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About AON

  • Birthday November 15

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  • Gender
  • Location
    Niagara Region, Ontario, Canada
  • Interests
    Spin and fly fishing;
    Violin and fiddle (you need to understand the difference to get this);
    Wood carving;
    Reading historical/fiction;
    Use to do a lot of sailing and hunting when I was much younger.

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  1. I picked up my new 3D prints from the local library this afternoon. This was extremely fast, they must have enjoyed the challenge. It was different from the usual mundane items they print. Two sections printed vertical (standing on end). One muzzle and two breeches with one version of the breech with the insignia. This is what was on the note they sent me: In terms of the flat insignia, it didn't come out very clearly when we used the file's default thickness, but when we added another millimeter to its depth it came out much more clearly. You should be able to sand this thicker version down to get the look you want. The version of the breech with the insignia on it also looks surprisingly good. All files were printed on the "Hyper" resolution setting with a layer height of 0.8mm. When printing the insignia, I slowed the print speed down to 20mm/s to ensure the details came out as precisely as possible. They look a million times better than the earlier horizontally printed halves. Judge for yourselves...
  2. Had my meeting about 3D printing at the local Library this afternoon. I brought in my list of suggestions supplied by one anonymous forum member (thank you again!) and it was very helpful. Their machine is a 2 year old commercial printer. I was told the 8 Mb file size limit is set by the Library's internet file transfer size limitation. If I bring my files in on a thumb drive (stick) they can be any size I care to save them at. By this logic I can split the gun into merely two pieces, a muzzle half and a breech half. The split will be at the edge of the 2nd reinforcing ring just past the trunnion to keep the printing supports under the trunnion short. We discussed printing the insignia flat as the wrapped version has a maximum offset of 0.01 inches (0.254mm) at 1:12 scale. As the PLA filament diameter is 1.75mm (0.069"), or x12 = 0.828 inches full size, this would be one layer of plastic on the machine bed. They feel it would be very difficult to lift off without breaking it. They asked if I could print it thicker (taller) part as two layers might be easier to "peel" off the bed. I've just e-mailed them a couple more questions regarding this... trying to understand the difference between filament diameter (1.75mm) and layer height (0.15mm) as it relates to my build scale (1:12). They also suggested I print a second breech end of the barrel with the insignia on. They are not sure how this will turn out but they don't have any problem with trying. So that is what I will do. As Christmas is around the corner they are swamped with requests to print stocking stuffers. I told them mine was not a Christmas present so I haven't any problem waiting. Meanwhile (soon) I will cleanup the parts I have, acetone slovent weld them together and paint the insignia with my version of yellow ochre. I am back to re-making frames for my 74 but won't be posting there until I have something worthwhile showing.
  3. Update.... I received a PM from a forum member who took my file and attempted to print the small section at the insignia horizontally with his printer. The results were similar. He made many suggests: print vertically, 2 to 3" long sections; divide at an top or bottom of a ring not through it. Layer height no larger than 0.2mm. Infill of 20%. Wall thickness no less than 1mm (1.2 seems to be ideal without being overkill) Print with Brim of 5-8 lines (this will be a layer surrounding the parts that helps them adhere to the bed). He concurred that printing the insignia separately and flat would likely result in better quality. I have a considerable amount of info to discuss with the library staff. Now I need to make smaller model sections. This should be easier by reusing the original sketch.
  4. A question for people out there that have some expertise with 3D printing. I have two sketches below. One has the cannon divided into two pieces, almost equal halves, whereas the other has it divided into five unequal pieces. What advantage or disadvantage is there to these divisions if presented as individual 3D vertical prints? The first bad thing that comes to mind for me is that the ribbon of hot PLA plastic having no support at the bands when printed vertically... they may droop or simply fall away... even if they are rotated and printed upside down where possible. The first possibly good thing is that the smaller sections allow larger detail in the 8Mb limited STL file. Is there a better way to divide this?
  5. Thank you Hexnut. Definitely looking at the option of printing vertically in sections. What do you mean by "as a couple-layer flat"?
  6. It shouldn't be a question of what is easiest. What was your original intent? Doing this, even though it might be extremely challenging and sometimes down right aggravating, will ultimately make you the happiest in the end.
  7. Just heard back from the library. I will meet with them Tuesday afternoon. They only have the one tip but can adjust the feed and % infill. They are more than willing to try again.
  8. Also... I typed 1.5 mm (0.059") but meant 0.15 mm (0.0059"). Yes... that is a huge difference. I am not comfortable with SI Units. Just barely understanding °C , forcing myself by having everything in the house display that way. If I submit and print half the barrel (vertical or horizontal) at a time it could be saved with more detail to meet their 8Mb max limit. They might adjust feed and speed but then they have a 5 hour max print limit. A meeting with them should help me to understand this all better.
  9. Jud Thank you for the offer. I will make up a short list and PM you before the weekend. At the moment I do not know what accessories (i.e. nozzle tips) the library has or even if they are willing to make any adjustments at all. I will contact them in a moment to arrange a meeting next week.
  10. Thank you for your coment Jud! However, I feel that would be counter to my original intent. Printed locally. Our local College has a 3D printer but they will not compete with local businesses. They cannot even offer to do a "one of" for free, even as a teaching aid. It is against policy. I am not looking for perfection. I have yet to create perfection. I see the beauty in the rawness of this piece's imperfection. Having said that, I would not turn my nose up to something that was prettier! I wanted a 3D printed cannon and that is what I got. I think I will try to work with the library first before I might consider any other avenues. I also want to say, you really have to get quite close up to see what shows up in the photos. My display case prevents that. Or possibly my eyes need a re-alignment / adjustment. I will get feed back regarding the aesthetics from the club this Sunday.
  11. I will contact the Library and attempt to meet and discuss with them what they would be wiiling to do and what I might do to improve the end result.
  12. Druxey and Dowmer Thank you for the comments. The printer was set at 1.5mm layer thickness and 20% fill. I confess I do not know if this is good or bad. Trying again vertically in two or three pieces might be worth trying. The insignia could would be applied seperately. I've been watching numerous YouTube videos regarding gluing and smoothing. Thank you again.
  13. Batteries charged but the photos were surprisingly not much better. The only thing that it caught that the phone wouldn't is the royal insignia. I am considering having it printed a second time so I might try sanding one of them.
  14. Well, the batteries in the SLR are almost dead, so while they were recharging we tried with my wife's new fangled phone camera. Following are some results. I did not clean off any of the temporary printing supports so the fit in the carriage was not in anyway perfect. I set the bottom half in the carriage and then placed the top half on it. Both ends seem to bow away from each other but the good news is they pull together with very little force. I also set the cannon balls on the rack. They do not seat properly. The flat plastic foot seemed to have spread out a bit. I measured the ball and diameter wise it is perfect enough but the flat bottom diameter measured larger than it should have been. I will sand these down to fit. You can clearly see the stepped layers in building the pieces. Funny enough though, you only notice it when you get up quite close. Otherwise the look of it is beginning to grow on me. If I were to sand the whole thing down it would be dimensionally inaccurate... and I might possibly ruin it. The third photo shows the first layer being laid out as three outer strings and a wavey filler. So if you sand it will there be holes? I will leave it all untouched for now but I`ve found online (YouTube) that ABS glue works on PLA plastic, and this I have. Apparently you can weld the parts together by brushing solvent (nail polish or acetone) and clamping them together. I will leave it all alone until after our club meeting this weekend.

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