Yes Jamie, yes I am... Took your time though... :lol:Quote:
Originally Posted by Jamie
Are those Victor ESCs in there? Looking to get the cheapest possible for BItzaWood.
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Yes Jamie, yes I am... Took your time though... :lol:Quote:
Originally Posted by Jamie
Are those Victor ESCs in there? Looking to get the cheapest possible for BItzaWood.
victors are quite expensive
I think the 85a esc work out at about £40 each
http://www.botbitz.com/
I would imagen he had them as spares because he uses to run drumroll on a speed 900/victor combo.
Yeah got a pair of Victor 883's controlling the robot for now. Not really ideal if these robots are supposed to be destroyed easily! But they'll do for Edinburgh at least, will probably get some Botbitz controllers to run it eventually.
Got these 883's on eBay; the 885 I used to control the Speed 900 drum is still goosed from when it went up in flames at the 2011 champs. Haven't yet got round to getting it sent back for (possible) repair.
Update
Did some more work on the wooden robot this weekend. After spending many hours last night looking for inspiration for a name - a mission that covered Greek mythology, Norse gods and dinosaurs among other things - I've settled on Reaver. Nothing particularly exciting I know (the name comes from a race of cannibalistic humans in the Firefly TV series) but it'll do.
Anyway, started work on a lifting weapon to mount on top of the chassis. In complete contrast to the use of wood, the majority of the weapon is fabricated from 3mm steel plate and angle. To begin with, I welded two lengths of L-angle together to give me a U-channel, and added some hinging points for the lifting arm:
http://i31.photobucket.com/albums/c3...d/DSCN6697.jpg
http://i31.photobucket.com/albums/c3...d/DSCN6700.jpg
I then dissected a car scissor jack for its threaded rod and nut. I welded the threaded rod on to a drill gearbox shaft, drilled and tapped two M8 holes in the side of the nut, and fitted a couple of bolts to hold some linkage arms:
http://i31.photobucket.com/albums/c3...d/DSCN6711.jpg
http://i31.photobucket.com/albums/c3...d/DSCN6713.jpg
Also fitted a nylon block to support the end of the threaded rod, and then added some more lengths of steel angle to make up the lifting arms:
http://i31.photobucket.com/albums/c3...d/DSCN6715.jpg
http://i31.photobucket.com/albums/c3...d/DSCN6716.jpg
Still need to weld on some bits at the front to finish it off, such as forks and possibly small outriggers. Should be done for Edinburgh.
Total weight with all that steel plonked on top is 9.7kg, so just under 4kg left for adding bits and bobs. And although this was only meant as a quick and easy wooden class bot, I'm sorely tempted to rebuild the chassis out of Nylon to make it more permanent. I wasn't expecting to develop it to this degree but it'd be a nice whiteboard/non-spinner machine to have in the clan.
I may be missing a big trick here, but that doesn't look like it will self right.
Looks good though :).
I don't think it will either, at the moment.
Gonna re-drill the linkage holes in the arm closer to the pivot so that I can get more travel out of it. But if it's on its back, I only need to move it 90° before the back wheels get traction and I can force it back upright. I'll wait until I get it wired up and running first though before tinkering with it.
What did.you use to paint the name logo on carcinus?
sorry if i spelt it wrong
Sorry Archie, just saw your post. I just cut the name out of card and stuck it on the robot, then used that as a guide and painted over it with red paint.
Update
Been working down in England most days for the past couple of weeks so there has been little robot progress made and still got a fair bit to do for Robots Live on Sunday. I've got my mum's birthday lunch tomorrow and then leaving for Edinburgh at 6.30pm so it's going to be a last-minute rush to get the robots ready. Suppose it's a bizarre form of anti-karma to make up for the fact I had the robots ready with plenty of time to spare before the UK Champs.
Anyhoo, progress on Reaver. I made use of a bit more angle iron and 3mm steel plate (all recycled from wind turbines :proud: ) to add a front section to the lifting arm. The design wasn't how I'd originally envisaged it as it was quite rushed, but it looks fine and seems to work well enough:
http://i31.photobucket.com/albums/c3...er_build27.jpg
Drilled a few more holes in the arms to allow different mounting points for the linkage arms, but I won't gain much more travel until I make new longer ones. Gave everything a coat of primer, still to decide what the paint scheme will be like:
http://i31.photobucket.com/albums/c3...er_build29.jpg
The whole unit is relatively simple, but I'm quite proud of it. There aren't too many engineering faux pas by my standards and it's much more robust than the lifting mechanism I made in Kaizer (sorry Ceri!)
Here's the lifting mechanism in place on the chassis. The black box under the HDPE houses the Electronize switcher I'm using on the arm:
http://i31.photobucket.com/albums/c3...er_build31.jpg
So thrown on a couple of bits of HDPE to provide some protection, and painted the chassis black. The HDPE is just temporary; will sort something more permanent after the weekend.
The MDF is already showing signs of wear though, and I doubt it will last past the event. Definitely going to make a chassis out of Nylon though, as the robot is super-fast and will be a good non-spinner robot to have.
Unfortunately when I was testing it tonight, I took the arm down to the bottom of its travel and then accidentally over-did it, jamming it tight against the chassis. After freeing it, I tried to move it up, but the Electronize switcher has stopped working. It still clicks (just one relay I think though) but there's absolutely no movement from the motor. Haven't had a proper look at it yet but will need to sort something for Edinburgh. Might have a back-up Electronize ESC to put in it, but I think a Botbitz 25A will be on the order list.
On the plus side, when it was working, it was lifting featherweights without much sign of strain; just need to make up some outriggers to stop it tipping forward. But for Edinburgh, LEDs, bottom covers, failsafes and paint are next on the list!
robot looks very professional Jamie well done
i meant was it watercolour, fence paint, acrylic or oil based like explosion and eruption?