Impossible to remove retraction defects with S3D

[dot_bob]

I have been trying to remove retraction defects from my prints in Simplify3D 4.0 without much success. The printer I am using for most of this testing is a Raise3D N2.

Using Raise3D's slicer Ideamaker I can get the printer to produce prints with no noticeable retraction defects on the skin of my prints so the printer is working properly. Trying Simplify3D with identical retraction settings that are used in Ideamaker, Simplify produces noticeable defects on the print wherever a retraction occurs.

It doesn't seem to matter if I vary coasting, wipe, extra restart distance, crossing open spaces there is still a very noticeable defect. I have attached pictures of comparison of of the prints I am achieving with the respective slicers.

Using the same settings as Ideamaker, ulitmaker's slicer Cura is able to produce satisfactory results so there is something going on with Simplify3D that makes retraction more pronounced then other slicers.

Simplify3D Retraction Seam

Ideamaker no retraction defects or seam

[dot_bob]

Comparison of settings:

Simply3D Settings #1

Simplify3D Settings #2

Idea Maker Settings

[horst.w]

Your retraction settings are not optimal but the don't cause the row surface.
Thats overextruding of material.

Take an exact messure of the filament, best done with a micrometerscrew. Set this value to menue Other.
Reduce the Multiplier 1.0 down to 0.92 up to 0.95, thats depending from the kind of filament, my actually ABS black needs only 0.91
Set your ExtrusionWidth to standard = nozzle + 20%
that will help mainly to solve your problem

Retractions
Retraction distance 1.0 mm ? only when it is a direct-extruder ok, otherwise with a bowden set it to 5 mm or more
Extra Restart set to -0.10 down to -0,15 (negative!)
Vertical lift 0.20 - 0.60
speed: I also prefer a low value, others are recommending a speed as high as possible. Find it out.
NO coast at end and
NO wipe

Good luck
regards
horst.w, GER

[dot_bob]

Thanks for the tips... The extruder is calibrated to extrude the correct length and the multiplier is correct for the type and brand of filament. The images above are mainly for reference. I have similar results on other printers as well. My point is the retraction settings in Simplify3D don't seem to have the same effect as with other slicers. I was able to tune out retraction defects and seams much better on other slicers. Night and day difference when using relatively the same setting between slicers. Perhaps it is just that other slicers that have better methods of hiding retraction defects on the surface of the print.

It's just a little frustrating purchasing Simplify3D to gain better supports, more straight forward interface, and in general improving the capabilities of the printer only to have more retraction defects on the surface then other slicers.

-Rob

[gwhite]

if you really want to delve into it, it should be possible to dig into the G-code generated by the various slicers to see what they are doing that is so different. S3D has a lot of knobs to turn, and that might give a clue as to what needs to be set & how.

I've spent many hours trying to minimize various print artifacts, with very mixed results. It seems like once I get a set of parameters behaving on a test model, it all goes out the window when I print a different model.

[dot_bob]

You need to give Ideamaker a go to see what I am talking about. It's not limited to the Raise N2, I have tried it on 7 printers so far and get the same result. Create a printer profile in Ideamaker, export the "Standard N2" preset from the Raise3D N2 profile and import it into your printer profile. Edit the profile and use your existing start and end scripts from S3D minus any S3D specific stuff and your basic retract settings then give it a shot. If your printer firmware and settings are dialed in properly you should get pretty good results.

Print a round object or something you have had problems with retraction defects in the past and you will see what I am talking about.

-Rob

[sascha79]

I use also a Raise3d N2 and had also the same problems like you.

Ideamaker is pretty nice and some work he do - in my opionion - better than S3D. For example with Ideakmaker there's no problem using supports if you do not print thin walls (viewtopic.php?f=9&t=8144)

With my current settings i notice not anymore problems with this "ugly" Rectractions. I use a Bondtech Direct Drive Extruder with Olsson Ruby.

If you download the factory file in the link above, there's my profile for my Raise3D with ABS on which you can have a look

Regards, Sascha (CH)

[lutorm]

Can the difference be whether it's printing inside-out vs outside-in? If you print the outer perimeter first and then the inner one, it should not stop and retract on the surface.

[rmimoun]

I try to solve that problem since days. All in all, the Crealty CR-10 prints beautifully, with very smooth surfaces. But no matter what I try, more or less retraction, no retraction at all between layers, distances etc, it only gets worse. The preview shows perfect lines, but the real printed object has theses flaws.

I do'nt have these problems with a very simple TronXY 802. But that's a direct drive, not bowden. Is there really nothing that can be done? Other slicers don't have these problems, and I hoped that Simplify3D would not have such flaws. The new version has exactly one new feature that is useful for me, but no real exciting stuff. It would be nice if you might at least iron out such issues.

[dkightley]

I get the feeling you're not using all the ooze settings to try and tune out the bumps you have.

Do a simple search on the forum using "Bowden" and "Retraction" and you'll find some useful information....such as this thread: viewtopic.php?f=8&t=1980&p=7648&hilit=b ... ting#p7648