Marvin issues printrbot simple metal

[paonia]

I am printing on a printrbot simple metal. Here are a few pictures. It looks like the handle is wrong. What else is off. Ideas for fixing issues would be great

[RCole]

Can you give us a little more information? What material. What are your temperature settings? Print speed? Extrusion at 100%?

[paonia]

Pla matchbox blue

190 degrees

flow % 100

print speed 20 mm/s

travel speed 35

bottom layer speed 10

Happy to provide any other numbers you need.

I am using Cura

Thank you

Paonia

[paonia]

Ok here is the next round of Marvins

Retraction was on.
1. slow 190degrees
2. faster 190degrees
3. faster 195degrees
4. faster 185degress

Including a screen shot of the cura settings

[chunkysteveo]

In Advance tab under Cool - change your Minimum layer time from 5 to 15.

The top hoop looks like it’s melting on each additional layer as the plastic is not getting enough time between each layer to cool down. The body of Marvin is larger per layer so the plastic naturally gets time to cool and “set”. The hoop is so small that each layer takes 5 seconds tops to do and the next layer is applied to a “still warm” layer. Each additional layer will just compound the issue as it goes. I had the same issue with my first Marvin and settings the minimum time to 15 made a huge difference. Better cooling will also help - I had issues with warping due to lack of cooling of the plastic as my part fan couldn’t get round from the back of Marvin to his front.

If you print the low-poly pikachu on Thingiverse with 0% in-fill and 5 seconds minimum layer time you will (hopefully) come into the same issue - it will print perfectly till it gets to the last ear and they will stay warm and ooze and melt into drippy blob! I never came into this issue till I printed Marvin as all my other tests and models tended to be quite bigger and layer times were always naturally long and so the plastic (PLA) had time to cool.

Post your results with the increased minimum time.

Steve

[paonia]

Here is my latest attempt. I installed a new fan today and it seems to have fixed most of the issue.

Thank you all for your help

[chunkysteveo]

Ahh great stuff! The pics are out of focus, but we can see the improved sharpness and quality of the print. Well done!