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dr_spock

Eurobricks Archdukes
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Everything posted by dr_spock

  1. dr_spock
    I used a LEGO Technic linear actuator. I don't have the launcher built any longer. There is a clone brand double tracked railgun I stumbled across on YouTube a while ago -- KAZI German 80cm k(e) Railway Gun DORA. You can search for it online to get some ideas. Double track would be a bit challenging for curves. I tried using flexi-track for the outer track. Have fun experimenting.
  2. dr_spock
    My old cat didn't care much for trains. He loved to stash expensive LEGO soccer balls around the house. I know other AFOLs with dogs but they aren't train builders.
  3. dr_spock
    I think he did too. Special Baggage Car by dr_spock_888, on Flickr Day 365 of 365: Celebration by dr_spock_888, on Flickr
  4. dr_spock
    I used to use the library's 3D printer. I found it more convenient to have my own when I started designing and testing my own parts. I built a cheapy FDM kit printer. It is good enough to print functional parts like PU adapters and without some of the chemical handling requirements of SLA. 3D printing is slow. It may not be the correct process to use depending on the situation and application.
  5. dr_spock
    In the video, one of the engines had its motor turned around and changed positions with the other bogie. Another way is to make an extension cable that flips the c1/c2 wires around so the motor go opposite of what the hub tells it to.
  6. dr_spock
    Those strings are at an angle on the top section. Besides clutch power, I think there is some additional force applied to holding the string stud down into the castle plate stud. That amount of force is the tension force on the string times the sine of the angle. Or something like that...bad memories of high school physics...
  7. dr_spock
    Physics. Equililbrium of forces.
  8. dr_spock
    I am the opposite. I haven't had any damaged PF cables but burned out a number of PF motors from running GBCs. A multimeter is a good investment for diagnosing problems. You can use for checking voltages and continuity. The cable from burned out motors can be reused to make PF adapter cables for electronic projects and other stuff.
  9. dr_spock
    I think you can make your own if so inclined with parts LEGO currently has available. You can use Technic parts for a stronger connection. It might be a very long wait if you're hoping LEGO would do it for you.
  10. dr_spock
    It has been done before in LEGO GBCs where a ball car is loaded and pulled up a rail incline and dumped. Regular train tracks may work better than coaster tracks if your system is not a straight line. The wider space between the rails would allow more room for the cable guides in the curves.
  11. dr_spock
    Would coaster tracks work? I assume you mean one of these kinds of people mover or guided transit. 41347-53 by DrSpockFriends, on Flickr
  12. dr_spock
    The easy thing would be to power the PF motors and IR receiver with an adapter cable to your choice of rechargeable batteries type. Be it AAA or AA batteries in a 6 cell battery holder or LiPO packs. If you want to do LiPO, 2S LiPO batteries come in various sizes to meet your space requirements or runtime needs. It would be a good idea to add a battery protection circuit to prevent damage to the LiPO from overdischarging and overcharging.
  13. dr_spock
    Thank you everyone. Hopefully not too hard, Charmin are supposed to very soft. Interesting, is it really endless or supersized rolls? Pombe! You're back. That is correct. There were many complaints when some magazines went to printing on glossy paper. I have an old Sears catalogue on standby now that YellowPages and WhitePages are no longer printed.
  14. dr_spock
    Pretty and shady too.
  15. dr_spock
    Did you test the M motor with your other spare battery boxes? I think the servo motor requires a PWM control signal to work.
  16. dr_spock
    PF extension cables have a 9V compatible connector on one of the ends.
  17. dr_spock
    Excellent grain silos. Good to see you had a helping paw.
  18. dr_spock
    I believe LEGO uses polyethylene for their plant pieces. Polyethylene can be made from crude oil or sugar cane. PE is not a biodegradable plastic. It could be possible that old ABS feels harder over time due to the elastomer losing its elasticity like old rubber bands. You can use a brick separator to avoid hard fingernail scratches.
  19. dr_spock
    If you like coding javascript, you could try this: https://nathankellenicki.github.io/node-poweredup/
  20. dr_spock
    Mix of PU and PF GBC. Gotta love software. The PU part stopped working after the latest PU App update. My tablet can't maintain a stable BT connection with the PU hubs. Drops happen a few seconds after connecting. Oh well, at least there is no events coming up...
  21. dr_spock
    That information might be available in catalogue and/or ordering site for wholesales and retail accounts.
  22. dr_spock
    My entry for Category B: https://www.eurobricks.com/forum/index.php?/forums/topic/176970-sr-ch-iii-cat-b-the-great-charmin-of-el-oleonda/
  23. dr_spock
    April 620 Off the shores of El Oleonda. Pew pew. Bob, Captain Susieh, and Brutus made land. Rolling along. A deadly trap? Don't squeeze the Charmin.
  24. dr_spock
    Nice. I printed in PLA some large train wheels last year. I ran them at all our events. They seem hold up fine so far. I don't think they'll see any events this year. I am going try ABS next. Have you done any ABS prints? Some slicers have a setting that allows randomly staggering of the start point of each layer so it doesn't form that seam.
  25. dr_spock
    Fantastic build. Interesting way to cram in the train motor.
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