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(RepRap en Français)
Re: courroie foldarap - 5 years ago
Comme dit en MP Si la GT2 (pas de 2mm, dents arrondies) ne s'emboite pas parfaitement avec la poulie existante alors il s'agit d'une courroie T2.5 (pas de 2.5mm, dents trapézoïdales), j'utilisais ce dernier type pendant longtemps.by Emmanuel - FoldaRap
Re: Alternative to the Minitronics board - 5 years ago
Any board could be used, as the configuration is quite standard/common (4 axis, 1 hotend, 1 bed, etc...) But fortunately the Minitronics 1.1 was discontinued because they are replacing it by the 2.0 so we can continue to use the same board / form factorby Emmanuel - FoldaRap
Re: Liste du matériel - Minitronics, Alimentation et Moteurs - 5 years ago
J'ai eu également peur de voir la production des cartes Minitronics 1.1 s'arrêter, mais heureusement c'était pour la remplacer par une version 2 Coté moteurs, il faut simplement qu'ils aient le format adéquat (nema 14 ou 17 selon pièce et version) et un minimum de couple selon l'axe à déplacer (environ 1.5kg.Nm pour le XY, 4 pour le Z et ne pas trop chauffer, et 2-4 pour l'extrudeur selon l'effby Emmanuel - FoldaRap
Re: 30mm blower VS 30mm fans - 6 years ago
Since the modification, the experience seems better overall. More specifically, I printed this, a geometry with small cross sections that was especially tricky before at small scale. Or I would have to print several parts at the same time to let them cool and avoid the thermal build-up :by Emmanuel - FoldaRap
Re: Rack & pinion - 6 years ago
Same as with belts. The speed limit is reached either from : not enough motor's torque acceleration (too high) step rate generation (at 1/32 microstepping, a 8 bit cpu will quickly have problems following the "consumption" of step pulses) That said, I print at 30 or 60mm/s (small or big objects), usually 40mm/s Beside XY movement speed, the printing speed mean nothing, the important factor isby Emmanuel - FoldaRap
Re: 30mm blower VS 30mm fans - 6 years ago
Ok, so as planned : Blower (CFM 1,4 or 0.039m3 /min) Two fans (CFM 3,18 or 0,09 m³/min each) With 454% more CFM the result is not 454% better, but at least a little more Especially the fourth step is more consistent. I will make other tests, to see not only on bridging but also were the plastic would typically goes up (small surfaces + heat build-up). There is also a probable way to improvby Emmanuel - FoldaRap
Re: 30mm blower VS 30mm fans - 6 years ago
Looks good ^^ (too bad, they need to be mounted the other way) For my test I have two "UDQFH2H08" that are almost as good as the reference in the first post. Relevent specs : *CFM 3,18 or 0,09 m³/min *static pressure 33 Pa *dB 19 *speed 8600 tr/min By comparison the fan used in the e3D hotend (this kind) is 30dB / 10k RPM / 4,08 CFM (quite noisy), for future tests I will use something in betby Emmanuel - FoldaRap
Re: 30mm blower VS 30mm fans - 6 years ago
Today I discovered SimScale. I used it to perform a Computational Fluid Dynamics analysis on this shape. Making the volume usable for the online tool was a bit tricky (STEP was better than IGES or STL) but here is the result I guess it's ok.by Emmanuel - FoldaRap
Re: Rack & pinion - 6 years ago
Some progress on the ends, to ease the correct setup (no lateral play but still one degree of freedom for the spring effect) The second is better than the first. I have yet to try the third in real conditions, but it seems better when playing with it mounted on a profile.by Emmanuel - FoldaRap
30mm blower VS 30mm fans - 6 years ago
On this topic I will try to evaluate if the transition from one small blower to two small fans is effectively better Until now I'm relying on a 30x30x10mm blower (this one) Relevent specs : *CFM 1,4 or 0.039m3 /min *static pressure 0,285 dans H2O (71,0 Pa) *dB 29 *speed 7 500 tr/min This very small blower was interesting for its compacity, but does not exist in 24V. I think it could be betterby Emmanuel - FoldaRap
Re: Ball Plunger Spring - 6 years ago
Alas for you I did not made an intermediary design, because now (center hinge) the balls fit the two positions (folded/unfolded). And I think I see what you mean about the triangulation, as I'm considering to rebuild the Mendel sized FoldaRap, that also came in mind to add a bar. But for the original size, the spacing between the balls and the spring force, etc. are just rightby Emmanuel - FoldaRap
Re: Rack & pinion - 6 years ago
The back of the rack have a wave shape that act like a spring to compensate thatby Emmanuel - FoldaRap
Re: FoldaRap 3 - 6 years ago
Merci Boulon ! On peut bien sur partir d'une précédente version pour la mettre à jour, c'est justement l'idée (en tout cas c'est toujours ma toute première folda qui me sert de cobaye et qui évolue avec le temps) Au niveau matériel il y a surtout les pièces imprimées qui changent (à la rigueur on peut garder les pieds), l'inventaire est détaillé dans le fichier BOM :by Emmanuel - RepRap Groupe d'Utilisateurs Francophone
FoldaRap 3 - 6 years ago
Un petit coucou par ici, pour vous dire que j'ai repris le développement de la FoldaRap cet été, et que la version 3.0 sera bientôt prête (le plus long restera de mettre à jour tout le wiki inventaire et montage ^^'') Dans les principaux changements : pliage/dépliage en 5 secondes au lieu de 5min, sans outils support pour les têtes chauffantes e3D (plus générique que celle que j'utilisais juby Emmanuel - RepRap Groupe d'Utilisateurs Francophone
Rack & pinion - 7 years ago
This idea was put aside for production reasons back in the days (easier to buy belt in 50m roll), but I can implement it again now (so you can use belt or printed rack, both are compatible with the x-carriage once the little protrusions for the bearings are removed)by Emmanuel - FoldaRap
Re: Ball Plunger Spring - 7 years ago
Thanks The "ball plunger spring" consist of a cylinder in which a sphere is pushed outside by a spring. It is used in mechanisms like the folding handle of a luggage (the locking position when it is extended).by Emmanuel - FoldaRap
Re: Ball Plunger Spring - 7 years ago
06-sept-2017, end of the afternoon... Yaaaaaaaaaaaaaay ! It works !!! (Thanks David for the two M4 nylstop that I didn't had to complete this !) And some videos to show how easy it became. From 5min to 5sec ! 1/4 2/4 3/4 4/4 That's so coolby Emmanuel - FoldaRap
Printed Y-sliders - 7 years ago
Resurrecting this idea for the FoldaRap 3, and finally it works well That replace : By two printed parts... Simplicity wins. Leaving also room to replace the printed m3-nut-housing by winged-nut (easier to use) And here is some videos as a proof 1/3 2/3 3/3by Emmanuel - FoldaRap
Ball Plunger Spring - 7 years ago
I found that thing few years ago, I will try to replace the locking screws with it, that would make the folding/unfolding much quicker and easier Found some suppliers in France too, by searching for "Poussoirs à ressort à bille" K0334.210 The M12 size should be good, with a ball of 8mm in the frame profile slot of 6mm.by Emmanuel - FoldaRap
Re: Print PLA into PETG? - 7 years ago
PLA will stick to PETG while it is hot, but when cold it will delaminated very easily. (having found that, I'm using PETG with PLA as support material)by Emmanuel - Plastic Extruder Working Group
Re: using Prusa i3-MK2 improvements - 8 years ago
I think I see what you mean, those kind of motor exist in M5 thread size, I've some to make a prototype with. But it's a matter of cost in the end. If we say that DIY printers now can't align with the price of mass produced cheap ones (e.g. a Finder), the decision could be to use better components. Like with custom made computer nowadays (In that case that could be implemented in the FoldaRap 3by Emmanuel - FoldaRap
Re: Bill of Materials - Questions about Parts and Sources in Germany - 8 years ago
-grubscrew, the tip dont really matter as long as it is in contact with the motor's shaft -any 14N.m motors should be good, this was just a reference -the lasercut parts are mostly made in acrylic not necessarily aluminium -for flexible filament the bowden will not work thought : /by Emmanuel - FoldaRap
New Forum - 8 years ago
I forgot to announce it here, but we created our own forum to better keep track of all things related to FoldaRap/Mondrian/Altoby Emmanuel - FoldaRap
Re: Mondrian hotend temparture 10C below set temp. - 8 years ago
Une idée possible : dans le firmware, au niveau des =thermal settings= on peut régler le PID max, les cartouches 40W étant parfois trop puissante on le règle à 127 au lieu de 255, mais si la chauffe manque de patate il est peut-être intéressant de remettre 255by Emmanuel - FoldaRap
Re: CAD / STEP Files - 8 years ago
The source file is a .sketchup format if you want to play with it (but no step/iges files unfortunately)by Emmanuel - FoldaRap
Re: List of Small 3D Printers - 8 years ago
I took the liberty to add the (Mini) Mondrian which was a small H-bot at the beginning (if you look at the early dev)by Emmanuel - General
Re: New print surface material? - 8 years ago
This surface seems interesting, I will give it a try too on my FoldaRap/Mondrian and make a report later (mostly interested by the compatibility with nylon or PC) I have used polyimide, pmma, buildtak, printEZ, glass, glue stick... and for the moment I prefer the simple kapton tape or bare glass to the various polymer stuff.by Emmanuel - General
Re: New release : FoldaRap 2.5 - 9 years ago
Oh ok, for the difference in printed parts you can keep the 2 front feet maybe, and will need to re-print everything else (mostly the XZ gantry).by Emmanuel - FoldaRap
Re: New release : FoldaRap 2.5 - 9 years ago
Thanks @FA-MAS For the Y-axis, in fact it have been tried a while ago : @BJacoby I've tried to follow that here but we have yet to add the vitamin's difference for the latestby Emmanuel - FoldaRap
Re: Nouvelle version FoldaRap : 2.5 - 9 years ago
Les courroies en Z ça sera la 4.0 du coup, pour le moment il y en a que 2-3 existantes à ma connaissance (mais avec encore les barres en Y pour le moment) (Merci !)by Emmanuel - RepRap Groupe d'Utilisateurs Francophone