Swiss cheese print quality issues

[clearmetal]

Hi all,
Recently I started to get some mysterious defects in print quality. Would like to get your insights and try them out to improve.
This print, I stopped in mid-print as the problems were too prominent.

1. Randomly-appearing skippy layers on the outer perimeter, which I cannot figure out as the inner perimeter and infill do not seem to skip the same layer.

2. The outer skin has these slight wiggly waves everywhere. It used to print just fine a while ago.

3. Swiss-cheese-like infill. I checked the extruder when the infill was printing to see if it stops and continues, but the white hand-turning-gear was slowly but continuously running so it's very hard to figure out what is causing it. The fact that outer/inner perimeter does not share this issue makes it difficult to assess.
It's really puzzling as some of these short-skip-within-the-layer thing is somewhat continuous between different layers.

------ added

I have Rostock V2 with E3D lite 6, 3 effector fans and stock EZextruder(calibrated).
The filament is Protoparadigm PLA yellow extruding at 200'C. Using Mattercontrol via USB(I tried SD card print and it did the same)

[Eaglezsoar]

You do not offer much in what version of printer you have, what hot end, etc but it looks like it is underextruding,( have you calibrated your EZextruder) or your nozzle is plugging intermittently.
Again, you should note what filament and the temperature. Send us some more facts about the printer and one of us will help get you going again.

[clearmetal]

Thanks Eaglezsoar,

I have Rostock V2 with E3D lite 6, 3 effector fans and stock EZextruder. Yes I have calibrated the EZextruder.
The filament is Protoparadigm PLA yellow extruding at 200'C. Using Mattercontrol via USB(I tried SD card print and it did the same)

When I just let the nozzle hang in the air and extrude a set amount from Mattercontrol the round pasta comes out flawlessly. No bubbles no skippy act of any sort.

To see if it's been underextruding I'll raise 5-10% flow rate to see if anything fixes.

[geneb]

Printing too cold, too fast, or both.

g.

[Jimustanguitar]

Mine have been coming out nicely.

[img]http://i.imgur.com/u3w6atc.jpg[/img]

[Windshadow]

strange color there Jim....did you bleach the ingredients ?

[Jimustanguitar]

strange color there Jim....did you bleach the ingredients ?

It looks that way because there's no yellow lake 5 in it

It's actually radioactive cheese.
[img]http://i.imgur.com/SdXRvxh.jpg[/img]

[Neptune]

Another, thing could be that you are applying too much Layer cooling and cooling the nozzle to the point that it clogs/unclogs/clogs/unclogs... I saw this on mine when I used the stock Layer cooling fan mount and my new E3D...the stock layer fan mount point at the nozzle too much and over cools it...try printing without any cooling and see what happens...

[Neptune]

strange color there Jim....did you bleach the ingredients ?

It looks that way because there's no yellow lake 5 in it

It's actually radioactive cheese.
[img]http://i.imgur.com/SdXRvxh.jpg[/img]

LOVE IT!

[teoman]

I had the same problem some time ago. Turned outthatthe ptfe tubeinside the stock hotend had gone bad. I replaced it and all was good in the world again (failiure was probably due to a peek fan failiure).