pimples are still here !

[jfpion]

there is less but still.....

it's where the perimeters start and end

it will be a good thing to add the start and end inside the wall instead of just on the perimeter

thnak you

[alranel]

Do they appear in G-code? It looks like you need to calibrate your retraction settings.

[jfpion]

there at the start end of the perimeters

there are here with different setting of retract from 1 to 4 mm retract length speed 20 mm/s

how to calibrate ? is there a method ?

the pb is with kissclicer same parameters there is no pimples (even in kisslicer doesn't have hoping

so it seem more there is a difference in the way to start/end the perimeter and possible improvement for slic3r

thank you

[alranel]

Do they appear in G-code?

[alranel]

https://github.com/alexrj/Slic3r/wiki/Quick-guide-to-writing-good-bug-reports

[jfpion]

no it doesn't appear on the Gcode but they are at the start stop of the perimeters

; generated by Slic3r 0.9.8 on 2013-03-04 at 15:35:09

; layer_height = 0.25 ; perimeters = 2 ; top_solid_layers = 3 ; bottom_solid_layers = 3 ; fill_density = 0.3 ; perimeter_speed = 70 ; infill_speed = 70 ; travel_speed = 130 ; scale = 1 ; nozzle_diameter = 0.5 ; filament_diameter = 3 ; extrusion_multiplier = 0.95 ; perimeters extrusion width = 0.80mm ; infill extrusion width = 0.80mm ; first layer extrusion width = 0.53mm z lift 1mm speed retract 20mm/s 2mm retract 0 extra length

look like there could be the use for a possibility to start/stop the perimeters inside like that

thank you

[alranel]

That will cause a major blob because of extrudates overlapping.

Your picture shows clear calibration problems, and you confirmed there are no toolpath problems in G-code. However since you haven't posted any G-code, any config, any STL we can't really help you... Sorry.

[jfpion]

you could have waited a bit before closing the issue i've got a very wobbly connexion i'm on the way to upload what you want

and you're wrong about blob that"s exactly what kisslicer does and there is no pimple and no blob

[jfpion]

here are the gcode: http://jean.francois.pion.free.fr/bayonet_container_slic3r.gcode and the STL http://jean.francois.pion.free.fr/bayonet_container_v1-2_20130304-15463-1560jtd-0.stl http://jean.francois.pion.free.fr/bayonet_container_v1-2_20130304-15454-1hwybv1-0.stl

And despite this little pb I think slic3r is better than kisslicer (in fact that the only point I would like to see in slic3r which is in kisslicer )

[tritol]

Same problem for me. Maybe it can be fixed with negative Extra length on restart (e.g -0.2 mm) but actual git version still generate invalid gcode as mentioned in issue #654. Should I post gcode examples there?

[alranel]

@tritol, if you think that issue is not fixed, please post your config.ini and a G-code file there so that I can check it.

[alranel]

@jfpion, a wiping move is just a non-extruding move inwards. It's different than starting the perimeter inside as in your first picture. Slic3r already does that, if you inspect the G-code closely.

[jfpion]

Le 12/03/2013 16:05, Alessandro Ranellucci a écrit :

@jfpion https://github.com/jfpion, a wiping move is just a non-extruding move inwards. It's different than starting the perimeter inside as in your first picture. Slic3r already does that, if you inspect the G-code closely.

---

Reply to this email directly or view it on GitHub https://github.com/alexrj/Slic3r/issues/1037#issuecomment-14780321.

an outward wipe mouvement after the restart of extrusion is not done and it look like that's the cause of the small pimples

I think the sequence could be position the extruder slighty inward, compensation of retractation, wipe movement outward to the start of perimeter, start print,

to avoid the ooze making a small blob

thank you

JF Pion

_ __Print "_Bonne année 2013"

IF "La santé est bonne"

ALORS " Continuer à profiter" _"Réaliser de beaux projets" Sinon "_Appeler SOS Médecins" Fin SI

While 2013 n'est pas fini "Attendre 2014" WEND

(ninos)

Des montages électroniques pour le modélisme http://jean.francois.pion.free.fr le site du vol électrique http://electrofly.free.fr/

[alranel]

Perimeters are already done starting from the inner loop, so no retraction compensation happens on the outside...

Did you try to lower your temperature? Raise your retraction speed?

Are you using a Bowden-tube printer?

[jfpion]

Le 13/03/2013 20:10, Alessandro Ranellucci a écrit :

Perimeters are already done starting from the inner loop, so no retraction compensation happens on the outside...

anyway it is something connected with the start stop of the perimeter because the repartition is totally different if I ask random start or not

Did you try to lower your temperature?

yes and the conclusion is too low is not good for the nozzle screw in the peek, the extruder push hard enough (no need to increase the démultiplication and the filament is not slipping) at the end the nozzle pop out the peek, the ptfe go out with cold abs, i had to got a new hot end (was a jhead mark5 0.5mm) so no new test for now

Raise your retraction speed?

20mm/s seems enough ?

Are you using a Bowden-tube printer?

no 3mm filament wade extruder direct feed to the hotend

what make me to think there is something to improve in the gcode is the same part sliced whith kisslicer had not these pimples

the only difference is kisslicer doesn't apply Z lift

may be the Z lift could be done with a combination of move lift AND inward to avoid this kind of pimple ?

I will try as soon as as possible the results of some try I want to do because i'm starting to think the truth is elswhere...

(i'm having some over shooting on the perimeters when printing hexagone, the overshoot is consistent on all the angles not pnly the ones aligned on x or y so as this oversoot is not in the gcode the answer could be in marlin with the built in acceleration feature. the backlash test i've done is quite good and the baclash could not explain the overshoot angles

I will print the same part with a rather slow speed for the external perimeter to see if there is difference as soon as I got an anothe jhead

JF Pion

_ __Print "_Bonne année 2013"

IF "La santé est bonne"

ALORS " Continuer à profiter" _"Réaliser de beaux projets" Sinon "_Appeler SOS Médecins" Fin SI

While 2013 n'est pas fini "Attendre 2014" WEND

(ninos)

Des montages électroniques pour le modélisme http://jean.francois.pion.free.fr le site du vol électrique http://electrofly.free.fr/

[alranel]

@jfpion, do you know Statasys patented your idea? ;-) http://fabbaloo.com/blog/2013/5/14/stratasys-solves-those-troublesome-3d-print-seams.html

[nophead]

Adrian Bowyer blogged starting in the inside years ago and I have been doing that for years also. I start an island with an infill line. You still get a seam (but not a blob) because filament has a minimum bend radius.

[alranel]

@nophead, are you able to find links to such blog posts?

I already forwarded prior art from Slic3r repository to the Electronics Frontier Foundation to help stop the patent. Anything you have about that would be so precious.

[jfpion]

If you want to use my prior intervention to stop that, i totally agree if i can do somthing else to help, please, say it

the beginning of the fame to be robbed of an idea ;-)

[nophead]

I haven't found any links yet so I have emailed Adrian.

On 24 May 2013 16:47, jfpion notifications@github.com wrote:

If you want to use my prior intervention to stop that, i totally agree if i can do somthing else to help, please, say it

the beginning of the fame to be robbed of an idea ;-)

— Reply to this email directly or view it on GitHubhttps://github.com/alexrj/Slic3r/issues/1037#issuecomment-18413039 .

[nophead]

I finally managed to get in touch with Adrian and from the date in the Java host source code I was able to find the blog post. http://blog.reprap.org/2009/07/build-quality.html

[bubnikv]

Cool, so now we have a prior art and we may experiment with the idea. Now, will this be useful? How to handle multi-perimeter prints? Will it work for inner perimeters first? Would it require a special way to plan the inner perimeters, so there is a space for the inside/outside kink after the inner perimeter is printed?

[VanessaE]

It would "seam" ( :stuck_out_tongue_closed_eyes: ) that we don't need to worry about the patent anymore: http://www.cafc.uscourts.gov/sites/default/files/opinions-orders/15-1769.Opinion.9-28-2016.1.PDF

(Short version: software patents are unconstitutional in the US, by way of the 1st amendment)

[lordofhyphens]

That's going up to SCOTUS.

"Nothing unreal exists." - Kiri-kin-tha's First Law of Metaphysics.

On Tue, Oct 4, 2016 at 6:35 PM, Vanessa Ezekowitz notifications@github.com wrote:

It would "seam" ( 😝 ) that we don't need to worry about the patent anymore: http://www.cafc.uscourts.gov/sites/default/files/opinions- orders/15-1769.Opinion.9-28-2016.1.PDF

(Short version: software patents are unconstitutional in the US, by way of the 1st amendment)

— You are receiving this because you are subscribed to this thread. Reply to this email directly, view it on GitHub https://github.com/alexrj/Slic3r/issues/1037#issuecomment-251543867, or mute the thread https://github.com/notifications/unsubscribe-auth/AAB8CsdcOlEznL7pGwpznHqdN1xP2ezoks5qwuLQgaJpZM4AefGX .