Small bumps/dots on the surface of prints

[lakisan]

I have a flashforge dreamer and it used to work great but last couple of days I’m having a surface quality problem. As you can see in the pictures there are lot’s of small dots going diagonally on the print surface, I tried changing the temperature, extrude width, extrusion multiplier and the retraction settings and they didn’t effect the dots. Also i tried printing straight walls in all directions and it is present in all directions, the infill doesn’t affect it and its the same on both of the extrudes with PLA and ABS. Any ides what could be causing this?

[pro3d_at]

Hi!

I’m also using a Dreamer.

Which Slicer did you use? There a many different causes for this problems.

First have a look here:

https://www.simplify3d.com/support/print-quality-troubleshooting/

It’s a pretty good guide.

Try to print a rectengular with a hight of 1 or 2 mm and no infill.

Look how is the first layer printed. Check any movement issues with the extruder and the bed. Maybe there are some vibrations while the extruder is moving.

Does it matter if you use the right or the left extruder? I had an issue while i used the right extruder with ABS an the left where also on 210° but not in use.

The left extruder where heating the object while traveling over it.

Gretting

pro3d Vienna

[NickR]

I had this issue on my creator pro and I ended up fixing it by pulling the nozzle and doing a full clean on it. At the same time I took apart the drive gear and cleaned it out. So I can’t pinpoint if it was a partial clog or if it was the drive gear being cleaned that smoothed out the extrusion but it worked.

[lakisan]

Thank you for the help but sadly it didn’t work for mi, I cleaned the nozzle and the extrude assembly and its still the same.

[lakisan]

Thank you for the reply it doesn’t work on ether of the extrudes and i made sure that the other one is cold and that it doesn’t cross the path and I cant see any vibrations or strange movements.

I printed a couple 0% infill boxes and the dot pattern is wherry consistent its the same in all orientation on the bead, its present on the infill and on the top surface. So i dont think its to do with the X,Y,Z. I didn’t change any motor DPI or voltage settings it just started doing this after siting for a weak and i made sure that its no the filament it happens with all of them.

[MVlad]

I had a similar issue and the cause of it was the actual filament.

I got some filament from a new supplier that worked very bad and created similar issues. I changed back to the filament from my old supplier, with the exact g-code (so absolutelly no modifications in the design part, process or parameters) and I got a very good print. Now I keep the “new but bad” filament only for tests and not important prints (as visual aestethics).

Don’t know if this is your problem, but try printing with a filament that you had good experience before.

[lakisan]

Thank you for the advice, but sadly its the same with all my materials.

[pro3d_at]

The sidewalls of the boxes have a regular pattern.

So it can’t be any vibration, material or something. Maybe you try another slicer software like simplify3d.

I looks like the infill is comming through the sidewall.

Did you look here?

https://www.simplify3d.com/support/print-quality-troubleshooting/

Go to the sections “Blobs and Zits” and "Lines on the Side of Print"

Greetings

[KevinO]

I have a Dreamer as well. I had this exact same problem and the only way I could resolve this was creating new printing profile. Best of luck.