I agree with Jamie, so long as its non-profit or neutral (ie you can sell parts at the price it costs you to make them) the you are all good.
I personally think all the control is in the lower ball with magnets to hold the top in place and make it turn etc, but there are many different theories.
Indeed there are. I personally think the head has omni-directional drive control, as the head can move a certain amount with the body remaining still, and is restrained magnetically to the ball, with a magnetic dome (think like an umbrella) inside the large ball. That itself is then connected to some sort of vehicle inside the ball providing the main drive. But there's a guy on Youtube building his own version based on the idea that the ball is completely empty and the head balances like most heavy objects on a pole etc:Originally Posted by Eventorizon
Been doing some work on the speed controllers for Gabriel
I have decided to go for Roboteq speed controllers, they are two channel units but for this application I am using them as single channel this requires on this type a little soldering as shown below. the result is I hope a reliable method of running mag motors in an axle bot.
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On the ball robot I have taken delivery of the head dome this is the 300mm unit, I at this moment am finding suppliers for the 500mm dia ball still hard to find. the ideal is a polycarbonate sphere, in two halfs with no flanges. I can find any of the two but not all any help here would be appreciated.
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Last edited by craig_colliass; 2nd May 2015 at 10:39.
Hi I'm looking for a gismo that can be connected to speed controllers that drive fan motors. the idea is balance
imagine a horizontal board that can pivot in the centre, with 4 fans fitted front back left and right, if the board is pushed down at the front the front fan will run to raise the front, and the rear fan would run to push down the rear until the horizontal plane is maintained then the fans stop.
I'm thinking the multi rotor units must have something like this on board, any ideas?
If I don't use the wheels for BB8 and use something else what to do with the old chassis.
I could see if I could bring new life to this tired rotten old apple.
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A new speed controller on Cherubs lifter, It works so much better I may have it controlled by a separate transmitter for the champs. see you can fit a botzbits 85A speed controller on a heavy.
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This would me my guess as to how it works :L http://xkcd.com/413/
I have been wondering how to fit the fuses and links into the revised Gabriel, I want to separate the electrics into two parts connected only by the radio receiver. the Andersons and maxi fuses seemed the best method.
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The fused link isn't finished as it will receive a plastic plate on the back for pushing the link in and a strap or loop for easy ejection of the link.
This fuse is rated at 100A so on Gabriel it will have a total fuse capacity of 200A this robot is running big Ampflow motors. but maxi fuses go down to 30A this is close to Featherweight stuff.
Hypothetically, isn't that just a self balancing robot in two dimensions?
http://en.m.wikipedia.org/wiki/Ballbot
First things first
For all the Star Wars Fans
May the Forth be with you.
On to more mundane things the speed controllers in Gabriel are coming on. the big problem is the continual lack of space for the Roboteqs
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As you can see I have had to stack them one on top of the other and pack a lot of wires between them, the problem was I designed Gabriel for a Wotty but these came up cheep so plans changed, as you can see there is now 2 links one for each speed controller and associated LED.
I still have to find room for the RX and the V-tail mixer, yes things are that tight! but by the end of the week I hope to have this part of the modifications done. leaving the modifications to the wheels to provide them with a crude torque limiter in the hope this will spare the drive gearboxes.
With regard to the BB8 project
I have ordered most of the basic drive train.
the Wheels, hubs, motors, speed controllers (all 4 off). Also the mixer the RX I am planning on using a 3s LiPo around the 3-4 Ah. the motors will not draw much more than 2A when stalled so this should drive the thing all day! the chassis will probably be Polycarbonate, it's strong and I have lots.
I am probably going to build a "flat floor chassis" first to test run the innards before I do the unit for the ball, in the ball the motors will have to be inclined at an angle to accommodate the curve of the sphere.
Still not found a suitable sphere for the project so Keep looking 20" or 500mm diameter is the target plastic preferred Polycarbonate or any plastic that can be painted 5mm thick split into two.
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