Battlebots - Jäger

    • Official Post

    Ihr braven Follower habt bestimmt schon gesehen, dass wir(=ich) angefangen habe Baubilder von Jäger zu veröffentlichen.

    Schonmal vorab.

    • Ebay 6384 120kv
    • Flipsky vesc 6.6 dual


    • Turnigy sk8 6374 130kv
    • Flipsky vesc 6.6 (single). Ersatzframe: Hellray vesc
    • P80 4:1 in Banebots Getriebe


    • Turnigy sk3 6364 245kv (evtl. langsamere Version für Säge)
    • Flipsky vesc 6.6. (single) (evtl. jive 120+ hv für Säge)


    • 12s 6000mah sls Xtron 30c. Zusammengesetzt aus 4x 6s 3000mah

    Hier nochmal für die Facebookverweigerer:

    Here you can find some pictures that were taken during the build of Jäger. We´ll start with the CAD and early build stage of the sawbot and will update from there on!

    The first iteration of the CAD model. Already at this early stage it became apparent it would end up overweight. So off to a fresh start!

    The final CAD model in an almost finished stage. "Only" some details for manufacturing had to be added.

    None of the off the shelf wheels properly fit our design. So we just made our own ones.

    The CNC router was working overtime in the early build stage (as you can see...), since we were still avaiting the Hardox profiles. Pretty much all plastic and aluminium parts for this robot were made on this machine.

    Some HDPE wheel parts fresh of the router.

    All of these parts for just one set of wheels.

    The first assembled prototype wheel.

    The same set of wheels after a lot of test driving.

    Some more small bits made on the router.

    3D printed jigs proved helpful for drilling round stock

    Motor rear support and weapon bushings. Making the bushings from thick walled brass tubing safed a lot of time.

    Drive- and weaponshafts. The chromoly steel put up quite a fight. Or the cutting disc went dull.

    Your gearbox output shaft is too short and the longer ones are on backorder?

    Simply extend the stock one!

    220lbs of heavy metal. Team memeber Jonas drove 300km (one way!) to pick up the lasered Hardox parts.

    Small teaser of what is going to follow in the next update :winking_face:

    • Official Post

    Der Rahmen besteht aus einer Mischung aus, Baustahl, Hardox 500 und Hardox 600.

    The Hardox parts ready for unboxing.

    We immediatly started assembling a "pretendobot".

    Beetleweight (1,5kg) robot for scale. And structure.

    Another angle with some more parts.

    The blades with a beetleweight robot for scale.

    The short build time led to some weird solutions. Like this cnc lasered and bended U steel profile.

    Sunlight is a limited resource in winter. But that is no reason to stop working.

    Starting to weld the first frame.

    Result after the first weekend of welding.

    One frame is welded by Ralf, the other by Jonas. Here we go over the ideal order for welding the spare frame.

    An order has been agreed on.

    The core of the 2nd frame almost fully welded by Jonas.

    Another angle

    Welding the front wedge.

    The fully welded frame with the wedge attached. Next up: Putting components inside.

    • Official Post

    Bisher hatte ich immer normalen Schweißdraht für Baustahl verwendet.

    Für dieses besondere Projekt haben wir auf Samys Empfehlung E309 Elektroden bzw. Schweißdraht verwendet.
    Zumindest ich fand diesen Draht deutlich schwerer zu schweißen als den normalen. Meine ersten Nähte damit waren definitiv keine Glanzleistung und ich hatte stellenweise überlegt auf den normalen zu wechseln.
    Von Jonas habe ich nicht von solchen Problemen gehört.

    • Official Post

    Ich habe mit E-Hand geschweißt.
    Von der Verarbeitung her habe ich keinen großen Unterschied zwischen den E309- und meinen sonstigen standart Elektroden festgestellt.
    Die E309 scheinen etwas besser für Kehlnähte zu funktionieren, wenn man Kehlnähte nicht gut kann... Dafür bleibt die Elektrode beim zünden aber auch deutlich schneller kleben als die "normalen" (habe leider die Bezeichnung von meinen vergessen). Eine Zweitzündung ist mit den E309 auch schwieriger als mit den anderen. Die musste ich immer etwas abkratzen an der Spitze.
    Ob es hält werden wir hoffentlich noch testen können...

    • Official Post

    We totally forgot to explain how we sttled on the concepts for the robots. Each of them is based on a design, with which we had success in the lower weight classes. This is Surgeon, a former top contender in the german and dutch 6kg class.

    Nowhere near complete, but complete enough to spin the wheels.

    Ich war zu blöd das Video in die Galerie zu integrieren, aber hier die erste Fahrt aus eigener Kraft: an 4s, gleichzeitig gefilmt und gefahren

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    The pulleys had been outsourced and they did a really nice job.

    And the motor pulley

    Chinese motor labelling doesn´t make any sense

    Weapon gearbox(-es)

    Applying proven beetleweight build techniques to big robots: No need for battery mounts if there is no space for them to move anyway.

    The finished machine!

    On the way to do some testing. Lucky coincidence it perfectly fits inside the car.

    Testing hasn´t always gone smoothly. Don´t worry, this issue has been fixed and it is running reliable now.

    The status of the robots when we were informed about the postponement. Some test footage to follow on sunday.

    • Official Post

    In meinem/unserem Fall ist das Problem, dass wir nicht genug Platz haben um daran zu arbeiten. Für ein paar Wochen kann man sich da mehr ausbreiten, aber ich hab gegen Ende schon gemerkt, dass die Lage angespannt ist. Der Bot liegt daher zerlegt im Keller. Aber ein paar Ideen hätte ich um ihn zu verbessern.

    • Official Post


    Andy macht jetzt mit dem Baubericht weiter:

    Quote from Jäger

    An overall view of the finished CAD. It was originally very different to this, but once we got the good news that we had been accepted, I decided to redo the CAD almost entirely from the original design which was a welded steel structure, to minimise building time since i was on such a tight schedule, only having weekends to work on the machine whilst at university. This factor along with realising how good value outsourcing machining to China was, led me to going down the simple aluminium billet route!

    Quote from Jäger

    A second view of the CAD with the lid partially visable, nutstrip was used for non-structural parts and internal mounting for simplicity. Since the robots were going to be weighing less than the opposition I really wanted to maximise the weapon effectiveness by keeping outer armour to a minimum, so all the weight could go into the core chassis and the weapon itself.

    Quote from Jäger

    First part manufactured! Unpacking this once it arrived was pretty fun. I decided to dump a lot of the robots weight allowance into this part since it would be holding the weapon as well as taking the brunt of the punishment from heavy weight spinners, how long it lasts (and if the mounting points are sufficient) only time will tell!

    Quote from Jäger

    And a view of the underside of the part, where the weapon shaft and weapon motors mount to.

    Quote from Jäger

    Steel weapon shaft and weapon hub manufactured at the same time as the main body billet in China, in early January

    Quote from Jäger

    Steel weapon shaft and weapon hub manufactured at the same time as the main body billet in China, in early January

    Quote from Jäger

    My work area got pretty full of exciting parts by the time I got round to looking at stuff at weekends, and as expected space became quite an issue

    Quote from Jäger

    While waiting for more important parts to arrive I decided to add epoxy to my first set of motors to battle harden them. The weapon and drive both run off sensored 6384 outrunners of varying kv.

    • Official Post

    hätte nicht gedacht, dass bei den kleinen Outrunnern die wicklungen verklebt werden sollten. Erforderlich oder einfach aus Sicherheit?

    Unbedingt nötig, das Problem hatte ich schon bei meinen Feather wer sich Erinnert...

    es gibt da Erfahrungsberichte aus den USA bei Facebook, die meisten kennen ihn Robert Cowan, da wird in das Epoxid Harz aber noch gemahlener Glasfaser mit eingearbeitet, damit das Harz nicht zu brüchig wird, auch wichtig die Glocke zu bearbeiten, also wie beim Bosch auch hier die Magnete zu verkleben, aber seht selber...

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    Bei Sokar hab ich das so umgesetzt, beim Heavy sollte man nicht drauf verzichten gerade bei diesen Gewaltigen Einschlägen von Spinnern, siehe Bild, das war im Grunde nur 1 Treffer ohne KJ Limit in England und mir ist der Komplette Bot im inneren zerbröselt!