How to print Coral Cuff from Thingiverse?

[kazzaqov 0]

Has anyone fine-printed the coral cuffs from thingiverse? (http://www.thingiverse.com/thing:88849)

I just cant get to print one. It comes out all blobbed and with lots of strings (no matter what retraction settings are)

Can you please share your Cura settings?

 

[gr5 2,071]

To reduce stringing look at the first picture:

http://umforum.ultimaker.com/index.php?/topic/1872-some-calibration-photographs/

Every filament is different so I recommend you do the same test i did at different temperatures.

I have retraction amount at 4.5mm which is cura default and is the perfect amount. I also have one of these:

http://www.thingiverse.com/thing:46157

If you retract too much you will get air in your nozzle followed by blobbing.

 

[gr5 2,071]

Some filaments are better than others. Some filaments you can just lower the temperature and they won't string at all. Other filmanets - no matter how low the temperature it will make strings - but the lower the temp - the thinner the strings - until they are as thin as a spider web silk string and they are easy to remove afterwards.

Can you repost your picture in the ultimaker forums? USually I can click on your pictures to see larger version but not this one.

On the top left corner click on "gallery" then upload your picture to a gallery. Then make a posting and click on "my media" to insert the picture into your posting.

 

[kazzaqov 0]

Here is the photo.

 

[gr5 2,071]

Oh wow! Something is seriously wrong. You appear to be over extruding by about 2X. Have you printed other objects? There are many things that can cause this:

Z axis is moving wrong amount by factor of 2X. You can test this by moving the Z axis 10mm and see if it indeed moves 10mm. This is a probablem that came up recently (there was a bad jumper on the board).

Extruder calibrated wrong by 2X. Same sort of test. Pull the filament OUT of the print head (with the head hot) until only a few centimeters are in the bowden tube. Mark the filament below the feeder with a pen. Tell the extruder to extrude 10mm. See if the mark moves 10mm.

Cura calibrated wrong - In Cura is your nozzle set to .4mm?

 

[gr5 2,071]

I would try printing a 10mmX10mmX10mm cube first.

Also it's possible there is something wrong with your fan. Is it on? Is it blowing on the part (or sucking?)?

 

[gr5 2,071]

Another thought: The old Cura has a setting "Extra length on start". Make sure that is zero!

 

[kazzaqov 0]

gr5, I can print other objects fine and everything seems to be calibrated. I think this model has too thin walls. Maybe something wrongs with the fan, but I dont think its that critical. It is blowing. Reducing its speed usually helps to get rid of under extrusion.

 

[spooner777 0]

That Coral thing looks very hard to print anyway...