tag:blogger.com,1999:blog-8639215628525378898.post8375748307625731382..comments2023-09-20T15:32:40.483+01:00Comments on Reprap development and further adventures in DIY 3D printing: Jammed Fr!gg!n Nozzle! - #30DoC Days 15...18RichRap3Dhttp://www.blogger.com/profile/09348596756294999378noreply@blogger.comBlogger16125tag:blogger.com,1999:blog-8639215628525378898.post-64303389374581501422013-02-01T10:46:49.246+00:002013-02-01T10:46:49.246+00:00This is really informative. Thanks for sharing thi...This is really informative. Thanks for sharing this to us.<br /><a href="http://www.downswater.com.au/" rel="nofollow">Pipes Toowoomba | Fittings Toowoomba</a><br />jon wilsonhttps://www.blogger.com/profile/04726829113690962449noreply@blogger.comtag:blogger.com,1999:blog-8639215628525378898.post-57638549187323376622012-08-21T21:45:57.445+01:002012-08-21T21:45:57.445+01:00Hi there. Sorry about the delay on this reply, but...Hi there. Sorry about the delay on this reply, but Hey Progress! :D<br />Speaking of which, I have linked your repraper-review here: http://reprap.org/wiki/FilamentReviewsRepRaper<br /><br />Keep up the bloggin! :Ddanielpublichttps://www.blogger.com/profile/12871801232697806886noreply@blogger.comtag:blogger.com,1999:blog-8639215628525378898.post-86200442534783407812012-07-31T09:48:11.642+01:002012-07-31T09:48:11.642+01:00I had no time to read all the post from the reader...I had no time to read all the post from the readers, but I have something to explain about materials regarding our experience. <br /><br />We started buying material with a contact in China called "CB Photoelectricity". They send us some filament, it didn't seem to be in bad conditions, we got 5kg rolls in Translucent Green (Exacly the same color that you reported problems) Translucent Blue and Translucent black. We bought both 1,75mm and 3mm filament.<br /><br />Translucent green 3mm worked properly and we had good results when printing. Also translucent blue 3mm was ok. We had problems with 1,75mm and the 3mm black material. <br /><br />They seem to had some particules insided (same shape that you have reported), they blocked our nozzles several times because we thought that the problem was in the nozzle not in the material. Personally I don't think that these "balls" were bearing balls because they were so little but I can not go back to examine another time them. <br /><br />The point is that you say that this green material you had in bad condicionts came from ESUN, and exactly the same color for me came from "CB Photoelectricity". This fits with my personal theory of where the PLA, and ABS Material were coming: <br /><br />For me, at the beggining, there was only ONE provider for all the chinese suppliers. I can say that because now we have ESUN material that is COMPLETLY different from this sample you show. ESUN material is now darker, well shaped and seems to work properly. <br /><br />I was also having a conversation via email with "CB Photoelectricity" that told me (in april) that they were about to have "new material" with their new machines... so I deduced that they were not selling their material and until that point they were a simple dealer. <br /><br />We started buying material to ESUN due to bad quality of the CB Photoelectricity's material so when trying ESUN material we were very carefull to get good results. At this moment we haven't reported any problem. No bad shape, no balls inside, no curly sections or any other problem. About 50 kits have been printed reporting 0 problems.<br /><br />I think that in the past this generic provider was not only providing 3D printing machines and was not meeting our needs. Seems that ESUN started their own machines and right now their materials are quite good.<br /><br />Regarding this quality issues we would like to send you a 1kg roll for you to try and to have a report. We have less experience than you in quality and detail issues and would be good for all to have a complete report that show us what is the real quality of a chinese provider in comparison with the other providers you tried in the past.<br /><br />www.RepRapBCN.com<br />reprapbcn.wordpress.comAnonymousnoreply@blogger.comtag:blogger.com,1999:blog-8639215628525378898.post-31005048023923174772012-06-26T06:37:54.557+01:002012-06-26T06:37:54.557+01:00how about something like a caulking gun that they ...how about something like a caulking gun that they use in the fast food industry for ketchup, or for frosting and elsewhere i'm sure? it has the holding tube for the stuff and has a plate at the bottom, covering the nozzle, then when they squeeze the grip, it lifts the plate and squishes a portion out, then drops the plate again. the plate is lifted via a rod that runs out thru the center of the holding tube and is actuated entirely outside of the holding chamber.<br />in this case the holding tube is the melting chamber, and instead of a plate, we use a small diameter rod, we'd have to modify the extruder body to get the filament to be pushed in at a slight angle to the side rather than straight down like it is now because the rod would be traveling thru that space to be actuated from outside the nozzle assembly itself by a small solenoid, or servo motor, mounted directly above the tip, basically right where the filament enters the nozzle in current designs.Scantrontbhttps://www.blogger.com/profile/01367281403952304750noreply@blogger.comtag:blogger.com,1999:blog-8639215628525378898.post-41972857488353117152012-06-26T06:32:43.931+01:002012-06-26T06:32:43.931+01:00This comment has been removed by the author.Scantrontbhttps://www.blogger.com/profile/01367281403952304750noreply@blogger.comtag:blogger.com,1999:blog-8639215628525378898.post-34194694673342973612012-06-25T20:09:18.461+01:002012-06-25T20:09:18.461+01:00Hi Hamish I'll try out an Arcol hot-end at som...Hi Hamish I'll try out an Arcol hot-end at some point, it will make a good compare to the J-heads I have been using for the last year.<br /><br />I have just been trying to work out the voids in some of my parts, I agree It could be the acceleration settings, I do have them set rather fast, it looks like the nozzle is being 'jerked' away too quickly as some sections are meeting up, leaving a small void. Or it could be a loose belt? That's the problem with changing things all the time and almost never doing the same print twice. I went through 3 slic3r releases and some firmware tweaks during that print session.<br /><br />Cheers,<br /><br />Rich.RichRap3Dhttps://www.blogger.com/profile/09348596756294999378noreply@blogger.comtag:blogger.com,1999:blog-8639215628525378898.post-74704511952893205512012-06-25T20:02:10.011+01:002012-06-25T20:02:10.011+01:00Hi Daniel
I did start doing a big filament review...Hi Daniel<br /><br />I did start doing a big filament review last year, but it was so boring and tricky to quantify I abandoned the blog post. When you find a filament that's nice and easy to work with you sort of stop fighting the not-so-good stuff. but it's always to get other people's opinions about printing plastic, so it would be great to have some more technical capabilities of the materials we use.<br />I think reprappers are not a forgiving lot when it comes to poor quality, and rightly so, but it does make me wonder if some of these suppliers actually test what they produce in 3D printers. I doubt it, they have a whole world of 'testers' out there they just will not get any repeat business.RichRap3Dhttps://www.blogger.com/profile/09348596756294999378noreply@blogger.comtag:blogger.com,1999:blog-8639215628525378898.post-68116871343463522712012-06-21T21:16:18.646+01:002012-06-21T21:16:18.646+01:00I for one, has also seen balls(maybe, it was over ...I for one, has also seen balls(maybe, it was over pretty fast) crusading for my hotend. Fortunately, I managed to flank them of with my biggest sharpest kitchenknife. Even though it was long ago that dark and dreary evening, ack.<br /><br />More seriously though, this was one of the reasons that I made those pesky wikitables, that I have gladly stayed away from since. Because, the firmer we grab those suppliers by the balls (needless to say, not those they apparently deliver) with a separate page for each company. <br /><br />Here is the template: http://reprap.org/wiki/FilamentNewCompanyReviewTemplatedanielpublichttps://www.blogger.com/profile/12871801232697806886noreply@blogger.comtag:blogger.com,1999:blog-8639215628525378898.post-16131938751449625642012-06-21T11:28:43.639+01:002012-06-21T11:28:43.639+01:00Balls, Inspector?! (Brings back memories of an esp...Balls, Inspector?! (Brings back memories of an especially cheesy 1980's New Zealand TV advert for cheese balls.)<br /><br />Anyway, what a bugger, and thanks for the heads-up. Not that I feel any need or intend buying from anyone other than the great Faberdashery.com<br /><br />BTW, Having a V3.0 Arcol, I can vouch for Laszlo's claim that his hotends are very easy to clean out, but the whole process still takes 45 mins to an hour each time.<br /><br />While I notice it, can we talk about a detail in your last image of this post 'assembled_1.jpg'. Just above the laterally oriented edge of - and actually in the LH piece of yellow material, there is a collection of voids. I began noticing similar features in my own prints were a precursor to a hotend blockage. The only method I've found to reduce such details appearing - and possibly also the blockages from happening - is to print at 40mm/s or less. I think the voids are possibly also related to the rate of acceleration in gcode produced by slic3r. I never noticed such details appearing in parts printed from sfact generated gcode.<br /><br />Any thoughts?<br /><br />Keep up the good sleuthing!<br />Hamishhairykiwihttps://www.blogger.com/profile/05885780137466741096noreply@blogger.comtag:blogger.com,1999:blog-8639215628525378898.post-30368290524808677132012-06-20T22:37:39.125+01:002012-06-20T22:37:39.125+01:00Esun are not easy to communicate with, "There...Esun are not easy to communicate with, "There are Balls in your filament!" "Balls I tell you" ~ and to be honest I'm not all that interested in what they would say about it. I do feel for anyone else who is struggling with poor plastic, it really makes a big difference to the achievements possible and the enjoyment of 3D printing.<br /><br />3 balls are all I spotted with the naked eye, I'm sure there would really be more than that - I get the idea of cutting out the bad bits, but it's got past that stage with me, I want to see it melt and have the satisfaction of knowing I destroyed it. I gave so much of it away last year, I need to check if anyone else had problems with it.<br /><br />I will share the creation.<br /><br />And check out Lazlo's blog post in the comments above, he had some very odd stuff inside that ABS, I have no idea what it was, but it didn't look good from the photo.<br /><br />Cheers,<br /><br />Rich.RichRap3Dhttps://www.blogger.com/profile/09348596756294999378noreply@blogger.comtag:blogger.com,1999:blog-8639215628525378898.post-71373614501140411572012-06-20T18:18:52.910+01:002012-06-20T18:18:52.910+01:00Hi Rich,
Very interesting find these ball bearing...Hi Rich,<br /><br />Very interesting find these ball bearings in the pla... I wonder what Eset would have to say about this. Ever tought of asking them? with some pictures as proof.<br /><br />Also if those balls are metalic it may be a good idea to start checking our filament with a metal detector or magnet. This may be more common than we think with chinese stuff. Or maybe it was simply a failling machine and they since repaired it.<br /><br />Now instead of wasting that transparent PLA why not just cut the parts with the bearing away? (if theres only 3 balls left it would be easy)TCZhttps://www.blogger.com/profile/15250724967143673727noreply@blogger.comtag:blogger.com,1999:blog-8639215628525378898.post-89967127692060928262012-06-20T14:53:57.329+01:002012-06-20T14:53:57.329+01:00Hi Lazlo, thanks for the link to the post, it does...Hi Lazlo, thanks for the link to the post, it does look like you have had very similar problems with less than great filament.<br /><br />I must try out an arcol hot-end soon, it's a very nice looking design, I have always liked it.<br /><br />I missed out on your mini Hyena's, I'll order some of them as soon as you have them up on the webshop. <br /><br />And I did spot your Rpi case at the weekend, very nice, I'm adding mounting 'ears' to my design.<br /><br />Cheers,<br /><br />Rich.RichRap3Dhttps://www.blogger.com/profile/09348596756294999378noreply@blogger.comtag:blogger.com,1999:blog-8639215628525378898.post-54421913890720675702012-06-20T14:38:48.134+01:002012-06-20T14:38:48.134+01:00I thought the same, but also worried that the phys...I thought the same, but also worried that the physical flow of the plastic would overcome the magnet and just push the ball back down. <br /><br />I wondered if you had the ball at the end and had a horizontal groove in the nozzle end, you could use hardened length of metal (a pin?) across and pulled up into the groove with a electromagnet at either side, this would push up the bearing and allow flow around the ball and past the pin. you would end up with two sides of extrusion, but it may flow back together under compression onto the object. To seal drop the pin down and the pressure on the ball seals the end?RichRap3Dhttps://www.blogger.com/profile/09348596756294999378noreply@blogger.comtag:blogger.com,1999:blog-8639215628525378898.post-80930186360710162522012-06-20T12:52:35.043+01:002012-06-20T12:52:35.043+01:00Hi,
(seems like my post from the morning got lost...Hi,<br /><br />(seems like my post from the morning got lost somehow)<br /><br />I ran into this issue a few years back:<br />"Worst smelling filament ever"<br />http://blog.arcol.hu/?p=937<br /><br />Since then I design my hotends to be "self cleaning", ie. I can remove the whole inside mess as a "cold plug", so everything comes out, and clean.<br /><br />I think v4 mastered in this. The "self cleaning" feature is awesome. <br />If you fear you got something inside, you just unscrew the nozzle at room <br />temperature (or better at around 100-140C), and it comes out clear from the nozzle (or breaks the filament, but in that case you retry after a bit of extruding).<br /><br />I even clean each nozzle before shipping, three times. But I also advise in the assembly manual to clean the nozzle again:<br />http://wiki.arcol.hu/arcol-hu-hot-end-v4-assembly and<br />http://wiki.arcol.hu/arcol-hu-hot-end-v301-mounting-the-power-resistor<br /><br />I refer specifically to this picture:<br />http://www.flickr.com/photos/74141229@N00/5211107055/<br /><br /><br />Best, <br /> Laszlo<br /><br />ps: Btw, I also have an ongoing Raspberry Pi aluminum case, <br />maybe you are interested:<br />http://www.indiegogo.com/arcol-raspilaszlohttps://www.blogger.com/profile/17325566441088804268noreply@blogger.comtag:blogger.com,1999:blog-8639215628525378898.post-42086166866486900062012-06-20T11:25:05.874+01:002012-06-20T11:25:05.874+01:00The obvious solution would be using a ferromagneti...The obvious solution would be using a ferromagnetic ball bearing with a non-ferromagnetic nozzle and using a magnet to pull the bearing out of the flow path, and removing the magnet to let it set itself back in the opening. I know the heat we're dealing with can demagnetize some materials, but neodymium might have a high enough currie temperature if you insulate it, and electromagnets might also be usable. The ball itself would not need to be magnetized as long as it can still be pulled strongly enough toward a magnet.whosawhatsis?https://www.blogger.com/profile/12792264289634575186noreply@blogger.comtag:blogger.com,1999:blog-8639215628525378898.post-75217822489281066222012-06-20T08:35:38.939+01:002012-06-20T08:35:38.939+01:00Seems like you completely missed my 'worst fil...Seems like you completely missed my 'worst filament ever' blogpost 2 years ago...<br /><br />Since then I design my hotends to be "self cleaning", ie you can cold plug the whole mess from the inside if the nozzle.<br /><br />My arcol.hu v4 has the best "self cleaning" ever.<br /><br />I know what frustration it causes. I was ther I did that. <br />I also include in my buildlog to clean the nozzle before assembly, despite I clean all of it three times before shipping.<br /><br />In short I do everything I can to avoid or minimize frustration like this.<br /><br />Best,<br /> Laszlo<br />http://arcol.hu<br /><br />ps: I now have a raspberry case campaign ongoing, you may be interested:<br />http://indiegogo.com/arcol-raspilaszlohttps://www.blogger.com/profile/17325566441088804268noreply@blogger.com