Ultimaker Original - blobs on prints

[LePaul 321]

Well this has me puzzled

I think I have ruled out ...

The extruder (inspected/clean...no debris found)

Fans same settings on each

Filament - Used Ultimaker Silver @225C and ColorFabb Orange @ 210C

Retraction set to 4.8mm at 45 mm/sec

Nozzle is clean (atomics show a good, clean nozzle)

Note the same areas with defects. Looks like underextrusion near bottom...then left eye of the robot has some blobs.

What could it be!

[neotko 1,417]

https://ultimaker.com/en/community/23826-fine-printing?page=last#reply-161725

[LePaul 321]

Interesting thread

I was running Cura 15.04.2 for these prints and the newer Cura, with Coasting, might help.

[Torgeir 242]

Hi LePaul,

This one is interesting.. Can't help but, I do not believe this is a "random" blobs placed with this precision on two of our standard test object. No Way..

Why not try the flow test, as this will show "the error" more easy for us to investigate?

Thanks.

Torgeir

[LePaul 321]

Which flow test?

Yes, interesting that both prints in different materials present the same issue

[Torgeir 242]

Hi LePaul,

I'm thinking about this one:

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

Hmm., do not know if this is to much for a UMO, but you'll see.

This is the little single layer tube, that’s used for flow test, this blobs should make some interesting pattern in this tube.

Thanks.

Torgeir.

[gr5 2,167]

Try printing at half speed. Quality just sky rockets at 20 to 25mm/sec. And make sure ALL printin gspeeds are the same - none of this "infill faster" stuff. Fast travel speed is good but slow printing speed.

[LePaul 321]

I may even try a different nozzle....

[Torgeir 242]

Try printing at half speed.  Quality just sky rockets at 20 to 25mm/sec.  And make sure ALL printin gspeeds are the same - none of this "infill faster" stuff.  Fast travel speed is good but slow printing speed.

Hi gr5 and LePaul,

Even a better idea for sure, go for it, but don't change the nozzle -just one thing at a time..

Good Luck.

Torgeir.

[LePaul 321]

That's good advice

I'll slow it down and see how the blob situation goes.