Register To Comment
Page 5 of 6 FirstFirst ... 3456 LastLast
Results 41 to 50 of 53

Thread: Team Triforce Featherweight drum

  1. #41
    TechAUmNu's Avatar
    Roboteer

    Status
    Offline
    Name
    Euan Mutch
    Robots
    Robots: Triforce(HW), Elevate(FW), Sideswipe(FW) ESCS: A200S
    Location
    Edinburgh, UK
    Posts
    328
    Been doing some reading on continuous current of the focbox, looks like they are almost certainly overheating with the 60A motor current. So I will need to add a chunk of aluminium to the bottom of the one for the drum and change the thermal pad for something a bit less rubbish.

    As for the bad drive reliability, I have ordered some MOD1 spur gears, 12T and 80T, which still lets it go 19mph, but with almost twice the torque. Going to increase the wheel size from 70mm to 85mm so it gets stuck on the floor less. I am fed up trying to get belts to work right, they are very finicky and an easy target.

  2. #42
    Scarrosaki's Avatar
    Roboteer

    Status
    Offline
    Name
    Jon A
    Robots
    Bodacious Fyraan-Gaaris (AW), 2 Bodacious 2 Spurious (AW), Thunderpants (BW), RCS (FW thwacker)
    Location
    Chester UK
    Posts
    22
    that drum made a beast of a sound, but I think the real winner was the table for not collapsing

    was great to see Elevate and Triforce!

  3. #43
    TechAUmNu's Avatar
    Roboteer

    Status
    Offline
    Name
    Euan Mutch
    Robots
    Robots: Triforce(HW), Elevate(FW), Sideswipe(FW) ESCS: A200S
    Location
    Edinburgh, UK
    Posts
    328
    Just took apart the drum, the motor looks a bit burned lol. I think when it got hit the drum moved slightly and the magnets hit the stator.
    Last edited by TechAUmNu; 9th July 2019 at 19:31.

  4. #44
    @TechAUmNu
    How much grounde clearence does the robot has?

  5. #45
    TechAUmNu's Avatar
    Roboteer

    Status
    Offline
    Name
    Euan Mutch
    Robots
    Robots: Triforce(HW), Elevate(FW), Sideswipe(FW) ESCS: A200S
    Location
    Edinburgh, UK
    Posts
    328
    I think it had about 10-15mm before I am changing the size of the wheels, should have about 30mm after.

    So this is why the drum broke:
    20190710_185058.jpg20190710_174141.jpg

    I am replacing the tiny 10mm aluminium shaft with a 20mm titanium one. Also going to take the motor out of the drum for now and run it with a 15mm htd5 belt instead. It will still be the same speed, maybe slightly wider and with bigger bearings.
    20190710_221909.jpg

  6. #46
    TechAUmNu's Avatar
    Roboteer

    Status
    Offline
    Name
    Euan Mutch
    Robots
    Robots: Triforce(HW), Elevate(FW), Sideswipe(FW) ESCS: A200S
    Location
    Edinburgh, UK
    Posts
    328

  7. #47
    I also use an titanium shaft, made out of grade5. I once bent mine.

  8. #48
    TechAUmNu's Avatar
    Roboteer

    Status
    Offline
    Name
    Euan Mutch
    Robots
    Robots: Triforce(HW), Elevate(FW), Sideswipe(FW) ESCS: A200S
    Location
    Edinburgh, UK
    Posts
    328
    The taper rollers are probably overkill, but they are much longer so less likely to bend shafts.
    66524224_2392564577732728_8819172046152925184_n.png66609907_365487484155193_5594416617841754112_n.png

  9. #49
    Taper roller bearings are a good choice for spinners, i always using them for this purpose.

  10. #50
    TechAUmNu's Avatar
    Roboteer

    Status
    Offline
    Name
    Euan Mutch
    Robots
    Robots: Triforce(HW), Elevate(FW), Sideswipe(FW) ESCS: A200S
    Location
    Edinburgh, UK
    Posts
    328
    Finally finished machining the aluminium core of the drum on the lathe and got the bearings fitting.

    20190715_201716.jpg20190715_213232.jpg20190715_220459.jpg
    Now I need to put the teeth on and that bit is finished. Then make some new end supports and finish the shaft.

Register To Comment

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •