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tseary

Eurobricks Vassals
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  1. tseary
    I agree, but my point is that it wouldn't take an army of printers for a production run like this. Presumably print times don't vary by a huge amount between SLS printers. Personally, I hope that TLG isn't investing too much in 3D-printed production parts. In my opinion they only appeal to the collector market, and don't add play value.
  2. tseary
    For some very coarse napkin math, the Formlabs Fuse 1+ SLS printer (for example) can print a full job in 14 hours. The build volume is 16.5 x 16.5 x 30 cm. Assuming the little train is 2 x 2 x 4 Lego units, plus some margin, you could fit about 500-700 of them in a job. Running around the clock and ignoring scrap factor, they could print a run of 50,000 parts in a month on just two of these printers. The cost would be well under $1M. That points towards this being a gimmick.
  3. tseary started following Custom proportional controller for Mould King Servo Motor
  4. tseary
    You make a good point. I didn't know that Buwizz had that feature, I was mainly thinking of the default PF receiver.
  5. tseary
    @gyenesvi So I did assemble a couple of prototypes of the servo adapter. It works as intended, but I'm not totally happy with it because there's no way to trim the center and limit angle of the servo. Adding that feature will probably mean going to a different microcontroller, which is not so bad, but it won't be as compact of course. Before I make another version of the adapter, I have to finish the test car I'm building. Like all hobbies it has to compete for time...
  6. tseary
    That steering gear is really cool! I was wondering how to build a skid-steer vehicle with the Technic Control+ hub, which is intended for rack-and-pinion steering. This could be a way to make that work.
  7. tseary
    @Stereo That's a good one, it would be useful wherever rigidity is needed. Mine isn't so strong because of the 1L side. I'm tempted to look for other angles of 360/N so I can build a big Ferris wheel or something.
  8. tseary
    I'm posting on this old topic because I was nerd-sniped by this challenge today, and I discovered a way to build a perfect 45 degree angle! In the top image, the red link forms the hypotenuse of a triangle with side lengths 1, 3, and 2*sqrt(2). The structure can be doubled up in a tight space for rigidity, as shown in the bottom image.
  9. tseary
    tseary changed their profile photo
  10. tseary
    I slightly prefer the black rams, but the white cab looks great. The blade looks a lot better without black parts too.
  11. tseary
    A couple of suggestions: Minimize the number of idle gears that are turning in pullback mode. I think they will sap the power of the pullback motor. You might achieve this by placing the clutch directly on the output axle. Perhaps do away with bevel gears entirely. It will be most efficient to use spur gears for everything. The rectangular frame parts (https://www.bricklink.com/v2/catalog/catalogitem.page?P=39794, https://www.bricklink.com/v2/catalog/catalogitem.page?P=4526, etc.) are good for keeping things square and rigid, if you have some of those.
  12. tseary
    Yes and yes. The PF cable is permanently attached, and the servo plugs in. The microcontroller is the smallest one I could find, which has limited resources. The program is small, so writing Assembly is not too much of a burden, although I am using an Arduino Uno as a programming interface. The programming cable is held in place by hand, in the 4-pin connector.
  13. tseary
    Last week I received the new boards for my PF to servo converter. I got the size down to 21 x 10 mm. I still need to write the program, which will be in Assembly.
  14. tseary
    There's so much to notice and appreciate here. The fully tiled boom and cabling looks great. NPU on the wrist straps around the spare tire. And I just noticed the crane operator! I call myself a purist but I'm also guilty of painting on occasion... I'd say it's completely justified for this result.
  15. tseary
    Nice work! The possibility of driving directly with a gamepad is very appealling compared to the Lego remotes, or smartphone. You mentioned there is battery discharge protection. Is that built into the motor driver, or is it implemented in software?
  16. tseary
    Thanks for asking. I've designed a new minimal version without the IR receiver, and only a single servo output. Using the smallest SMT parts I could manage, the board measures just 12x24 mm. But I haven't ordered the parts yet, as I need to finish some other work before digging into this. The new design has a different microcontroller, so it will require fresh code.
  17. tseary
    I'm here for the transparent tires! I just picked up the Creator roller skate for the pink tires too. Maybe someone will find a nice way to illuminate the green tires too.
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