Hello, I am Mega Masher, and below are some pictures of my robot, Pulverizer. It is a melty-brain fullbody spinner that fits within the kilobot and beetleweight classes.
Printable View
Hello, I am Mega Masher, and below are some pictures of my robot, Pulverizer. It is a melty-brain fullbody spinner that fits within the kilobot and beetleweight classes.
I am also building a featherweight version, but am unsure as to which motors i should go for. I need 1to2 horsepower and i would need 2 of them. Any replies welcome.
You the robot spins on the spot but can still translate across the ground whilst spinning?
What are the motors for? Drive?
You may be able to find something here... http://www.robotmarketplace.com/prod...tors_main.html
Once you know what you want you should be able to find it in the UK rather than ordering from the US. Though 2 HP is a lot of power!
Thanks for the reply, the motors would spin the robot around and by varying the speed of each motor in each rotation, it would be able to translate across the arena.
experimented with a melty brain a while back. Still got the single piece 10kg hardox disc i was planning on using for a chassis. Nice idea if you can get it to work.
You will need to be looking at something like a magmotor for that kind of power for a feather.
speed 900s
gr-02's
try the robot market place
http://mobile.robotmarketplace.com/motors_main.html
you don't really get 2hp motors+ gearboxes for under a few hundred pounds.
speed controllers are gonna cost you as well and for 2hp you will need quite some batteries.
Archie... no offense but... read the thread
Neither a Speed 900 or a GR02 are 2HP motors, or 1HP for that matter.
And RM has already been suggested.
Thanks for the response, much appreciated. What speed do you think it would be spinning at? It will hopefully be quite similar to what i saw of Hornet 3. Do you know where i could get some well priced hardox?
I was aiming for between 500 and 1000rpm. Problem is that for the power you are either looking to something like a bosch 750, a bosch 400, iskra 800w, magmotor or even the cheaper ampflow motor.
For hardox I use JL steel services in Stirling. Great guys.
I thaught we already said 2 hp is waaay too much.
sorry I just thought gr-02's and speed 900's we powerful enough.
that's right.
of course your gonna spend a few thousand pounds on ampflows some few hundred amp escs and then lifepo4's.
is it just me who thinks feathers have gone a bit too far?
I mean what do I know. I have posted over 700 posts of pure bull poo.
1 to 2hp is the level of power you need for a melty brain spinner. The electronics are actually surprisingly cheap as it's all custom.
Sure some feathers are expensive, mine included but you can still win a competition with a drill motor powered machine.
It can be done but money does help do a degree, although it works even better if you spend it correctly...
Anyway... this machine gives me a headache! http://www.teamvelocityrobotics.com/...ranslation.htm
That will melt your brain! And it only uses 1 motor for the whole thing!
http://www.youtube.com/watch?v=2YB_58rUY6A
Edit - Works like this... The entire bot spins with one wheel and it steers by rapidly turning the motor on and off at just the right point of rotation to cause it to drift in the direction the operator specifies.
This still is PulverizeR.
http://images2.wikia.nocookie.net/__...ulengeland.jpg
Thanks for the replies, but do you think i should go for 1 or 2 wheels? Is this motor any good: http://www.robotmarketplace.com/products/0-E30-150.html
again don't take my advice but they look a little underpowered.
should be quite nice for the price though.
maybe look for a more powerful one though if you want it like gary says.
first thing is first, ask yourself how fast you want the robot to spin. From that work out what rpm you will need from a motor at a given wheel size. My big worry with the melty brain was that to get a decent speed I basically needed either a 1:1 or a 2:1 ratio after doing the sums. That meant a motor with a lot of torque. You also need to look at what you plan on powering the batteries with. Ideally lipo at 10s or similar.
With regards to the one wheel/two wheel arguement, well you could use a more powerful motor. You would have more difficulty in balancing the chassis overall for a balanced spin.
You also have to look at the size of mosfet you are planning on using for the on/off circuit. I'm going to assume you are using the open source material that I used for my play around.
The ampflow motors are good but I would recommend looking to see if you can go to one of the more powerful versions.
Thanks for the response. I might go for the motor in the following link. I will go for a max RPM of 1000. Is hardox too heavy to use for base, sides and top armour? http://www.robotmarketplace.com/products/0-E30-400.html
Hardox is perfect for the job
Are you still building Hornet 3?
(By the way the picture attached is of hornet 3 not my robot, though it may look similar in the future.)
if you want, the equation for speed is.
RPM x wheel size (inches) x pi (3.142[ISH]) that's inches per minuite.
those motors look a lot better.
Those are just the cheap speed 900s from ebay. The ampflow motors would be far better.
It's still as you see there, really just a piece of hardox atm. Once I have my workshop up and running in my basement I may spend time working on it. It will purely be a whiteboard and demo machine made for a bit of fun. I do still have the basic test chassis that i threw together to test the programming on the orangutan chip as well.
The location of the wheels in the machine is also an interesting point as it affects the spin up and max speed of the machine
I would appreciate some recommendations for some perhaps cheaper motors, as they would be quite costly to repair/buy spare. I have considered going brushless but not sure as to which ones to go for (brushless is just a possibility as i don't happen to have much to spend on motors). Also, just out of intrest, which way should the robot spin?
Brushless motors don't like to be started and stopped like you can with brushed motors. Plus the electronics would be a whole lot more complex.
In terms of cheap motors that would be useful. Look at scooter motors. Another option would be a bosch 400 (they are rated for 12v) run on 24v although they do weigh around 3.8kg
Doesn't matter about the direction.
Would the wheel be connected through a gearbox or straight to the motor shaft?
What thickness of hardox, how big and what would i cut i with?
Depends entirely on your design. When it comes to cutting either angle grinder or plasma cutter are your best bet.
Hardox is annoying to cut with conventional tools.
For outer curvves you can use an angle grinder. But inner curves, and especialy small ones, you'll need plasma or waterjet cutting.
sorry to hijack this thread a little.
I have seen people get very nice results via laser cutting.
how much would it be for a kind of featherweight size made of 2.5mm steel?
or is there no way of knowing the price.
and does it depend on the sides and sizes of the pieces.
thanks
What Maddox probably means, and what I would like to ask you:Quote:
Originally Posted by maddox10
Could you please think of a different name because there already is an active robot with the name Pulverizer. It has been aroud since 2000 and has been Robot Wars champion in the second Dutch series.
Archie your best bet with laser or plasma cutting would be to contact companies direct. Do a search via google for companies specialising in this service.
I realized I missed a question about gearing, you should always look to gear a motor down as far as feasibly possible to reduce the stress on it and your electrical components. You need to work out what rpm you require based on your wheel size, radius of the wheel from the center of rotation and what rpm you desire from the robot. Sit down and try and work it out.
Marien, is the name Revolution ok with you?
http://robotwars.wikia.com/wiki/Revolution
finding names is hard! :wink:
If you know you are going for Melty Mind drive why not something like Sinister Translation?
Idea is taken from Death By Translation from the states.
Yes, but I'm no authority in this area :-)Quote:
Originally Posted by Mega Masher
I'm just trying to help, LOL.
Thanks for the suggestions, but i with the help of Photoshop, i have a solution: a pizza themed robot!
It's name would be Pizza Cutter and it will have one wheel.
Your photoshop skills are INSANE!
Haha, good luck with your build, meltys are always fun. :)
Thanks, i don't think anyone's used the name pizza cutter before.....
Here is a picture of a test model made from an old pizza base (hint, hint...) and below that is a basic test prototype made from an old hard disk platter and a scalextric motor (yes, i use pretty much anything to make robots!).
Sorry, the second picture didn't work. Here it is:
Sorry again, the picture just does not work. I will get it too you some time......
looks good!
Also try to build the robots before you add them to your robot list
Its not a wish list you know :)