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hi guys im adam 25 from nottingham
please have a look at my first axe robot below
some standard equipment and some custom please comment on this mark three version
took along time to get the weight down within spec
sorry no pics yet will not let me upload file to large any ideas thanks not a computer fan!!!!
Most people upload to Photobucket then link the photo using the img link from under the photo. Will make more sense when you use it yourself.
if you open the photos in paint and re size them to 35 x 35 instead off 100x100 then they will upload
Had a good try, hopefully this should be the link, thanks
http://s1323.beta.photobucket.com/user/ ... rary/robot
http://s1323.beta.photobucket.com/user/ ... rary/robot
this link should work, thanks for ideas, please comment
It looks very nice, how well does it drive?
Control from cheap esc not to bad very sensitive when turning, full speed quite low as only running 12v but axe control via 30 amp elecrtonize (not sure on spelling) seems to be fine.
ebay esc do cut in and out on heavy imnpacts looking to remedy this by removing all small connectors inside and direct solder if not just replace with my 2x10 sabertooth should be ok at 12v with drill motors
Looks very good! Have a look at botbitz website (www.botbitz.com) if your interested in some new speed controllers
Looking good. Just finishing off my axe bot. I looked at those motors for the axe (in fact I bought them) but ended up with Gimsons due to the weight
I have tz85a's for drive which I hacked myself - nice and light, work pretty well. They do have a bit of a dead zone around centre
Thats really cool, hope to fight it some point soon :)
Impressive! Videos please, be great to see it in action!
thanks for comments, please see the link below.
http://s1323.beta.photobucket.com/user/adz600/library/
Sorry for how long the video is, I couldn't upload the edited virsion due to file not supported.
Thats awesome :D We need to make ourselves an electric axe for ScotBot demos :proud:
I like your biscuit tin :proud:
That's very awesome indeed, nice work :)
Got most of the parts needed, so could be done. I'm still dreaming of making a Bosch 400 powered axe robot but that'll take much more development. A Speed 900 or drill motor driven axe, on the other hand, is more achievable - once I've scored 'build arena walls' off my to-do list :lame:Quote:
Originally Posted by Anttazz
What mixer are you using for the drive? It looks to me that its slower forwards than when turning, which happens with some mixers, some will knock off 40% off the forwards/backwards.
mixing using my dx6i handset no mixer within robot, but i agree does seem slow
might try my 2x10 sabertooth to speed check
turn it off of the TX, you will find it goes quicker.
hi all just though i would list some of what was used and some probs i had
new photos of insides also uploaded
http://s1323.beta.photobucket.com/user/ ... rary/robot
3 version this final version has plastic 10mm base not 3mm stainless, large cim 21v axe motors have been replaced with large 750 mfa motors( 41w quoted but are loads bigger and better built then drill motors must be quoted at no load ? )
12v drill motor drive
100mm robo whells
4.1 mfa axe motors
30 amp electronize axe controller
2 x cheap ebay drive contoller ( replacing with spare sabertooth 2x10
3700 12v batt
ar500 spektrum reciever
carbide tipped axe from joy minning cutter
15mm side armour
3mm stainless wheel armour and axe support
axe assy alone weights nearly 4kg (no motors or frame included)
weight was the biggest problem all the way whilst building, some test as shown look good, robot does self right
any one near by bingham notts for a bash around to try out its electronics in pushing etc
please comment thanks adam
No toy still lives, axe and mounting all fully repaired after drumroll2 and ls4 had there way, all good fun just about to start running tests with the axe motor assembly.currently run at 12v but ratde to 18v so three tests
12v power ,speed and axe time
14.8v " "
22.2v ""
hoping to keep same axe assembly and motors just use more volts
Well done on your build! Looked great at the champs and stood up to some serious hits. Looking forward to seeing it next year!
Thanks james , had great fun cant wait to play again
Just been doing some video analysis for a start point on the axe speed and therefore power, 13 frames at 30fps from start to ground, thats 0.43 second start point will video 14.8v and 22.2v and do the same fps test.
simple and basic but is accurate to 1-30th second not bad
Just in the process of basic repairs ready for sunday testing, also designing my team logo,
TEAM NO TOY
OR
NO TOY ROBOTICS
and images etc some are looking quite cool tryed to upload but used powerpoint and file is not accepted
No toy axe test at 22.2v went well, had multipe test surfaces and may hits. axe assembly looked great with no jams or damage just motors building up alot of heat after 6/7 mins of testing should be ok. axe time has fallen from 0.43 to below 0.3 thats 31% decrease in time to impact. looks and sounds lots more damaging. in slowmo no toy picks up at least 100m of the floor when firing the axe its wasting energy but shows the forces involved will require a body redesign to harness that power.
still might try those speed 900s
100m, that's quite a distance ;)
My axe tests have mostly been with the axe unit clamped to my workbench, but I noticed a similar thing when I ran one test without it clamped. Common occurrence with axe weapons. Not sure how well it would work, but maybe having magnets in the base of the machine will help keep it on the deck and reduce the amount of wasted energy, although that would only work for Robo challenge events.
Sounds like a nice improvement in any case though; you able to upload a video of the 22.2V tests?
Sounds really good! What's the length and weight of the axe head?
Little hitter get around the jumping when hitting other robots by having a slight ramp at the front that gets under the other robot. That keeps the front on the floor and so doesn't waste so much power! Might be worth looking I to doing something similar.
I don't know if it would work but I've just bought some more of these electromagnets.
http://www.ebay.co.uk/itm/2711813511...84.m1439.l2649
They're the ones to hold fire doors open (rather than ones to keep doors closed which have roughly 1/2 the pull) they'll pull 40kg's at 24V drawing minimal amps (2-3) I was wondering if you could wire it up with the weapon motor such that as soon as you fire the axe the magnet engages sticking the front edge to the floor, then releasing as soon as the axe was down?
Just an idea. Splinter was pants this year but I was really please with how the electromagnets worked, with a little tweaking I think they could be used effectively in a number of machines.
The magnet comes out of the housing and is 50mm dia, about 30mm deep has a large threaded hole in the back (M10 - 12ish) weighs very little and requires nothing more complicated than a 24V supply to generate the magnetism.
Surprisingly powerful beasties these.. I run a small kitchen in a care-home part time, alongside my consultancy. So I experience them most days. Can't budge the door.
Quick poorly edited video of the 22.2v axe test,
http://s1323.photobucket.com/user/adz600/slideshow/
sorry wrong link i hate computers
http://s1323.photobucket.com/user/ad...d39f1.mp4.html
try this one
That's got some nice power. I'd be worried about fighting that.
I've said it time and again, but maybe not to Adam; Axes need something under their opponent to deliver the full force through the opponent. Otherwise it wastes a lot of energy making the robot jump.
What would happen if the shaft of an axe were slightly flexible? Surely, it would store a little energy on the downward path to be released on impact, but also provide some shock absorption? You'd have to work out how much flex would be efficient: too much and the weapon loses power of course.