Ultimaker 2 - Printing the Ultimaker Robot

[Rahn 0]

Good afternoon all,

I just installed the olsson block to our Ultimaker 2 and attached the 0,25 nozzle.

I printed at first the ultimaker robot with normal settings (normal quality - quick settings out of cura)

The Result is the Robot on the left - i think this is very bad quality.

After this i leveled the bed once again and changed the temperature to 220°C (printing the standard grey PLA from Ultimaker)

Thickness is 0,1mm

Wall thickness is 0,5mm

Retraction is on

Infill 0,6mm

20%

Speed 20mm/s

Nozzle 0,25

First layer 0,18mm

Air Gap 100%

What do you think i can tune to get a better result, i still see some "lines" at the back.

Thanks for your help!

Best regards

[JohnFox 25]

Looks like under extrusion to me.

Wonder if that 0.25mm nozzle is too fine to be of real use, it's going to be difficult to extrude out of such a small hole. Maybe everything must be slowed down.

[Rahn 0]

I changed to the 0,6mm nozzle.

Leveled the bed once again and printed another project.

Now i see the following issue, do someone know where this comes from?

Cheers

[Labern 774]

That is way to hot for 0.25mm nozzle and 20mm/s speed. try like 185 - 190deg.

Since the nozzle is tiny, the feeder is pushing the plastic very slowly. this means it gets really hot. so you can then print heaps faster at the same temp you would normally use with a 0.4mm nozzle.