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Thread: Team Shakesc : Build Diary

  1. #71
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    Its late and the wine is kicking in

  2. #72
    Shakey's Avatar
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    A video of Olaf in testing. Excuse the driving, I hadn't driven it before. In live shows it proves to be a pretty decent drive setup, due tot he front of the robot it has difficulty pushing from a standstill as it just loads the front and loses traction but if it can be moving before contact it is impressive. The speed of the robot makes it an excellent rambot. Then sensorless setup seems to be fine just by following the idea of have more power than you realistically need as then it is able to startup cleanly without any cogging. The ESC's still have the delay but I noticed it is only from forwards to backwards. Backwards to forwards is instant, so I configured it carefully so 'forwards' of what the ESC thinks it is is actually forwards, this means I don't have responsive reverse and if I turn on the spot right after going forwards the wheel going back just brakes so I turn with one wheel forwards (if that makes sense). However no matter what forwards is always instantly available.

  3. #73
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    Well I've pondering the replacement for Spur 2 for a while.
    Spur 2 is running on DeWuts which although great they are sizable, heavy and expensive. For this one I am moving to Brushless. I ran brushless on Olaf but had Alien Power motors which were good on paper but not robust and not available. Therefore moving to NTM's - cheap and I can have spares!
    The wheels on Spur are Banebot customised to bolt the sprockets to them. I have looked around at lots of wheels and although Colsons look nice for the design I wanted to do would still require lots of work. Therefore I decided to make some custom wheels out of Nylon 66. This allows me to bolt the pulleys to them (using M5 rather than M3 I used before) and also screw my favourite tyre to them.
    Spur although quite compact is also heavy because of the 4mm hardox. I've moved to 3.2mm Hardox and will be bolting HDPE as an outer skin to this.
    Finally never got the lifter on Spur working and ending up modding the chassis to make it a rambot. I am determined to have a working lifter on this Sewer Snake style.
    It also feels a bit easy to call the new robot Spur 3 (although there is clearly a family resemblance). Name will be ITL ...



    Close to a rolling chassis for drivetrain testing

  4. #74
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    Havent posted for a while
    Work stopped on Spur 3. Trying to finish off a kitchen and a few other things

    Anyway my Chinese lathe in the process of making the wheels (why didnt I just buy some Colsons) ate some teeth on the Hi/Lo which is plastic
    Ordered some metal ones which happened to be on backorder
    Spent an evening stripping down the lathe to replace them
    The moral of the story is if you are buying a Chinese lathe get one with metal Hi/Lo teeth as the plastic ones will break and its close to a complete strip down to replace. In that process I found some components made out of a soft variant of Gouda and some interesting wiring.
    My saving up for a mill is going to take a bit longer as after this experience I have decided to up the budget
    At least the rugby was entertaining

  5. #75
    overkill's Avatar
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    The Sieg X3 is a nice mill with very little Gouda inside - you could even say its gouda enough . I stripped one right down and the workmanship is still fairly good on the bits you don't normally see.

  6. #76
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    Thanks Nick, looking at some of the components you produce it certainly looks like it could do the business

  7. #77
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    Its been a while since I posted

    Spur 2 with the Dewuts tends to break the bolts between the sprocket and wheel on a regular basis
    I've moved to drilling out and using 3 x 4mm hardened pins held in with JB weld. Time will tell but I'm optimistic this will hold


  8. #78
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    Next thing is Spur 3

    Been working on this off and on , trying to decide how to do the drive
    Finally came down on aluminium bulkheads bolted into the chassis.
    I will be using Vesc's but for test some good old SimonK TZ85A will do



    Need to get the thread on the wheels and internal supports, top plate support, battery box and weapons system. So almost there then !



    PS: Still havent finished the kitchen

  9. #79
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    Well did a first test with some SimonK flashed TZ85a
    Being very overpowered gives it controllability , who would of thought it

    Change in direction is good and it bunny hops. Still trying to squeeze a weapon in. hehe


  10. #80
    Rapidrory's Avatar
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    Considering that's only on 5S and in a confined space, it's gonna be awesome at full chat! What's the current weight? And are you looking into magnets for extra traction?

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