So this perhaps? It's just I have no experience or knowledge of LiPo's, I've trying to avoid them as I know about how careful you have to be with them., and now I need one because of how light they are.
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So this perhaps? It's just I have no experience or knowledge of LiPo's, I've trying to avoid them as I know about how careful you have to be with them., and now I need one because of how light they are.
How many fights do you want to do without recharging?
Hannibalito III does the job with 4S A123's, and those are only 2300mAh.
But if don't want to use a voltagebooster, then 6S 3000mAh 30C-40C should be good enough for Skyfall in the proposed configuraton.
As I will mostly be running it at normal schedule RR & RL events, I would like it to do the two fights in show 1 without needing to be charged inbetween them and still not run low on charge in the second fight, charge it in the break between shows, then do another two fights.Quote:
Originally Posted by maddox10
Pity about the weight and money you'll spend on an overspec'd pack.
Also, we can recharge the A123's in Hannibalito 3 in about 20 minutes with the Imax B6.
In Hannibalito 4, we can exchange and recharge the3S Turnegy Nanotech pack in less than 15 minutes, and we have spare packs at hand. Turnaround for Hannibalito 4, except battledamage, is less than 5 minutes.
The new antweight is done for the Geek Lates event in London this Thursday:
http://www.youtube.com/watch?v=aQon1so2T8c
im 99% sure that is a claw i had made a while ago and if it is then its not ti its all mild steel
I also picked up Metal Beak's beak from Jamie at the event:
http://i1234.photobucket.com/albums/...ty100/Beak.jpg
Lovely, 20cm long, 1.5mm welded Ti construction, 2.5mm Ti point, and it only cost a fiver :D ![/quote]
I have to admit, I never have found Ti Box-section for sale , and the discoloration on the welds rather make me think about steel, than Ti.
Touch a magnet against it, although if it's stainless then it won't attract either.
The entire body is non-magnetic, but the tip is mild steel. Missed that in the original post, but no matter, a steel tip is better as it won't blunt as easily. It doesn't look like stainless, and it was advertised by Jamie as being Ti, and I trust him, so I do believe it's Ti.
While on the topic, how much force would the Gimsons 12v GLA6000 Linear Actuator produce if overvolted to 18v?
Touch a grinder on it... If the sparks are white it's ti... But if you know the tips steel... It won't be... You can't weld stainless to ti.
Or you could use a Mass Spectrometer.....
Should get 600kg out of an overvolted one but probably not that much force at the tip due to mechanical loss etc, but even after that wont be half bad
I spark tested it, IIRC It's not ti
More like 900kg
I was under the impression it was titanium, but from what's been said it's not sounding likely, in which case I apologise.
Well, been a while since the last update, Project X is now retired. After realising that it had many faults, I decided to rebuild it, and for one last fling, I took it to the RoboChallenge open day and let Troublesome 2 finish it off (vid on my channel). The new model will be smaller, run off of a pair of LiPos and have steel plating instead of 10mm HDPE on top. As for Skyfall, the buying stage of the parts can start soon, now that my mum is happy I know enough about LiPos now :roll: . Updates on that to follow. On another note, I have successfully bought Chuck off Shane and will be running it at all future events.
Fantastic! I always thought Chuck was a brilliant machine. Fast, tough, brilliantly tactical weapon. We had it in one of our rounds at the GSL back in April, I wasn't looking forward to it...
Shame about Project X. The change to LiPo will rocket the performance though! And this time, give it an extra mm of clearance, haha.
Look forward to it mate. I want to see documentation of everything!
Damage pics on Project X:
http://i1234.photobucket.com/albums/...209_152054.jpg
http://i1234.photobucket.com/albums/...209_152032.jpg
http://i1234.photobucket.com/albums/...209_152026.jpg
http://i1234.photobucket.com/albums/...209_152016.jpg
Cause of damage:
https://www.youtube.com/watch?v=OLowB0t0SVM
that'll buff out :)
nice one Jarvis, gratz on chuck as well. try not to kick too much arse.
Well, the idea was a spinner proof robot...
And it half-worked, the body was written off, but all 6 motors were still going at the end of the day, it just couldn't move because all of the HDPE on the top and bottom was bend up above the wheels :lame: . A new 6WD full body hammer is required, smaller, LiPo powered, and lotsa steel! Will be keeping the 40mm HDPE too; it may not be the strongest stuff, but no spinner is going to go through that, the best both 720 & Troublesome did was take about 2-3mm off the side. Add a steel plate onto that and bingo, steel box of inpenetrability :lol: .
http://i172.photobucket.com/albums/w...pscbefabd3.jpg
http://i172.photobucket.com/albums/w...ps7d4775d8.jpg
I'll just leave this here 8)
Thanks to Mario for making them!
I have always wanted to make my drive wheels like that! Is that what is going in Skyfall or in the 6WD pusher?
These are for Skyfall. The 6WD pusher (Ricochet) will use six 18v Gimsons on a 22.2v LiPo.
So THAT'S their destiny! Awesome! I have watched their progress over the past month or so and they are indeed very nice. :)
BotBitz ESCs arrived, material being cut soon!
Update:
http://i1234.photobucket.com/albums/...pse5ec035e.jpg
http://i1234.photobucket.com/albums/...ps1a604158.jpg
She is a lot smaller than before!
Looking good. I can see you have moved the wheels so she won't steer like a pendulum. Have you solved the battery problem yet? :lol:
The battery-flying-out-and-hitting-the-polycarb problem came about because the person responsible for making the brackets ingnored my instructions and only made them for widthways on the battery rather than widthways and lengthways, as a result, it slid out when the robot self-righted.
Anyway, I rigged up Ricochet for it's first test run:
http://www.youtube.com/watch?v=CZh1pSYRiHU
Only a quick test run. It's running on the two old 5000mAh 12v NiMHs in the video, it will be upgraded to a 3S LiPo for the champs so it will run faster and have more torque. She has more ground clearance than before, so she won't get stuck on eveything. The rest of the parts (including all the 30mm HDPE bulkheads) are cut and ready to bolt on, but due to a calculation error, the motors need adjusting to fit it all on. There are plans afoot to make 3.2mm Hardox scoops for both ends before the champs, and also plans to upgrade the motors to 18v Gimsons GR02's and run them on a 6S LiPo. It will be crazy fast and have insane pushing power, and that's what the aim of the robot was in the first place!
PS. Someone fix that damn YouTube embedding problem, it's driving me mad!
If you have built it around GR01's you will struggle to get the GR02s to work without changing so much you may as well make a new machine.Quote:
Originally Posted by MicroGravity100
I wanted to do that in Conker but not only are the mount holes completely different but as its 5mm thinner in each direction the wheels would no longer sit along the central plane of the robot.
We changed to GR02's in Binky and I have had to resort to 3D printing custom brackets top make up for all the inconsistent reference points. :uhoh:
Besides a 6WD 24V GR02 machine is on my build list so hands off :lol:
http://www.youtube.com/watch?v=eSCcIv_dLlgQuote:
Originally Posted by Eventorizon
:lol:
Do be aware that you run the risk of killing the gearboxes if you overvolt. It's not as extreme as our overvolting was, but 18v motors have way more torque at nominal voltage; the pins are likely to fail!
Gimson GR-02 motors are rated at 6-25v. Failing that, they do sell 24v ones.
By pins I don't mean the motors, the motors themselves will take 6s no problem, I mean the subsequent power they will put out will most likely cause the gearboxes to fail. This type of gearbox has plates that have pins on them, on which the gears spin. The second set of pins are under major stress from the torque of a motor, and in our experience (and endless examples of the same over the years) the monstrous torque produced by an overvolted motor causes them to loosen and literally fall out of their position. 8/10 times this will lock up the gearbox, quite possibly strip several gears, and if the motor continues to receive power for long after being unable to move it will burn out.
If more speed is what you're after, I'd recommend doing the conversion of 36:1 to 24:1. :)
No need, I intend to buy 24:1 GR02s. :)Quote:
Originally Posted by Ellis
What embedding problem? :PQuote:
Originally Posted by MicroGravity100
http://www.youtube.com/watch?v=CZh1pSYRiHU
I think that's what you call a 'user error'.... ;)
In all fairness though, it is a very specific YouTube URL you need for the embed to work.
http://i1234.photobucket.com/albums/...psf77ec810.jpg
Ricochet ready for the NEC, just awaiting the LiPo's delivery.
http://i1234.photobucket.com/albums/...ps35c5d556.jpg
Lovely bit of 3.2mm hardox to be mounted on the front, courtesy of Mario (again, thanks for putting up with my incapability to do anything for myself!)
A bit of progress on Skyfall:
http://i1234.photobucket.com/albums/...ps0d5483d8.jpg
I should have the drive rigged up for a test soon, watch this space :)
Looking good, very nicely made :) is there any reason the flipper's so steep though? It does seem to my untrained eyes that it wouldn't be as good at wedging under people as a shallower weapon would be (thinking about how effective the Beautys were at the championships)...
Joey, it's the ram. It's 100 stroke * 50 bore.