Spongy wall

[unicorn1254 0]

I was in trouble with 3D printing that the contour of the printed body is not a straight line, but from dots, little lines. This is going to be done with finer designs, where it does not, it does it pretty much from the line.
The attached picture shows that the base is fine, but the wall is not good, spongy.
What could be the reason?

 

Printer: Anet A8

Program: Cure 3.3.1

 

Thanks for help

[gr5 933]

This looks like massive underextrusion.  The base is fine because you are printing slower and so the filament can keep up but cura then speeds up as you go to higher layers and also turns on the fan.  I'd say either the printer is defective or you are just printing too fast (or both).  If this was a UM2 I'd say you probably need to change the teflon coupler as it is causing too much friction.

 

I could be wrong - it would be helpful to see what this part is supposed to look like.  Is it supposed to have lots of little vertical posts?  Maybe you jsut aren't retracting enough or retrating too much.  For a printer where the feeder is on the case of the machine and there is a bowden connecting the feeder to the hot end, you want lots of retraction - like around 4mm.  for a printer where the feeder is moving with the hot end you want very little - like 1mm.  Too much or too little retraction can cause prints like this.