Team Saint Robot Builds

[craig_colliass]

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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[typhoon_driver]

Craig, not sure if you've seen this http://toyland.gizmodo.com/an-exhaus...r-w-1709299669

[craig_colliass]

Hi yes I've been following his exploits from the very beginning video on utube with regards to this. he said in the second video it's not how the Disney one works!
He is using an inverted pendulum method I like it, but it isn't how the one used in the film works this is commonly agreed that it uses the "hamster ball" method with omni wheels unfortunately no information about the robot will be released before the film in about 6 months time. So everything is guess work but all the r2 builders agree on this point.
this was discussed on this thread in May I think, interesting project though.

[craig_colliass]

I seem to be collecting the 500mm globes now


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These are the wheels for the MK2 version of the hamster robot, the wheels are 100mm diameter this is quite large but I wanted the load capacity for the ballast weight up to 10Kg!

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[craig_colliass]

I cant see a thread to post about the Guildford event that happened over the weekend, so I'm posting here.

As always a big thanks to John and ALL the team at Robot Wars. the shows seemed to go very well and the audience seemed to enjoy the shows yet again. Had some great fights and looking forward to seeing the videos soon. Great to see some old friends, and so good Zack could join me for this event. there was a good selection of robots for the shows and finding places in fights was quite hard. only one fight per heavy per show. There were a lot of robots there!
Looking forward to Barnsley.

Robots taken were Saint and Gabriel also Seraph and E-Knock, with Kettle and Mc Apple.
Saint worked well and even stayed in the arena well almost (see video when it's out)
Seraph had some intermittent fault that I just could not be bothered to sort out!
E Knock worked well until one gearbox seized possibly blowing a speed controller. More on that one as news breaks!
Kettle bot worked better than it has for ages possibly better than ever, this due to a change in the transmitter used from the spec 5e to the spec 6I.
Mc Apple was good fun and people liked it, not sure whether to keep it or scrap it will decide later.

But for us the star performer had to be Gabriel it is now going like I wanted it too. I would be interested to know how the arena floor held up to the sledge hammer!
with the new speed controllers and motors it has all the power I need. I have a feeling the gearboxes may need some modification latter down the road as the load on them must be horrific. the torque limiters built into the wheels seemed to work as we didn't notice any slipping when driving but the aluminium washers were polished so something moved when it had to.

[craig_colliass]

The new painted Sledge for Gabriel. this time fitted with a tether.

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Under the rules normally, thwack or axle bots don't have to bother with these things as (in this case the hammer) is a part of the main body (because it is bolted directly to the body) of the machine. you don't tether any other panel to the robot do you!
But as Gabriel now swings the 14Lbs sledge head at quite a speed. it is probably just as well.

[craig_colliass]

https://www.youtube.com/watch?v=p-gh8jLBqIc

I was wondering how fast the 14lbs (6.35Kg) sledge hammer is now going on the improved Gabriel. in the video above the fight that starts at about 48.48 shows Gabriel going nuts hitting everything that moves. I calculate a standing hit to be about 0.33 seconds and a dynamic move, (Gabriel moving towards the target before hammer swings to be about 0.25 seconds. dose anyone have means of analysing the video to give some indication of how fast the swing is now.

[craig_colliass]

I have been repairing and improving Pilgrim over several months.


It's taken days of work but I am now on the last leg rebuild


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I will also probably convert it to run on LiFePo4 batteries while I'm at it.

[daveimi]

That's awesome, are you an engineer for a living?

[craig_colliass]

Had some problems with Gabriel at Barnsley I have rewired bits of it again and fitted a separate BEC with Isolating switches for that and the two speed controllers.
Also I have changed the links a bit, as they kept jumping out and stopping the robot in the fights.
since the modifications there has been no more problems. fixing different glitches seems never ending on this robot I hope I am coming to to the end of them!

Doing some work on Cherub I'm changing the lifter speed controller to a Bots-bits 85A unit Pictures to follow soon.
No Dave I'm a gasman


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[craig_colliass]

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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[craig_colliass]

I'm looking to fix one of these speed controllers it works in one direction but not in the other, there is no component damage that I can see, so I'm not sure what bit is likely to need replacing. any ideas?

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[widow_twanky]

Are these not the ones with an external relay? Looked on line for a wiring diagram but no joy.

I do have a few already wired up in the shed. From what I recall it's a single direction controller with an external h bridge for direction.

That said it might just be the single direction one which was available too.

[craig_colliass]

It is the bigger 30A 24V speed controller that blew when one of the two drill motors seized a while back.

I think the relays on this one are the 2 black boxes on the left hand side of the board they have something like NAiS ACP131 on them, dose anyone know were I can get these or something to fit.

This stuff is not something I would try but its bust anyway so I may as well have a play.

[Rapidrory]

Definitely sounds like the relays. It's quite possible that the relay contacts might have just welded shut. If you can take the relays off the board, you should be able to take the covers off them and clean the switch contacts with either a small file or a bit of wet and dry paper. If not then you might be able to get hold of some new relays.