PKW

DAY #1: LIFTY Full description: this small robot is one of the four 500g bot made to be easy to rebuild, simple but enough though and powerful to look like a mid-level bot. all the 4 -ITY team bots have 2 M motor for driving and mostly geared down 1.6:1 to gain a decent power and leave speed/power values to the wheel diameter: bigger wheels are faster with less pushing power. despite one main goal was to keep robot on 3 channel and 2M motor plus an XL one for weapon only two of them respect this rule and are LIFTY and FLIPPY. LIFTY chassis was designed to be modular so that more than one weapon can be attached it to show how different main weapon influence the fight regardless of driving, here an example with a pneumatic flipping arm against FLIPPY: also the drive is quite powerful and heavy reinforced to be the best for a modular bot, the only weak point are the wheels that can't be connected with a 5,5 axle with mid stop and it may happens that sometime they fell of after repeated hits or under a grabbing weapon short recap of statistics: name: LIFTYdescription: modular chassis with lifting forkssignature move: LIFTERweight class: 500g motor used: 2x M for drive, 1x XL for weapon drive: 2WD on the front and 2 cater wheels on the backnotes: despite being a lifter it is not really able to full lift the opponent but by going under it and pushing with the additive weight it can easily lift and flip up to 1kg bots! PHOTOS: 0.5 kg weight BONUS VIDEO LXF FILE FOR LDD lifty.lxf

Despite BB and receivers protection being both 250mah (unless using v2 receivers that has a 750mah one) ir power consumption and circuits will result in a less power opupts so you're right I have both sbrick app (with custom profile) and game controller but it is too weird to drive with, I really prefer lego remotes and a sensible feedback Same thing as before but I can't understand the problem, remember that remote customization could be really useful on logo battle bots and also while controlling the switch make sure not to stall the motor and to prevent motor inertia from moving the switch to neutral when you release the remote lever (so an end stop and a fraction gear could be useful to control "power" "stop" and not clockwise, center clockwise and stop)

About the steering: most of real bots (and most of mines) uses skid steering to save weight, have a better manoeuvrability and also have the advantage of a pivot steering (so turning wit hour have to go forward/backward) that is really useful to avoid pit or hazards in the arena, but this kind of steering has some cuonts: 1)caster wheels can stuck into something and prevent you to streer 2) if your CoM is too far from the powered wheels you may slip and drift (and this happens in lifty) 3) it is easy to be lifted and have your powered wheels not touching the grounds (again if you are not careful you can lift you wheels up with lifty forks and need some time to free yourself) As for the lifter I had to choose a compromise of speed and tour and the result is a good controllable ( a fast lifter won't stay on the ground but always lift you up due to being difficult to control), and what I gained what a pretty good torque useful to lift or "carry" pretty mush anything (remember that this bot is 500g class and has also a main constructive goal I'll explain in the post). Last thing: the "go under the opponent" ability: 1) it relies on having the thinnest brick possible as arm 2)faster bot are difficult to control so it is difficult to have a good lift even with a good arm 3)actually lego bot has a lot of holes and bity lifting arm is designed also to penetrare and lift from internal holes in order to make more damage Thanks you for the feedback, mod that lifty is one of the most simple bot there ;)

I was really so busy that is a long time since i created a folder on brickshelf, and now it's time to add my remaining 8 bot: i'm also aiming to create a lxf file for each, but currently waiting for the first folder to become public. What i want to do is to keep this fist post simple with robots thumbnails, link to the future reply about them, descriptions and lxf files, let's start: Really hope that all the files and photos that i'll put there can inspire some TC11 competitors, unfortnately you can't fight bot in the entry video but i will really like to know how a fight between your bots and mine will end (despite my bot being ruled by different and more restrictive rules). Bot-focused replies will be posed one every day starting from tomorrow and then this first message will be updated with thumbnails, lxf files and more info, i'm doing this because i'm progressively dismantle all the robots and i want to keep them at least in digital form (so i'll have more pieces for my new ideas without loosing the previous ones). i also really want to thaks LRW (lego robot wars) group for the support that they gave to me while i was building and posting updates there: https://www.facebook.com/groups/105109289523663/?ref=bookmarks in order not no make this topic only a bunch of writings i have a small video about the first bot that will be showcased tomorrow (asap) so here all the robots: name: LIFTY description: this is the 2nd of the -ITY team, a series of simple robots made to show the archetypes of combat robots and also easy to replicate, they also fight each other but the winner wasn't this one. signature move: LIFTER weight class: 500g notes: despite being a lifter it is not really able to full lift the opponent but by going under it and pushing with the additive weight it can easily lift and flip up to 1kg bots! lxf file: lifty.lxf bot reply link(scroll down here): click here name: BITY description: this is the first of the -ITY team, also the most complex featuring a jaw that can be opened and rotate, it represents grabbers or control robots that aim to grab the opponent and push them into the PIT of oblivion due to the use of lipo BB (i have only one) and the excessive weight (700g) it didn't compete to the secret -ITY championship signature move: CLAW weight class: 500g notes: 4x4 transmission is really powerful but has a lot of friction while steering (even at smaller weight class) so the battle position of BITY is with the claw inclined down and front wheels lifted up and not touching the ground lxf file: bity.lxf bot reply link: click here name: FLIPPY description: 3rd of the ITY team it is a spring powered flipper! inspired by diotor this bot relies to a winch mechanism that is able to load and relase 4 9398 shock absorbers with only one motor! signature move: winch reloaded-spring powered FLIPPER arm weight class: 500g notes: unable to self right was defeated by lifty on the -ITY tournament lxf file: flippy.lxf bot reply link: click here name: CARBIDE description: replica of uk robot wars competitor carbide, grand finalist of series 8 and champion of series 9 signature move: horizontal spinner weight class: 1kg new technic motor used: 2x M for drive, 1x 9V motor (745699) for weapon drive: 2WD and can drive even if upside down! notes: the side armor is really tough but can be detached from th main body, also the bar has a quite good punch but luckily not enough to break lego pieces, it can remove armor and exposed wheels. also it is driven by an sbrick receiver so it has the advantage of PWM motor controls and no line of sight needed, may also join 3-robot matches due to not providing interferences with IR lxf file: carbide.lxf bot reply link: click here name: PULSAR description: again a 2016 competitor, smaller and faster than carbide, but equally lethal signature move:SPINNING DRUm with double single tooth weight class: 1kg replica new technic bricks notes: it requires only two channels to be controlled because the spinning drim is always one and a rubber band belt prevent the motor stall name: WITCH DOCTOR description: this replica is from BATTLEBOTS! unluckily i can't replicate the purple/green color scheme but this time i used old technic bricks so it is completely smash-able! but mind that its deadly single tooth disc smash bot before they can do anything signature move: single tooth SPINNING VERTICAL DISK weight class: 1kg replica with system bricks notes: my first inclined wheel drive (with chains) that really helps the bot steering even if 4x4 with all the wheels on the ground name: CARDIAC II description: the first fan designed bot that i motorized, it will fight witch doctor later this moth (hopefully) and it is armed with a deadly axe that can stop the 2000rpm disk of its opponent signature move: fast AXE weight class: 1kg replica with system bricks notes: it is the biggest bot i've ever built and has a pretty advanced weapon capable of rapid fire with a single M motor name: KILERHURTZ test chassis description: this poor bot was never finished (and used to test all other bots weapon) due to the armor of the original 100kg one being really difficult to replicate, but it's weapon really reflect the power of a 110kg machine signature move: rubber-band powered gearing reloaded AXE weight class: never finished notes: it can be operated with a full auto reload system and a tap firing button from the sbrick APP

can say that motor can't reload (in a reasonable time) mechanism that flip good more than 2-3kg with only one battery, about lifting i think therre is no problem on making a 4kg lifer with those sizes and more than one battery box (but forced to 2wd due to big dimensions), my personal record is a full flip (so directly updise down) on a 1kg robot, i'm not sure if i will try to beat this or build my most deadliest spinner....

Icewave always impressed me, are you planning to but motor and weapon BB on the top of the build like the real one? it will be really awesome, also good luck with the blade it is really large, but you had a good idea powering the blade with a separate BB, RC motors has got a really high power consumption, the only way to make a bot with a single BB and one of them is hack the battery box thermal cut-off, but the buggy motor is so powerful that its consumption can melt cables if stalled, don't try! Looking forward for progress!

Maybe it is just because of everyone not thinking about being huge things that require more than 1 battery box to move and have enough energy for all its motors, but yes since more than 2 receivers are allowed there is no sense on limiting battery boxes because most build will just require then to move/act properly What about my ide of a video where I can make my entry fight other bots? I already know I can show their building progress in the topic but I can show them in the video? Also I know videos are better if short, but inserting my video in a play list of flights (about the entry) and saying "if you like the entry and you want to see more of it in action you can just let the play list scroll" it is ok? The embeed video will be only the real one send the other will only appear on entry topic

For the image i'm sorry, I always forget the size of my brickshelf folders, i'll edit with the right size one ASAP. For the topic: I was asking because I haven't read anything like "the entry topic must contain only info about the entry" but only "you must have an entry topic that you info about you entry" (sorry for not quoting real rules it is hard from phone) so I thought it was better to check: So all this means also that the video that has to "show the bot signature move...." can't be done with any other boy featuring it in order to show real weapon power or a real fight? Can I make a single entry topic and then use other bots to make the video about that entry and how it can handle a real fight?

It is ok to have the "entry topic" showing building and progress of two robots and then make a video of the two fighting and choose as real entry only the winner? so "likeliness to win a battle" will be sort of less arbitrary remember to put receiver so they can receive signal while driving on both side. also you'll remember to drive backward with reverse steering while flipped upside down, or just make an invertible remote ;)

Muhahahahahahahah that's what you think... Or maybe to fights... i really hope my idea will work Yes that is a really bad thing :( hope to show everyone that big bots won't win a battle ever Sry for double posting but i can't insert a quote on the edit and i haven't noticed this post before: EDIT oops, it worked! my bot will fit that rules except the use of mostly old techinc bricks, i love to build with 1kg limit and a reasonable size for electronic and the pit to be effective

don't worry it happened to me lots of time! especially with high power drivertrain for lifter or drive and 2k rpm disks, you have to mind that combat robots are always combat robots, not really a toy ;) jim it is too difficult to apply a weight limit like in real competition right? it will be really fun because i may found some design to use in my videos but i have 1kg limit, hope most of ppl will keep in this limit that is the best not to stress a battery bot and have decent pushing and weapon power (even if lego pro builders never aim to performances and that will mean max size plenty of things and detail and no ability to fight -.-)

that's not always true, as stated in the video made them a little bit underpowered not to break pieces because it is 100% possible to make a kinetic weapon that smash robots (even if technic) but that will seriously break/scratch pieces so i avoided that and i aimed to make weaker armor (not enough weak unluckily). for the system based bots you can watch ochayedonalds videos on youtube, there are tons of bricks flying apart, i have just built two with that system and i hope to film a video as soon as i finish to build the arena:

thanks for the tempestive reply, hoping to be able to build something big before the deadline because i'm already planning to build an arena for my next vid and i may use it for the entry

yes exactly yes, a bit tired of always making new design (i've almost build 20 of them and i loos almost everything when i have to dismount one to have piecces for a new one) luckily i have a bot that was never posed waiting for this topic and another bot that was never build for the same aim, but again i have no time to make LDD for all the other bots to save them and i don't want to llos al the work i did 3 bots are lacking here (th secret one plus witch doctor and its opponent) disky(top right) is dead and also 3 designs before them (wheeled scorpion, crab (i've used them in the soccer video on my yt) and a pneumatic lifter that was awesome) while ribaltolando and tracked scorpion still alive in digital form (they are from LRW tournament #1 video)

are you sure it is not the BB that is damaged? try to accelerate by repeatedly pressing A button and see if the car slow down after some acceleration, it can be the thermal cut off of the BB that is old and cut the current at a lower power consumption than it should be (well.. 4 m motors are a lot) even try to go forward/backward with only the BB switch and see if the problem appears again, if yes change BB (but not batteries) and try again with the sbrick.

hi all, some months ago i made this video of lego battlebots, and now i'm posting it there because maybe you could be interested also for TC11, you'll find all the bot info in the video but i'll clone them here too, hope to bring up a brickshelf folder asap for the two bots (but i have to rebuild them due to pieces and electronics being used for witch doctor replica, cardiac two, fanmade design, killerhurts and recyclopse chassis, and other 3 500g class bot an grabber a lifer and a flipper) PULSAR weight: 700g size: 23x27x9studs weapon: 73g spinning drum with two single teeth 1900rpm strenghts: really effective wedge shape used to go under the opponent and lift them with the drum energy weaknesses: the drum isn't enough fast to launch the oppnent on the air, wheelholders may break off easily, weak wepon belt CARBIDE weight: 730g size: 32x32x9 studs weapon: 84g spinning bar 750rpm strenghts: great power and though armor, effective rear wedge weaknesses: the armor can e warped or bent and increase friction in the drivetrain, hard to control, high battery consumption here a photos from Ellis (pulsar builder) about size comparison here the video: NB it is really long, if you want, after presentation, you can skip to 11:02 to skip the fist fight (a bit long and boring) and save time without losing the most of the action! i'm keeping editing this with photos and videos from my twitter, it is hard to find them back but i'll try: CARBIDE PULSAR

hi all, i've just seen this topic right here and i see it was started on monday, since i main build lego battlebots i was building a witch doctor replica before this post and i posted so e photos on my twitter before monday, it is legal to enter it in the competition?\ edit, first time i've shown one piece of the bot was 12feb first tme i've shown the moc was 15feb.... it is.... new and not even fully finished edit2 whaat?!? why prices are sbrick for who already own one and ir for who already own them? shouldn't be swapped?

really nice! but i don't think i can join that (russia is away...), have I any chance that some rare will race with a chassis built by me? maybe i can build one and ask for that right?

Yes I also thought that, the "no load" (or more accurate "really low load") test makes me see that there is more or less a 4% difference lifting speed with the low weight of the forks(i was expecting the worm gear lifter just a bit faster), so i test the static friction (removing the motors and the worm gears) and the gearwheel-only mechanism has 3-4 more friction than the 5:1 gear ratio in the other lifter (that has 2 gear reduction), so i think it didn't affect the test. anyway my test don't want to take out numbers but only to show that the difference between worm gears and gearwheels is noticeable and high because not everyone knows this (while i came out with a 50% loss with more or less 0.5 kg mass other with different mechanisms found a 40% loss, but they used a worm gear and a gearwheel vs a big gear chain).

I think that the best way to make an auto-locking system is to use motors that has a good embowered turning resistance so if they are geared down in the correct weight they won't be back turned from the weight lifted, anyway this means that maybe you can't lift all that the motor can expecting that the locking function will work in any7 case, because the unpowered torque is really lower than the powered one. there could be implemented some auto locking mechanism in the wire, or something like the one used in catapults but they are quite difficult to build in a reversible way.But as I said i think that the space saving of worm gears and the ease of the worm gear mechanism will compensate the lack of outputed power.

thank you for your clarification! only one thing: the original name of the greek letter is mi, not mu, why everyone spell it wrong? (this is the only thing i learnt from my classical liceum ahahah)

all that you are saying is strictly linked to what bonox said: there is so many friction in lego worm gears that the seems to lock the power transferring, but real worm gears, have a good lubrification and move particular gears like this, with rotated teeth: so their friction is so reduced that it is also possible to invert the torque transferring: for example hypnodisk on robot wars has a worm gear mechanism to power its wheels and it hasn't got the "handbrake" problem that lego one cause. The reason that why i haven't talk about the lock on place function is that i'm making this kind of video for a Lego robot wars group, and it demonstrates that also at low gear reduction (5:1 instead of the 40:1 that is possible with a worm gear) the unpowered M motor resistance is enough to power a winch without slipping problems. IMHO the main goal of worm gears is to save space and to be easy to reinforce, in fact it is difficult to make a tough gear chain without making something really heavy and big, they are also useful while using mindstorm for the lock in place function, but mainly because the give a 1:1 ratio with the motor rotation and the gear teeth moved. Thank you!

HI to all! the video itself explain all I want to say about the difference between the same ratio obtained with worm gears or with normal gears, the first are really useful in lego and allow to build really particular stuff, but.. they have a lot of friction. i was really surprised from how much difference there is in the power output of the two mechanism, and it is directly proportional to the force the system has to generate: i test them with an !kg weight, and while my version works fine, the worm geared-one fail to lift it! thank you for watching, hope that this video will help someone of you to make better mocs!

I built this particular suspension system to have a good 6x6 trial truck with steering front wheels, i think this is a "7 link double live axle with pushrods" am I right? :laugh: anyway it works really well especially because you can lift the 1st or the 2nd axle alone and the truck remain leveled