Calibration cube quality

I've been struggling for over a week trying to tune my V Minion. Followed Ellis tuning guide as well. I'm stuck on what to do next. Any tips?
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27 Replies
elco
elco2y ago
Top looks great, corners too. So I think your pa and flow are correct Because it is pla, do you have enough cooling? Are all screws on Eva tight, also the 3 bed studs?
joj
joj2y ago
Yep, everything's super tight. I even just took the whole frame apart and re-squared everything. So everything is solid and the bed height has a variance of 0.1mm. Also the fan is always 100%. I just re-printed the cube with a minimum layer time of 10 secs. Hardly improved anything.
elco
elco2y ago
Don't overtighten things though, especially the 4 screws of the rail cart That can actually deform it and cause extra play Have you tried lower temp? What's your print temp?
joj
joj2y ago
Yeah I meant the extrusions are tightly mounted together 195
elco
elco2y ago
Oh that's pretty low Have you tried higher?
joj
joj2y ago
195 looked best on the temp tower
elco
elco2y ago
For high speeds PLA wants more temp and more cooling
joj
joj2y ago
Hm maybe I'll try a higher temp
elco
elco2y ago
I don't like the superslicer temperature tower, because it is too small for high speeds
joj
joj2y ago
but to me the problem looks like inconsistent extrusions
elco
elco2y ago
Layer times are too short
joj
joj2y ago
Even on larger prints the layer lines are just terrible
elco
elco2y ago
Maybe too low temp makes you underextrude based on speed What fan do you have? 100% on a 4028 is too much maybe
joj
joj2y ago
it's a stock V minion with a 5015
elco
elco2y ago
A single 5015 is pretty weak if you want to print PLA fast. But you should be able to print a decent cube at lower speed. I would try going a bit higher temp to make it easier on the extruder
joj
joj2y ago
I printed at 215 with 15 seconds of cooling for each layer, still looks exactly the same
elco
elco2y ago
What's your line width and nozzle size? Only 2 walls? You could increase walls to slow down the layer time without slowing down print speed as much
joj
joj2y ago
0.45 width, nozzle is standard 0.4 but this doesn't seem to be a temperature problem I think it's the LGX lite just not extruding consistently
elco
elco2y ago
Did you try other filaments?
joj
joj2y ago
Yep, including a fresh spool of hatchbox PLA
joj
joj2y ago
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joj
joj2y ago
still get terrible layer lines on everything
elco
elco2y ago
That corner you see the lines being pulled out of the corner. That suggest bad layer adhesion due too low temp
joj
joj2y ago
That makes sense, but how can we explain the regular calibration cube looking the same as in the original images even when printed at 215c @ 13 mm/s?
elco
elco2y ago
No idea. Maybe try 0.5 line width too, to squish the layers together a bit more
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