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Rob Team Rotwang
Joined: 19 Jun 2004
Posts: 294
Location: Victoria
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Bender mark III drive motor and wheel
One change is we will be using lighter colsons 5 x 7/8 rather than 5 x 1/4
I'll point out the hub adapter, that particular part is the first Rotwang robot part to be designed in CAD before we make it out in the workshop, everything else basically comes straight from Gary's head into real life, besides the odd occasion when a concept is scribbled on a serviette or used envelope.
http://i23.photobucket.com/albums/b389/762378/benderdrive.jpg
Benders NEW frame so far, what you see is about all that actually exists in RL and I'm cading it for experience, or you never know we might even draw the whole thing in CAD before the rest is built (not looking foward to drawing the bike tire).
So far im on the steep end of the learning curve when it comes to joining/constraining parts in assembly, the box that's not looking attached has been difficult, its a bit fussy because the top and bottom boxes aren't parallel...I got one side on though, unsure how...anyway, its taking some time. Also I got no idea how to constrain tube sections, so any advice using Inventor in that regard would be helpful!
http://i23.photobucket.com/albums/b389/762378/benderframe.jpg
Last edited by Rob Team Rotwang on Wed Oct 07, 2015 4:09 pm; edited 4 times in total
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Fri May 22, 2009 6:46 am |
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Rob Team Rotwang
Joined: 19 Jun 2004
Posts: 294
Location: Victoria
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i was really happy to be able to use bender. fun robot to use, can deal some real damage. on the upside the weapon was effective, spun up noticeably fast with the 400w motor. didnt need to use the spare disks. the drives worked well after rate limited with the sidewinders. could have benefited from more careful preparation, so bolts didnt fall out of the weapon hub and maybe something to stop the weapon motor wriggling out.
lost first fight back after all those years. fighting NC. benders dual 25 amp Sabretooth over heated and turned off. dad bought the sabretooth many years ago and never used it in fear of it blowing up but fit it this time with a switch mode eliminator and extra heat sink. thought this would by pass some the problems people had with them. but it just heated up and stopped. scorpion xl still needed rate limit. knocked a few bits of aluminium off NC and put a few gouges in here and there but didnt disable him. Thought id bend a disk in this fight but didnt. brought all the spares for nothing.
won fight but had some speed control issues with fight against kojac but more intermittent than the issues with nc. had to rate limit the drives afterwards. still more than enough speed at 80%. bent his plow up pretty well, lifting winch and drives were disabled but repairable.
won fight against not so plastique but had the bolts rattle part way out of the weapon hub. fights in 2 parts because they had to unstick. wiring was a bit hot afterwards. i thought there was just bits of seans robot stuck in the weapon which might clear so didnt totally give up trying to use it during the fight. seans come back to steel frames seemed to be as sturdy as previous bot Born to fail when versing bender. re arranged not so plastiques lifter.
https://www.youtube.com/watch?v=d7CKEoD9Xv0&index=9&list=PLCw5EpJWmv1k3ZftAkl-zORrzFhEjf-Mg
https://www.youtube.com/watch?v=3r38crURtGw&list=PLCw5EpJWmv1k3ZftAkl-zORrzFhEjf-Mg&index=20
lost in the semi finals, weapon belt came off when motor half fell out in the fight with angus's roadkill. i had things under control until bender fell apart. nicks warning roadkill can get hit and wont die came true for us. took a lot of hits, bent its prongs a little. wacked another hose clamp on the weapon motor for the rumble. but had to make the belt tigher, previously it ran a bit on the loose side. oh and last but not least the gearbox aluminium housing broke and the wheel fell off.
multiple things happened to the weapon in the rumble
i was enjoying quite a few good hits, think i belted everyone, trying to avoid any friendly fire pami had hydra and dad had skeletor.
tried to make up for not drawing mr mangle in the rounds and lined him up a few times.
mangle got underneath by the looks of the belly pan dealt a hit right under the motor probably loosening it from the hose clamps, that accompanied by a few aerial jumps, landing on prowlers saw at one point.
bolts in the weapon hub came loose and could be what made the weapon fry. weapon wouldve got jammed and the belt was a lot tigher this time.
weapon motor ended up on the floor getting kicked around by skeletor.
very cool pov rumble video by nick
http://www.robowars.org/forum/viewtopic.php?t=74&start=7125
http://www.nswrfc.org/Nick/melee.mp4
rumble video
https://www.youtube.com/watch?v=U_o3psl9fDA&index=19&list=PLCw5EpJWmv1k3ZftAkl-zORrzFhEjf-Mg
few mr mangle marks on the disk here
dent in line with the weapon motor
_________________
My combat robot
Robowars on YouTube
RotwangRobotics
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Fri Oct 16, 2015 5:24 pm |
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Rob Team Rotwang
Joined: 19 Jun 2004
Posts: 294
Location: Victoria
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2018 Robowars Brisbane
Bender 4 and Bender 3 and although it was hard to pick it Bender 2 was entered aswell sorry Bender 1 you were left at home.
Bender 4 got a big KO hit from Glens Obliterator, quite remarkable the damage inflicted by one hit to what we considered pretty impervious, car leaf spring armor. But Glen keeps breaking boundaries like that, ever since the early days when he was putting his Nicads in the fridge between fights to cool them down. Glen knows how to push the limits. Demon was probably the first vertical spinner to make a robot hit the roof. Might've even been one of ours receiving that hit Bane? I think against anyone else that car leaf spring armor would've stood up pretty well. Now bender 4 is retired and bender 3 is relied upon to take the team through to the finals.
Bender 2 as stingray had a great matchup against the new Zealand team and some spectacular highlights were generated, i remember the comment from the new Zealanders was like we've never fought another robot that takes that much damage and keeps moving. we had to stack you in the corner to beat you! It took a great bit of damage and went out in a blaze of fire. how every robot should retire. We wont be bringing stingray out anymore that was his last hurrah.
Bender 3 made it through day one without a loss, fought some new bots that havent competed before, some fights didnt go the full 3 minutes, some were fought with a motor hanging out the side, fought our friend from Victoria and took his weapon out with one hit, broke richards speed controller twice hitting, that meant i fought richards drumbot killeniumfalcon twice. eventually facing upto the chance of fighting the new Zealanders, here i was hoping glen would beat dream crusher and take on bad blood, glen looses to dreamcrusher through some unfortunate high siding after one of the most spectacular ke fights ive seen. those kiwis build a mean robot.
the last 2 fights against the kiwi's naturally didnt go the full 3 minutes and in both instances they incapacitated, the kiwis put 100% into weapon and dont compromise at all, so it was only by turning them over that i could win those fights as bender 3 had a few issues by that stage. ie bolt came loose holding the A frames together, contributing to the crack in the frame, frames from 2009 and done a few events. im not sure if the bolt came loose when the frame snapped or the frame snapped because the bolt came loose.
lost a motor in one of those final two fights.
the earlier fight where the motor was hanging off the side was just a pit mistake, not twisted in with wire.
apart from that no broken electronics, no belt failure, the disks werent made to last long we expected the hubs to break bearings so we brought heaps of blades. i was using a lot of bender 4's blades up by the end. and i had to go in with a long bar when i really didnt want to use that against the kiwis. but that was all that was left.
too short of a bolt in the weapon bar was a big problem, needed a little more thread.
really happy with the robot, would like to put it back together and maybe keep it on the side lines for when matt wants to come to an event. chassis could do another few fights we're just getting low on reserves of that right angle gmc gearbox. so i was planning on making a beefier version on the cnc machine when i skilled up enough.
started talking about a bender 5 straight away. with glen pushing the arms race we needed something to take him on.
so the way to beat a horisontal spinner is the one with the biggest blade wins. i put an offer to buy his bot if it became available. but as that never eventuated we started buying parts to go with bender with bigger blade, bane bot drives and basically everything else pretty similar. we improved on the electronics with the scorpion xl to run on the 36 volt. running same 400w brushed weapon motor. little bit of hardox to improve the front apex. dads gone a bit different with the frame. so we've saved weight here and there, banebots bit lighter, we done away with spring steel and hoping to get a bit of flex with the hardox and keep the rest pretty stiff with rhs.
bender 4 become drop bear and thats another story. basically a 4 wheel bender. _________________
My combat robot
Robowars on YouTube
RotwangRobotics
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Mon Oct 14, 2019 11:26 pm |
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