Hi,
I’ve just assembled my new Vertex printer and already printed some objects. When trying to print small ones, there is a problem with the last layer. It seems like the previous printed structure has not cooled down and then the next layer ‘sinks’ into it. Take a look to the picture attached.
How can I improve this?
Hi,
I have the same problem, see pictures:
Top view: https://www.dropbox.com/s/9pia8kc2ggfwu1b/20151229_115448.jpg?dl=0
Bottom view: https://www.dropbox.com/s/grxfjln0uy1yi4j/20151229_115527.jpg?dl=0
Hope someone can give some tips!
Thanks,
Filip
does lookalike previous layers not cooled, id start with placement of the small forward fan, make sure theres enough air blowing on the model.
you can also bump the fan speed up in repetier.
other thing if the model is quite small try printing two at once, this will give the layer a little more time to cool.
filipPeeters - looks a bit like over extrusion, have you calibrated the feedrate of your extruder stepper motor?
I only calibrated the Z-axis. How can I calibrate the feedrate of my extruder stepper motor?
theres a lot of useful stuff on google regarding it plus youtube
the way i did it was to take the ptfe tube off and mark the filament with a sharpie (take note on what side to measure from, then manually extrude a set amount on the control panel so say (10mm) and measure to see if it has extruded the correct amount,
mine after extruding 20mm was over by 2mm, which in a long run is 10% more filament going into the print that the printer doesn’t know about resulted in really rough top surfaces and the extruder skipping on first layer(s)
i then adjusted me e/steps in the settings on printer until it was correct then saved them,
this was something i had been meaning to do for a while and has resulted in my prints being more accurate, i then create a cube and place various cutouts including holes pre set to sizes to check my vertex is printing everything the way it should be.
have noticed the travel on repetier when sliced seems to make holes roughly 0.3mm too tight but i think thats down to the slicer, so naturally make holes etc slightly larger
hope this helps
I searched on the forum about the extrusion calibration but couldn’t find something yet, so thanks a lot for your reply!!
I will check this on my printer. Did you change the E/steps parameter on the LCD screen of the printer? (Now this parameter is set on +0200.0). To what value did you change yours, so I have something to compare with?
About the too tight (small) holes, I found the next on the forum:
http://reprap.org/wiki/ArcCompensation
I changed mine to +149.00, some people reports that +148.70 is the optimum but I have better results with +149.00
Dylan
I changed the parameter to +148.7 and my print is quite perfect now! Only the first layer is not fully filled (check pics:)
Bottom view: https://www.dropbox.com/s/qtzho3wcnn982fz/Bottom%20after.jpg?dl=0
Top view: https://www.dropbox.com/s/uovtcdz9p34yhvy/Top%20after.jpg?dl=0
Something I can do to fix this?
Have you changed some other parameters in the setting menu of the printer?
You can play with the first layer extrusion parameter in your Cura settings (first page at the bottom where you can find the height (0,1mm, 0,2mm, …)
If you play with the E-steps don’t forget to use the button ‘store memory’.
Dylan
mines on about 156 atm seems pretty normal, just having issues with gaps in perimeter wall and top layer, what infill overlap are people using? only seems to be in one place its happening.
replacing all belts and refitting the iglidur bearings and pulleys in the new year so hoping that’ll clear the issue up
[quote=“FilipPeeters”]
About the too tight (small) holes, I found the next on the forum:
http://reprap.org/wiki/ArcCompensation[/quote]
Guys, if someone knows how to compensate Arc Compensation deviations in the slicer settings, then please advise? 
At the moment, I’m compensating the models for it - I have made some tests, so I have an idea of the corrections needed in my models, to get the correct hole dimensions from my Vertex.
But it would be so much better, if we’d be able to dimension correct & get the resulting hole correct… For completeness: outer dimensions are perfect, no complaints at all there.
Thanks!
