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As much as I hate to admit it, Mark, that is a very decent design. As always, though, there are a few problems (courtesy of Dave Weston)
1) 2200mAh is nowhere near good enough for a HW. Heck, antweights have more than that! You'd need at least 5 times that. At LEAST. And do remember that 1000mAh = 1A.
2) You might want to switch to SLAs instead of NiCads but that's just Dave.
3) Where are the lifting arm and axe positioned? How can the axe put out 650kg of force?
Well he's got three 2200mah packs, which is 6600mah...to me that seems slightly pushing it for a quartet of overvolted Mags and a pair of actuators, but I'd say that would be enough for 95% of the fights you're likely to be in (lots and lots of ramming and lifting might run them down to a standstill)
P.S. which ants are these that run 2200mah? Jigsaw ran 350mah at the AWS and that was considered a bit excessive :P
I wouldn't put my faith in 6600mAh to be honest, although I'm basing that on old SLA mAh ratings needed for heavyweights; Nicads and A123s certainly being able to run heavyweights with less mAh. What about using 3Ah cells for each pack, thereby having 9Ah (9000mAh) in total? Would be a bit more of a safety barrier.
2) You might want to switch to SLAs instead of NiCads but that's just Dave.
SLA's?! Lets all go back a century or two technologically NiCD and Lithium provide a much better peak amps and storage capacity over SLA's for weight and size.
1: That's 2200mAh per pack, and since all packs are 30v packs, they're run in parallel to get 6600mAh total. But anyways, I've upped them to 3000mAh packs.
2: No... Only the oldest heavyweight robots tun off of SLAs(With a few exceptions, mainly Jack Orr's prototype robots). And I'm listening to Aaron's advice.
3: Look at the revised stats. The axe system is a modified version of the one used on Hydra, which put out 660kgs, and this one uses a bigger ram, but puts out less power.
1: That's 2200mAh per pack, and since all packs are 30v packs, they're run in parallel to get 6600mAh total. But anyways, I've upped them to 3000mAh packs.
Still a bit small; even in my old heavyweights back in 2004 I used at least 3600mah, but whatever.
Originally posted by corsair_lightning
2: No... Only the oldest heavyweight robots tun off of SLAs(With a few exceptions, mainly Jack Orr's prototype robots). And I'm listening to Aaron's advice.
Originally posted by knightrous
SLA's?! Lets all go back a century or two technologically NiCD and Lithium provide a much better peak amps and storage capacity over SLA's for weight and size.
Mark, Cabrakan runs off of SLAs, and they suit him quite well.
Heard of Hawkers, Aaron? :P
Originally posted by corsair_lightning
3: Look at the revised stats. The axe system is a modified version of the one used on Hydra, which put out 660kgs, and this one uses a bigger ram, but puts out less power.
Sure, Hawkers can provide a lot of peak current but for size and weight, A123's are better. My Hawkers are 12AH (900amp peak) and weight 6KG each. I can use 8 x 4Cell A123's which gives me a 13.2v 18.4AH (960amps peak) battery for only ~3.2KG.
The only real worth benefit is SLA's are pretty easy to look after, don't require cell balancing or specialized chargers. The 'advantages' doesn't even do anything in vapours though...
SLA is far from obsolete in HW, whenever you need serious amperage's, you cannot beat an SLA with any type of other battery. Not Nicad, Not NiMh, not LiPo, not A123.
All the newer types of batteries, rely on setting them in parallel, to up the max output. The only advantages you have with the newer type of batteries is weight. I still have 2 heavies with SLA in them, Mantis mk2 and RCC2. I won't even consider moving these to a different type of battery, SLA is perfect for them.
I know that in vapourbots the batteries are kind of an enigma, but don't assume that because a technology is older it doesn't have advantages. Not a lot of people know that a mechanical speed controller is more powerful and less prone to failure then an electronic speed controller, because hardly anyone uses them anymore since ESC's are more energy efficient. That doesn't make mechanical speed controllers bad or unusable.
For the most bang for your buck, SLA is still a very viable option. If you are pressed for weight, NiCad, NiMh, or A123 is the way to go.
Leo, stand back, back away from the SLA's, let them go :wink:
Other issues with 95% of SLA's is the way they are AH rated, I know the 7 & 12amp units I had were rated at those capacities when drained over 20hrs. Hence when people started switching over from SLA to NiCD they found they could run on nearly half the capacity (7.2AH Nicd's instead of 15AH SLA's).
after reading these i feel like an idiot now cos ive started a series and i was so excited to see the vapourbots comps and wanted todo mine its practically gone wrong
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