You don't mention anything about visual inspection. If you pause the video at 5:38 you can clearly see that you're under extruding while looking at the -10 test piece. There are gaps between the lines. Not only does the piece need to feel smooth but you don't want any gaps between the lines. I appreciate the video though, and I'll still give a thumbs up, but you may want to take a second look at how you're calibrating your flow rates.

@minimal3dp

7 күн бұрын

I think you are correct. I should have stressed visual inspection more.

touch is a fast way to eliminate excessively high flow rates...but...assuming you pick your choice in pass1 by touch, i recommend you re-inspect with a magnifying glass, microscope, or your mobile phone camera in macro mode+ optical zoom. what feels smooth may also actually be under-extruding. with magnification you may still find gaps and holes between the top solid lines on the one you selected purely by touch. if you do pick that for pass2, then the entire pass 2 will also have gaps (nothing in pass 2 has a higher flow rate than indicated in the profile setting) and it will be a wasted 30-60mins. you will be surprised how magnification can help, especially in pass2 when you will have 3 or 4 swatches which are indistinguishable by touch or naked eye yet magnification sees holes in three out of four of them. you do not want to have gaps in the top solid because that is a part that will never be waterproof regardless of number of solid layers. another tip is that you do not have to print all the swatches generated by the calibration tool. you can go into object manager and uncheck those you think will not be necessary. this will be useful when you come back and redo calibrations for other colors from the same material manufacturer (there is variation due to pigments). finally...true flow rate is very sensitive to print speed. whatever top solid speed you print at for the calibration, you will underextrude if you subsequently print faster, and overextrude if you print slower. the discrepancy will be very minute if the volumetric flow rate is well below your maximum (50% ish) determined in the volumetric flow rate test in Orca but severe if you are close to the limit.

@minimal3dp

Ай бұрын

Thanks for all the great info.

@oldsalty3d122

7 күн бұрын

@@suivzmoi I hadn’t thought about using magnifying glass before. I started using the magnifying feature on my iPhone and it’s made a huge difference! Thanks for that tip!

I've found that you will get better results if you choose one option higher than the smoothest on Pass 1. For instance, you chose -10 on your first pass. I would have chosen -5 if I had the same results. This is because it would put your smoothest Pass 1 result (-10) dead center in the data set. This way 0 on Pass 2 actually represents -5, and -9 on Pass 2 actually represents -14. By doing this you can see the values above and below what your smoothest result on Pass 1 was and make a more precisely informed decision. The written instructions under the OrcaSlicer tutorial actually have a short section of text that recommends doing this.

@minimal3dp

Ай бұрын

That's great advice. I will do that next time.

Great info! Thanks for sharing!

@minimal3dp

Ай бұрын

Thanks. I appreciate it.

Thanks mate always good to learn from you.

@minimal3dp

Ай бұрын

I appreciate it

Tks about your Spreadsheet

@minimal3dp

Ай бұрын

Hope you find it helpful.

hi mate just recently switched to orcaslicer and im slowly wrapping my head around it, i subd to your channel because your videos are easy to understand so i really appreciate it. ive been going through the calibration videos and all going well, one thing im struggling with is under extrusion after seams ive calibrated flow, pressure advance what else should i do?

@minimal3dp

8 күн бұрын

For under extrusion, take a look at the gap and overlap settings. Those might help. Let me know if it helps.

@skinnyguy3184

8 күн бұрын

@@minimal3dp thanks for the reply, I've just stumbled on it after fiddling around, because I'm printing wings etc at 230deg with pla+ I had to make my retraction distance 5mm from 0.6mm I guess because it's more viscose.... I guess but all is well now, man I love orcaslicer though!!!

It is possible to delete some models to save filament before printing on first pass.

@minimal3dp

Ай бұрын

I have not tried that yet but I will in the future. I appreciate the feedback.

@suivzmoi

Ай бұрын

yes you can do that in Orca. in the objects manager you simply uncheck the ones you don't need. if you did your rotation distance correctly, you probably do not need the -20. you'll know which ones you don't need after doing flow cal on system a few times.

@TomsPropertyCare

Ай бұрын

I do this now. I know that 20 and -20 especially are basically never right so they get taken off.

I have quick question, if i go on feel alone then i have noticed that there is under extrusion on the top surface, but the surface finish is the smoothest, if i pick one with correct extrusion on the top layer, then i have rough scared edges, would you pick the under extruded one and then fix the under extrusion or the one with correct extrusion and fix the edges.

@minimal3dp

7 күн бұрын

I would go with the one that looks the best. I think in my video, I did not stress visual inspection enough as a key component.

Do flow rates need to be adjusted for different nozzle sizes or is it only dependant on filament type once set?

@minimal3dp

Ай бұрын

I would do each filament and nozzle. With out testing, I believe different nozzle diameters will impact PA.

@Iisakkiik

Ай бұрын

​@@minimal3dp I've gotten ok results with pressure advance calibrated for 0.6mm nozzle, while actually using a 0.4mm, though almost certainly not as good if I properly calibrated it. Flowrate was much more off, though still usable in a pinch. Of course ymmv.

what if my best score was +5? Still doing test 2?

@minimal3dp

Ай бұрын

I would. The second pass is to dial it in 95% at pass 1, 95.xx% after pass 2.

Great video. You need to get your z-offset set perfect before doing the flow test as z-offset greatly affects the end result.

@releep78

Ай бұрын

The z offset doesn't affect this test very much, if at all. This particular calibration has a few layers of infill to reduce the effect of the z offset. If you have the z offset fade set really high, it might affect the top layer.

@minimal3dp

Ай бұрын

Thanks for the great reply.