Bitza Mk2

[PJ-27]

Finally started to get some work done on Bitza 2! Unfortunately (fortunately?) Dan is off to Uni in a couple of days so this'll be it in progress for a while.

Axle and Drum Shaft fitted. Wheels and teeth just resting in place:





The side frames:



And a component mock up:



We've gone for the exoskeleton design again since it proved so strong at the UK Champs 2011.

[Ellis]

Re: Bitza Mk2

Looks evil! :shock:

Seriously looking awesome. I'd love it if you guys didn't paint it and make it pretty. Leave it as is + armour etc, and rename it Scrap-daddy or The Devil Himself or something! People are always making their bots look mean by putting flames and what have you on them. This thing already looks far more terrifying than any skull-covered machine. :twisted:

[jonny]

Re: Bitza Mk2

cool! what are the teeth on the drum made from?

[PJ-27]

Re: Bitza Mk2

Oh don't worry we're not making it look nice. We want it to look like a scrap yard came to life. The scoop (not on yet) is some rusted metal, so it's going to look really rustic come the end.

We don't really know what the teeth are, but they are some sort of steel with what I assume a tool steel on the tips (which are seriously sharp). Dan picked them up at a car boot for 50p!

[jonny]

Re: Bitza Mk2

nice, i'm sure i've seen them on something i just can't remember what

[PJ-27]

Re: Bitza Mk2

Apparently they are something to do with working wood? I don't know what, unless you has some wood you needed destroyed!

[Max]

Re: Bitza Mk2

Looking good, what motors are you planning on using?

[PJ-27]

Re: Bitza Mk2

Mabuchi RS-775WC-9013, 300w watts apparently...

Got them from a couple of Dewalt drills Dan bought for 50p........ again!

[PJ-27]

Re: Bitza Mk2

Be able to do a bit more since Dan has been back for a couple of days. Finished up the frame and then parked Dan's 4x4 on it to see how strong it is/ straighten it up (photos to come soon) and then spent a long time scratching our heads about how on earth we would mount stuff inside. Eventually we came up with a neat solution for the fan motor but the rest is a mystery.
Also fired up the motor (since it came from a written off car) and it sounded terrible! I later found an M5 bolt stuck to the windings, so took that out!






Also fired up Spinza today, but that ended with the blade spinning so ferociously that the wheels fell off and it snapped the timing belt turning the blade. Made a nice circle cut in the wood though...

[PJ-27]

Re: Bitza Mk2

And the car photos as promised.

Completed Frame:


Car on Frame:


And here is Spinza after it shook it's wheels off:

[Laser]

Re: Bitza Mk2

cool

[PJ-27]

Re: Bitza Mk2

Managed to do a little more to Bitza 2. Dan made up some motor mounts from Nylon (off cut) which we have bolted to some box section (old BBQ) and steel plate (oven shelf) to then sit at the back of the robot.

Trouble is we were very ambitious with our space and placing and now there is simply no room for the car fan motor. The teeth can still spin freely and the drum from Jamie should also fit but there's just no room for the motor given it's shape and size.

Unfortunately we are some what stuck for a solution.

[Leonardomayo]

Re: Bitza Mk2

Mount the wheels externally and make wheel guards?

[RogueTwoRobots]

Re: Bitza Mk2

Extend the front a little? Should only need to add on a few inches to accommodate the car fan motor.
Also, haven't made it to a post office yet but will be heading in tomorrow so will get the drum sent then

[daliad100]

Re: Bitza Mk2

I'd make one side of the box section flush with the mounts, rotate through 90 degrees and attach to the back bar of the robot so your motors are on top of one another.

You should gain a couple of inches of room in the front that way and still have a bit left over in the back for whatever.