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(RepRap en Français)
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Like many other people said, Slic3r has drawbacks, and I found it was especially with toolpaths, calculation time too long because of bugs, and slicing algorithm for some shapes.
In order to have an idea of their particularities, may I suggest you to read the slicer article of the first RepRap magazine?
by
thib88
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General
About your 1), I guess you have too much pressure in the melting chamber of the hotend, resulting in a backflow, which is normally not allowed by a hot end design, but I'm not really familiar with the one you're using. You got a backflow instead of a classical jamming
How about going back to a higher temperature in order to fluidize the PLA?
by
thib88
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General
In order to strengthen your conviction, here is a little 2 pages synthesis I made for my service, on the toxicity of ABS and PLA printing. Both printing conditions and burning cases are considered, for misuse or incidental issues . It's in french, but the google translator make a good enough translation.
by
thib88
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General
It looks like there is a calibration issue as you guessed it, wscroggins. The point here is to modify a Marlin' parameter in order to bend the curve in the right direction (you can either make it more concave or more convex).
Here is a calibration guide, search for the "flat" calibration into it, paragraph 3. The steps explained here are for a right height calibration at each column, and an curve
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thib88
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General
QuoteReprint
Will the fan cool down the print too fast?
With some parts it may cause you troubles, but in a general way, you should specify to the fan to be on only after a few layers in order to prevent warping.
QuoteReprint
Would it cool down the extruder too?
Yes, absolutely. To get more precision on the air flow, a support to mount the fan on the extruder, with a fan duct embedded is, to me,
by
thib88
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General
Pour la conduite d'aération, c'est toujours une bonne idée je trouve, j'ai eu des améliorations en ajoutant un tel systèmes quand j'imprime le PLA. Par contre ça a un petit bémol, dans le cas où la buse est un peu ventilée, ça peut perturber sa chauffe :/
Sinon pour le NEMA14, il n'y a pas vraiment de raisons que ça ne marche pas, du moment que c'est le bon courant qui est envoyé, avec le fracti
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thib88
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RepRap Groupe d'Utilisateurs Francophone
Quotedursi
!!! FULLY ASSEMBLED AND CALIBRATED.
I shall remember you some simple forum etiquette: a bunch of exclamations, and a full caps lock sentence is very agressive. It sounds like you're shouting!
That aside, may I suggest you to contact some professionals such as Stratasys or local specialized firm. What you need is a customized printer, and you have to deal directly with a company. He
by
thib88
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Developers
Well, it's laudable, but if you want an open source alternative for hosting STL files, you'll need to show your "Terms & Conditions" and "Privacy Policy", just to make sure it's not another perverted STL files website.
Edit: Copy & paste of the same post under several accounts is very noxious.
by
thib88
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Object repositories
Hello jjg,
Here are some things you didn't tested (if I read correctly your list), and that could be very easily:
Changing the CAD software. We don't know if the visualisation of the G-code is correct. Maybe the CAD software that you're using produces some meshing bugs.
Changing the USB cable. Well, you changed the PC, but have you changed the cable?
Printing directly on SD card. That will induc
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thib88
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Printing
Bonjour
Hum déjà il y a une petite erreur de maths qui fait que ta tentative de modification est ratée: 150% de 200, ça fait 300 (et puis on dit corrélation entre x et y, faut une deuxième partie quand on utilise cette notion sinon ça veut rien dire )
Mais sinon, ce coefficient multiplicateur s'applique sur le débit qui est spécifié, le "flow". Le pas par mm ne doit pas être changé, car tu perdr
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thib88
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RepRap Groupe d'Utilisateurs Francophone
Bonjour,
Ce n'est pas totalement hors sujet, car les tables à dépression sont utiles pour le prototypage rapide, pour la stratoconception entre autres. Il me semble qu'en utilisant le matériau adéquat, qui est d'ailleurs utilisé pour les tables industrielles (du moins la machine de mon école en a une comme ça), on peut avoir une table qui plaque un objet sans avoir de trous macroscopiques.
A com
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thib88
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RepRap Groupe d'Utilisateurs Francophone
Au fait, maintenant que j'y pense, tu disais ventiller fort et tôt (après la deuxième couche) afin de refroidir vite et bien ta pièce. Mais est-ce que ça ne serait pas justement la soucre du problème? J'entend par là, si le refroidissement est opéré tôt dans la fabrication, les strates de plastique vont se rectracter directement, et avant qu'une autre couche soit superposée et ajoute une contrain
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thib88
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RepRap Groupe d'Utilisateurs Francophone
Quoteianmcmill
+/-1 mm (measured with double meter stick)
First, I would advice you to use a large caliper, and if you don't have such a tool, a simple tape measure.
Second, if you look to several calibration guidelines, you'll see that they're considering the average of the rod length. Here, your length error is about 1 mm and I think unmounting your rods in order to adjust them will give you so
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thib88
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Delta Machines
On the 3mm bowden version, the total length, from top to nozzle, is around 65.6, depending on how fine you screw the heat break and the nozzle.
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thib88
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General
QuoteSrek
PLA and ABS shouldnt be much of a problem though
I believe PLA can have many problems without a proper drying. We can see in many places some advices about the storage of PLA filament, telling people to avoid humid storage places, because the PLA can mold. With that consideration, I suggest to make a very neat drying of your filament if you wash it, whatever it is.
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thib88
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General
Quotewscroggins
My motors are all wired identically. none have heat sinks on, but they are luke warm at best.
Vreihen supposed your drivers to have no heat sink too, and I can assure you that they get hot very fast without a heat sink and a fan cooling the RAMPS in some configurations.
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thib88
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Reprappers
Etrange quand même. Ta résistance chauffante, ou ta thermistance, doit avoir des problèmes de fonctionnement alors, car il n'y a aucune raison pour que tirer du pla mou ne fonctionne pas.
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thib88
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RepRap Groupe d'Utilisateurs Francophone
Well, I guess it's often a good idea to switch from cheap and maybe poor quality components to components of high quality, but maybe more expensive.
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thib88
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Printing
Ah d'accord, ayant fait quelques tests de pièces ralitevement grandes mais circulaires de type anneau, j'avais pas eu le soucis. Ca doit venir des grandes pièces angulaires qui ont de trop fortes disparité dans le refroidissement ... Tiens nous au jus si tu trouves un bon compromis. (pour le coup de la vitesse sur les endroits sensibles, j'avais aussi constaté quelque chose de similaire, et je pe
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thib88
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RepRap Groupe d'Utilisateurs Francophone
Quotemmarc67
Avec 2 petites vidéos, histoire de ne pas bouder son plaisir. Filmé à la main, avec plein d'effets normaux !
Ahah, tu fais aussi la pose de verre sur table, ou l'ouverture de porte?
Sinon pour ton problème de chaleur de la pièce, qui a tendance à faire foirer les impressions, est-ce que tu as essayé de ne pas chauffer la plaque? Vu que t'imprimes en PLA, sur du scotch papier normal
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thib88
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RepRap Groupe d'Utilisateurs Francophone
Quotekourou
salut tous,
des infos ici>>
Je ne peux qu'encourager à suivre cette procédure. Pour mes bloquages en phase de test je l'utilise et ça marche très bien.
En résumé:
On chauffe à température d'extrusion (environ 180°C à la louche quoi) On pousse manuellement le fil (de PLA) dans la buse jusqu'à ce que ça sorte un peu, pour bien emporter les débris quand on va retirer On baisse d
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thib88
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RepRap Groupe d'Utilisateurs Francophone
Quotegordonendersby
Iv just realised something else.
The part is supposed to be 70mm high.
But its come out at 53mm high.
This sounds like your Z steps aren't properly tuned, doesn't it? Since the shape is ok, but reduced in the z direction, I think there is a problem with the command of the Z axis, namely the Z steps.
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thib88
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Printing
Here are my thoughts about going on the forum rather than doing so and hiring an expert.
The point of getting someone to work directly with is having nearly no delay, while on a forum, answer can take up to several days, although they are complete and very helpful. Plus, having a direct contact with an expert is somehow different, the discussion is fluid, etc. Then, exploring a such detailed and
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thib88
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Reprappers
Belle machine en effet.
Etant actuellement sur une Delta, je suis curieux sur un point: les liaisons rotules des tubes carbone. La machine que j'ai récupérée possède des liaisons via des sphères magnétiques (type Berrybot3d, merci pour la référence, je ne savais pas d'où sortait ce type de design), mais qui se sont pas mal usées (mauvais alignement des pôles du champs magnétique je pense). Qu'as-
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thib88
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RepRap Groupe d'Utilisateurs Francophone
I wouldn't suggest anything different from MrDoctorDIV. The two issues that "long term" usage can bring on the machine are damages on the electronics or/and on the plastic parts, due to non adapted settings for theses parts.
Perhaps may I suggest things like cleaning extruder's teeth and checking idler pressure. These too are things that may have be altered with the usage of your printer, or whi
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thib88
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Printing
I have a similar problem, with a custom bowden extruder and a custom hot end. After several tests, I realized that:
you can force the hot end to extrude by increasing the flow, but we know that we should keep it at 100%,
the speed increase the quality, in the case of a too high manual flow,
if it's jammed, it will probably stay jammed because the extruder will munch the filament.
I'll do some te
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thib88
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Printing
Pour ce qui est du cold end, tu as du remarquer qu'il est divisé souvent en trois parties:
une tige filetée entre la hot end et le reste
un radiateur vissé sur la tige filetée
un tube de ptfe
Arrêtez moi si je me trompe, mais il me semble que le tube de ptfe est au dessus de la tige, dans le radiateur. La tige en elle même n'en contient pas (dans la plupart des designs que j'ai observé) car elle
by
thib88
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RepRap Groupe d'Utilisateurs Francophone
Alright, thanks for the precisions!
by
thib88
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General
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