So can anybody help me out here. I keep on getting inconsistent results when printing out these parts. I need them to be 100% infill and I keep on getting what looks like under extrusion. I’ve messed around with the filament width in Cura and the best melting temp is 205 (well that’s what it was a few weeks ago).
I got perfect results with the same filament, same printer, same settings a couple weeks back, now this 
I just can’t seem to get the consistency right. 1 days good, next day’s bad
Your extruder might be jamming a bit. Do you hear any clicking of the extruder motor? Is there filament dust on the drive gear?
You could try increasing the temperature to the 210-220 range to see if that helps.
You can slice it differently to achieve 100% infill. But 1st does it print fine when at say 20% infill? If you use cura for instance you can set the outer shell very thick which would print solid. I use that if I want strong parts. Printing at 100% does tend to over fill the part making it messy in my experience. Maybe try Filling it 96% and seeing if that’s better.
Another one to check is the diameter of the filament, I have a roll of Esun black PLA 1.75mm that goes from 1.52 to 1.81mm and give out similar results.
Ray the extruder gear is not slipping. I have that problem on my Ultimaker but the Printrbot seems to be pretty solid as far as that is concerned. Tbh I always forget this but I have a suspicion the hot end has dirt in it as I’m having the exact same issues with another filament as well.
Michael, thanks, I’ll check that out! Never even thought about that!
Paul, this one is bang on 1.75mm well it varies slightly but balancing out the 3 measurements gives me 1.75 
Thanks for the replies guys!
Have any of you messed around with the flow rate multiplier in Cura? What’s a good place to start? 5% increments?
Why don’t you give your hotend the cold pull treatment and try again.
Doing it now
I use Cura quite a lot.
For near 100% infill I use a value of 97.5%. Any higher and you have the problem of too much infill.
I leave the flowrate modifier at 100.0 because I find that even modifying it by 0.05 has a pronounced effect on the extrusion. If E-steps is calibrated right then you don’t need to modify flowrate.
Well I’ve gone in at 96% and I cleaned the hot end. Let’s see if that helps at all
Your infill looks like under-extrusion but the internal perimeters suggest that’s not the case.
Do you have something going wrong with your filament feed path? Check from the spool to the hotend entry for inconsistent feed.
It was a dirty hot end it seems. Printing fine now and the suggestion to print out at 96% infill seems to have worked as well! Thanks for all the suggestions!
Oooooh post a pic of a fixed piece!
Once your print head reaches your set temperature, try extruding for ~3seconds, before printing.
Check extruder spring tension.
+Tony Bostony
So this was an previously unsuccessful print, the power went down half way through the print but this is how I want it printed out.
Here’s a pic of a print that’s just come off that was successful
I probably could look at the retraction settings but I clean the prints with a knife after they done.
So it looks like it was the extruder tensioner. Tightened it up and it all appears good…thanks Jason!
so many things, so many things!
