On Wednesday 11 November 2020 02:44:09 [email protected] wrote:
> On 2020-11-11 05:12, Gene Heskett wrote: > > Greetings 3d printer X-spurts; > > > > So I've come to the conclusion that quite a bit of what you can > > download > > as .stl's, are intended to be very low resolution so as not to > > compete with the same you-toobers commercial offerings. > > I don't know if that is the reason, but I have certainly found that > only a small percentage of the Thingiverse stls are worth using. > That's mostly because I have issues with the design of the parts, > rather than the printed output, but your thought adds an interesting > dimension to the argument. I don't know how print quality is related > to an stl file, becuase I had assumed most of the quality of > interpretation lies in the slicer. But maybe not. > > What nozzle size and layer thickness did you use? box stock, .4mm nozzle. micro-swiss feeder conversion but has OEM hot-end mounted because the micro-swiss hot end is AFAIAC, a defective design prone to freezing up. I can put a small washer under the upper tubing fitting to compress the tube solidly against the rear of the nozzle so the filament never touches the hot end metal until it is inside the nozzle. One MUST prevent the liquid plastic from being able to migrate up into the fan cooled upper heat sink portion of the hot end. This limited contact only in the nozzle limits the maximum flow rate, so feed speeds need to be a bit lower but that's a very small price to pay for a hot end that doesn't freeze up. The output sprocket currently being made has the extruder feed set at 86% as I am still fine tuning that feed. Currantly set at about 5x the factory setting. That made a cat the is too light to weigh on my powder scale, and which I can read a newspaper thru. > I assume it was much > the same as for the harmonic drive, but I certainly find the > difference between, say, o.2mm and 0.1mm layer height makes a huge > difference to the quality. Currently set at .12, as low as cura offers for this printer. > I tend to stick with 0.4mm nozzle size, but > I know from friends that a move to a smaller nozzle can improve > quality even further - even if print times do become rather extended > for larger jobs. I am using a cheap Anet A8 printer, which is > essentially a copy of the Ender i3. > > > And my printer isn't > > the piece of crap I turned off in disgust 6 weeks back. I am > > impressed. > > No; low price does not necessarily mean low quality prints. It does > mean the printer will probably require some fettling and mollycoddling > to give of its best, but there are no surprises there. True. TANSTAAFL principle. My fight with hot ends is a prime example. > I note that the recent models of the Anet and Ender feature more rigid > metal frames (Anet is plastic) - although they are still a bit flimsy > if you ask me. > As with machine tools, rigidity is (nearly) everything. And the ender 3 pro's all metal frame seems more than adequate. I had visions to seeing the added weight of the extruder motor, but have not seen any adverse effects on the ballistics that I can discover. The table its on is a very nervous fold-up design, but as long as it rocks and rolls as a unit its not bothering me because it moves as a single unit. I cannot see any advantage to adding the 20 some lb concrete 18x1.5" paver under it because that added mass under it only stresses the frame more. I think it it was hung from the ceiling with 2 wires, it would still work just as well. OTOH, I've been known to think outside the box. ;-) The only thing missing from the zip of this device is the BOM. > Marcus Thanks Marcus. Cheers, Gene Heskett -- "There are four boxes to be used in defense of liberty: soap, ballot, jury, and ammo. Please use in that order." -Ed Howdershelt (Author) If we desire respect for the law, we must first make the law respectable. - Louis D. Brandeis Genes Web page <http://geneslinuxbox.net:6309/gene> _______________________________________________ Emc-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/emc-users
