warning - massive f'ing post, sorry....
thepronghorn said:
I don't think you want a lyen sensorless controller. ...
In addition, you might also want to take a look at the P80 gearboxes made by banebots.....
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Sorry to Hijack your thread Snowchyld (later post)......
no probs with that mate, so long as it A, resembles the topic B, talks about beer or C talks about attractive women or D all of the above im happy.
the controller I have been talking with lyen about is a non-infinion, and he has a few vids of it pushing the larger 170kv motors in a friction drive up to 60v, so given that it should be ok, though he doesn't know the max switching htz. Worst case scenario it can become a lower powered backup for the HT (though itll be pretty uninspiring at <70V) I could (just) afford a CC, and I'm getting a quote from matt for one, but since i'm starting with a smaller RC motor for ~3kw anyway the 6fet will hopefully work out.
Great find on the cheap boxes, though given others experience I think I'd rather spend the $$ and get something that is rated for atleast the torque ill be running. at ~150 delivered, i could be tempted in the future to try one in a low power chain puller <2kw.
right now im shifting between the GBPH-060x-NP:
and the GBPH-090x-NS:
price is about the same, but the top one has 25% higher imput speed and a smaller profile, at the sacrifice of torque handeling (30% of the second one). I know the larger 80-100's will put out peaks of about 9nm at about 100a, but does anyone know the torque of hte smaller motors like these? if its around 4nm or so then the smaller one should be fine, given its 'peak' torque is about 130nm, and the continual is about 45.
https://www.leaderhobby.com/product.asp?ID=9394001224161&Location=HK
I'd prefer to go with the smaller of the two gearboxes, 120mm is far easyer to fit than 170 (though about 50mm is axle in each case), but it'll limit me to about 3kw im guessing. If I end up using the larger can motors ill be needing to upgrade the gearbox too.
bandaro said:
looking good dude, to get it built over the holidays will mean you can't make any changes, as shipping in the new parts will take you over time...
Couple of things though, firstly regarding the motor, were you going to go the 6374-170 or the 80100-130? .....
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I would love to take a squizz at your designs if I could, see how you have done it and if there are any problems I can see. If you want to pm me them/upload them that would be awesome.
So lastly, being both in OZ, if you are getting any parts from a seller that has a 13t sprocket and a 15t freewheeling sprocket in stock............
What degree are you doing at uni?
Yea im guessing that Ill miss the start of uni deadline by a country mile, given that it could take till the end of jan to gather all the parts just to start! but hey, you gotta set some sorta goal, and I got nothin but free time till then
Motor wise, im starting with the one linked above, running at 40v and ~60-70a. eventually ill upgrade to a 80100 or the 170kv version of the same motor (is that the 6374?) EDIT i think I just figured what the #'s mean, ie can diameter x can length, in which case the 2nd motor will be the 8091.
Does anyone know of any simple cad software to quickly drum up some sketches
ive used solid works a little, but I lack the skill yet to build anything complex. might have to take a few days to train myself once everything is 'in the air'
free-wheel wise at this stage, im waiting to hear back from matt re buying his slipper clutch + a 1:1.3 pully (or near to) as well. Hopefully he has something like that available. if not ill have to find either a chain freewheel or a belt one. I'd much rather go with belt, but given the low tolerances i may end up using a chain to start with. For the BB ill be using prob. a white industries for one or both the motor and the pedal cranks. Ill let you know, ill be ordering prob. late on tues/wed.
Studying Electrical and sustainable engineering ad Adelaide uni. Just finished my first year. enjoying it so far, apart from the work load (50+hour weeks
)
Once I hear back from matt ill start placing orders. with luck they'll start shipping before crissy. my guess is ill end up being held up waiting for the gearbox, ive sent 'em a email but if I dont hear back soon ill call em, though chances are they're on Christmas break already.
nikos7 said:
I would definitely not recommend the Bane Bots planetary......
[youtube]GZi0V6hdEcc[/youtube]
powdered metal eeeeeeeeeeeeeeeeeeewwwwwwwwwwwwwwwww! hehe. thanks for the tip. I think ill try out the higher rated stuff from AA.