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    3D printing an engine frame?

    I do not like the printed gears that much. Metal ones just are "more real". The brass ring gear was made with my "poor mans slotting head" changing the milling spindle with the slotter attachment, mounting a manual dividing head. Then slot one gap at a time.
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    New mill and lathe.

    Haha do not let yourself be fooled by "the same factory" myth. Imagine: Feeding your favorate lady at the first date vs. feeding the neighbours cat. ( All coming from same kitchen in USA? ) :cool: Greetings Timo
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    3D printing an engine frame?

    1st result of todays experiment: The picture shows gears in module 1 (roughly 24 DP for size comparison). White gear PLA, came just out of the printer (still warm) 60 teeth internal. Made with Freecad without tweak. Export *.stl and sent to printer. Small metal left, I bought from the gear lady...
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    3D printing an engine frame?

    Hello, I am confused, partially because I am also very new (once again) to Freecad, I understand the difficulties to edit an imported stl or whatever foreign file. But if I open two files .FCStd I got the bodies on the left model tree in the combo view. These files I am able to save, close...
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    3D printing an engine frame?

    p.s. I managed to make my Ring gear. I had to create a "new body" first, then start the involute gear operation, then pad it. Then I made a disc, and substracted the gear from the disc. There is an option external gear true/false. (I hope that makes internal gears). How to test a ring gear? I...
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    3D printing an engine frame?

    Now we are diving into rabbit holes, but I hope it does not get too confusing. In my limited expericence with printing gears, I saw module 1 (approx. 24 dp) work O.K. Those printed gears also worked together with store bought and diy cut gears. Maybe a DP32 can still work, I could try that...
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    3D printing an engine frame?

    The thread is called "3d printing engine frame", and now a "team built" of a freecad model is discussed. :) I do want to be annoying, just thinking it might evolve in a helpful sort of a "beginners" guide to freecad. If so; it would be nice if people would find it more easy later. Should a new...
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    anybody know anything about this lathe?

    The lead screw is not really important as long as the change gear box is providing what you need. At least that is what I saw, there is a knob that needs to be thrown from II to I (unfortunately not talking about the machine in question here, but about a totally different one) and off you go...
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    3D printing an engine frame?

    Is it this one? You are refering to? Nasty internal gear and some smaller parts? Greetings Timo
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    3D printing an engine frame?

    This guys instruction videos on gears for fusion 360 users I found very helpful. He is not missing out some of the important details that make the difference between a 3d printed gear pair, and a 3d printed gear that "cooperates" with existing standard gears.
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    Thread repair

    A major moral difference is, whether you have to deal with your own false economy (time included) or (while getting even more grumpy about it) dealing with someone elses false enconomy :-). Patience, learning and humor keeps us going. Better learned the hard way, than to remain stupid? Once my...
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    Thread repair

    M3x0.5 should have a major diameter of 3 mm +- something. Plus 0.7 mm oversize seems a lot.
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    Thread repair

    Was not very difficult :cool:, its a picture of a store bought item from the internet. Haha.... I just remember when I accidently made the holes in a casting too big. I turned down the head of an M4 screw to 5 mm on the lathe and threaded an M5x0.8 on the remains of the bolt head. I ended up...
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    Thread repair

    I saw some studs once for the scooter manifold. The threaded holes fail often on older engines. So they use a tap that fits just into the stripped hole. e.g. M7x1 for an M6 hole. The M6 has the same outer diameter as the M7x1 tap drill size. So the guy just threaded the sripped hole. Inserted a...
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    A question regarding Solid State Ignitions

    Hello, I have really no clue what the black box does inside or how they function, When the taiwanese 4-stroke scooter stopped working the friendly elder man sold me this for approx. 20 USD plus another 10USD for "putting it into action". Is this info of any value for you? Maybe you can find...
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    Damages during project.

    It was a Vee block to clamp round into a vise. Not a precision ground one but more the drill press easy type. They come as a matching pair.
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    Damages during project.

    Hello, No it is too small to match the vice jaws, but I could make it nice and square and use a parallel under it. Good: I did not dump it into the scrap bin yet. :-) Greetings.
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    miniature transmission

    The Torotrak seems very complicated to make. ( building a scale model of a modern double clutch gearbox? :cool: ) For the model boat you might get away with a rubber O-ring on the "torotrak-model". Would be interesting to see one made.
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    miniature transmission

    Hello, makes sense, when trying to find something on the typical Chinese sales platorm they looked like there was no outside control of the clutch. From the video it seems not be too overly complicated to make one. But the orignial question was also how to implement a reversing function...
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    miniature transmission

    Now while playing around it comes to mind that this might as well be used as a easy normal clutch. Open the brake, shift in reverse, apply brake again?
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