Ultimaker V2 hot end DIY kit not fully sealing bottom and top layers… I have my bed leveled (checked many times) with only enough gap to pass a single piece of paper under across 4 corners and my filament feeder tension spring tightened less than 11mm (tight!)… Here are my current Cura profile settings:
Current Cura 13.06.4 profile on a Windows 7 64bit machine:
Layer height .1mm
Shell thickness 1.6mm
Bottom/top thickness 1.6mm
Fill density 25%
Print speed 110mm/s
Print temp 210c
Using brim
Filament diameter 2.85mm Ultimachine PLA
Flow 100%
Nozzle size .4mm
Retraction speed 40mm/s
Retraction distance 4.5mm
Initial layer thickness .3mm
Travel speed 150mm/s
Bottom layer speed 20mm/s
Infill speed 110mm/s
Minimal layer cool time 5sec
Fan on 100%
Do I need more flow or what?
210 seems a little hot for PLA.
210 on the profile; ~200 at the nozzle
Pardon the stock questions:
-Tried a slight increase in feedrate?
-Do you see the same problem with solid infill?
-Confirmed the diameter of the filament is correct?
No mod to feedrate yet, I have been looking for any other efficiencies before bumping it
Solid print (small) does not show the issue by there again it was a small print
Diameter is right on and constant within the filament (Ultimachine)
You think I should just start hitting the feedrate up?
Well, it might be worth a try. My default approach to calibrating feedrates as follows:
Print a solid calibration cube, let it do 25% of the layers (to account for any layer squishing from the bed) and then start bumping up the feedrate till the gaps go. Then do a ‘precision’ calibration object to make sure things still fit together as they should.
This assumes the problem is feedrate. If your Z steps/mm is a little high, you could see a similar issue. Is everything dimensionally correct? If you bump the feedrate and things are the right size still then you should be laughing.
Is 2.85 REALLY the diameter? Also use the latest software: http://software.ultimaker.com/Cura_closed_beta/ Ok just saw your answer above, could it possible be belt tension/back lash?
Good suggestions above. You could fudge by outing in a slightly smaller filament size. Be sure to measure your filament in multiple places and directions- average the results.
Be sure your E steps/mm is dead on.
Only other thought is a slightly clogged tip but you would eventually see other symptoms.
Single wall top would show the problem more than a double or triple wall.
In the end, it’s not enough extrusion. adjusting it for more may cause other problems, so a just a little at a time.
Brook
I don’t have any binding on my X/Y and believe the belt tension is correct sounding when I thump it (after watching the tuning video). I went to re-align all belts again and found that when moderately tugging on end pulleys the rod is sliding through the bearing caps ~1mm… I was just about to print 4: http://www.thingiverse.com/thing:54075 in an attempt to lock down the X and Y bars. Any one have this issue? I’m not sure it is the end-all answer here but I will give them a chance regardless unless someone has had bad experiences with the bolt binding the rod play…
@Luis_E_Rodriguez Yup, this blue PLA from Ultimachine is averaging @ 2.85. Also, 13.06.4 is the latest stable release for Cura on Windows: http://software.ultimaker.com/ ; I see that 13.06.5 is at GA for Mac and Linux. Are you successfully running a higher Cura on Windows?
What’s your “Bottom/top thickness” setting on Cura? If 0, Ultimaker won’t fill the top/bottom layers. It might be helpful if you increase it to 0.4 or 0.8 (same as shell thickness).
@Soichiro_Tsuda
Bottom/top thickness 1.6mm
Shell thickness 1.6mm
I have been adding and adding at multiples of the nozzle size (.4) per forum warnings.
@Tim_Rastall , at current settings everything comes out correctly sized and I have printed parts that slot together. I guess I just need to break down and start up-ing feedrate already. I had hoped that at 150mm/s, 100% feedrate and accurate filament diameter would return proper finishing but such is the process I guess.
Hmm: http://www.thingiverse.com/thing:99182 anyone used this on their Ultimaker yet??
I’m not familiar with ultimaker settings so I can’t help much. To me, it seems like your widths/height ratio is bugged. Try rendering that pig in Slic3r and try again. I haven’t had great luck with Cura.
I do believe there is an top+bottom infill bug in that version of Cura and that if you look closely at the nozzle as it moves, you will see that it draws the lines too far apart for the rectilinear infill. Try concentric infill or some other types of infill for the top+bottom instead and see if that does the trick for you.
