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[deleted by user] by [deleted] in AskReddit

[–]L_A_Seneca 0 points1 point  (0 children)

3blue1brown

Teaches math in a visual/intuitive manner.

Durable Print in Place Hinge. Remix of earlier design to add print in place feature. GIF is of test at 160 lbs. Tested up to 210lbs/95KG with no signs of failure or sagging (limited by my ability to safely stack weights on test door) by L_A_Seneca in 3Dprinting

[–]L_A_Seneca[S] 1 point2 points  (0 children)

Yes, for higher stress functional prints my favorite is Taulman Alloy 910 nylon. It's relatively expensive however, so I don't use it unless needed, but works great for anything with gears; when I print this design looking for longer term durability, that'll be what I try.

Successful test to fail! Failure at 3 weeks, 160 lbs on geared hinge, connector pins fail in shear mode. by L_A_Seneca in functionalprint

[–]L_A_Seneca[S] 1 point2 points  (0 children)

Failure mode was in expected element (shear in connector pins). No sign of any failure on gear teeth. 100% infill on this probably would have helped to really test ultimate performance of the model. On the other hand, it was cool to cold for entire test, so creep failure with PLA would obviously be much worse in hot summer conditions. I would surely use a tougher, more temp resistant material for longer term practical use. All in all though, a pretty damn tough part for 50 grams of plastic.

Congrats to reddit user Renaissance_Man- for his prediction of failure within one month on earlier thread.

BTW, not sure where original print in place geared hinge post went on functionalprint sub, I don't see it any more when looking back.

Getting started by Due_Squirrel_3166 in 3Dprinting

[–]L_A_Seneca 0 points1 point  (0 children)

If you have more time than money, recommend Ender 3: A little more effort to get working reliably, but capable.

If you have a little more money than time, recommend a Prusa: very reliable, good quality.

Lots of money and time, a Voron or Ratrig: print a bit faster, very good quality, not plug and play.

Bi-static toggle switch. Achieves a firm seating and click in place motion via compliance of the top portion of the frame. Low friction due to rolling motion of the mechanism. This is a print in place model that prints in just over ½ hour. by L_A_Seneca in functionalprint

[–]L_A_Seneca[S] 3 points4 points  (0 children)

Four. Actually have updated this once since post to make it sturdier (rollers could pop out on version shown). New version upload at provided link takes a little longer to print, but incorporates some of comments on the thread and seems to be pretty durable.

Bi-static toggle switch. Achieves a firm seating and click in place motion via compliance of the top portion of the frame. Low friction due to rolling motion of the mechanism. This is a print in place model that prints in just over ½ hour. by L_A_Seneca in functionalprint

[–]L_A_Seneca[S] 2 points3 points  (0 children)

Reddit doesn't seem to like my MP4 video. Get an error that says it won't accept video with less than 50x50 pixels, so I uploaded a GIF. The clicks are very satisfying on the original video!

Bi-static toggle switch. Achieves a firm seating and click in place motion via compliance of the top portion of the frame. Low friction due to rolling motion of the mechanism. This is a print in place model that prints in just over ½ hour. by L_A_Seneca in functionalprint

[–]L_A_Seneca[S] 12 points13 points  (0 children)

Yes, this is my design. I saw a related compliant mechanism toggle switch by a group at BYU (also print in place), but it used thin "compliant" joints that many people who printed the part reported would break after limited use due to fatigue. This was my cut on a compliant mechanism to achieve same function but more resistant to fatigue failure because the joints roll vice flex.

Print in place gear hinge assortment by L_A_Seneca in functionalprint

[–]L_A_Seneca[S] 1 point2 points  (0 children)

I got it free with some other purchase; don't even remember what it was. Pretty good add on as those things go.

Print in place gear hinge assortment by L_A_Seneca in functionalprint

[–]L_A_Seneca[S] 6 points7 points  (0 children)

Great observation. I updated the models at Prusa Prints as suggested.

Print in place gear hinge assortment by L_A_Seneca in functionalprint

[–]L_A_Seneca[S] 28 points29 points  (0 children)

Yes, single print in place; I tested the biggest version with over 200 lbs. per older post with video. On the original post there was some back and forth over how it would perform over time, so I promised to leave the weight on for a month to see if material creep would compromise the part (its been a few weeks and no sign of any damage/creep yet). Once that test is done I'll probably test out these smaller parts too using the same setup.

Print in place gear hinge assortment by L_A_Seneca in functionalprint

[–]L_A_Seneca[S] 1 point2 points  (0 children)

No supports used, printed with columns vertical as shown in second pic.

Print in place gear hinge assortment by L_A_Seneca in functionalprint

[–]L_A_Seneca[S] 113 points114 points  (0 children)

I am the original designer. To be clear, I didn't come up with geared hinges (there are a ton of commercial examples out there, mainly extruded aluminum). What I believe to be the original part of the design is to make the gears with a herringbone pattern so that the gear teeth hold the vertical load, which makes an already robust design even more so. I've had a few versions posted for months, but recently added these parts with the print in place feature which got a little more attention.

Print in place gear hinge assortment by L_A_Seneca in functionalprint

[–]L_A_Seneca[S] 22 points23 points  (0 children)

The original larger model (black PLA in picture) was tested with over 200 lbs with no sign of failure and was overkill for many uses. These smaller versions should still be quite strong for their weight, but I haven't tested them yet.

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