cura will let me open the premade gcode but not save it.

I could really use some help with this as i have two of these machines and just a bunch of spaghetti. Thank you very much for your time.

[Labern 774]

you don't open the gcode in cura, just save it directly to the SD card.

Its hard to see in your photo but it looks like your bowden tube isn't fully down into the white PTFE coupler.

New machines?

[nicholasnooch 0]

you don't open the gcode in cura, just save it directly to the SD card.

Its hard to see in your photo but it looks like your bowden tube isn't fully down into the white PTFE coupler.

New machines?

 

I thought that might have been the case so I made sure to check it but it seems to be in there all the way. I just double checked. It goes in about 4.5 mm, if you measure from the little mark that the clamping down makes.

I just got two of these machine to replace a dead makerbot replicator 2 but these two new ones wont get up to par just yet. Sadly I have one makerbot rep 2 and one ulti one making all the prints and two new ultimaker 2's that are sitting. the nozzles are pretty clean and steams of filament seem to come out fine at lower speeds. I don't think I can go too high without carbonizing the filament.