HAL9000v2.0
10 kW
+1 but i just want to see how it will go.
Miles said:That's the Schlumpf one, I think.
See also:
http://www.schlumpf.ch/antriebe_engl.htm
http://www.bioniconusa.com/index.php/20 ... /#more-103
http://www.mbaction.com/ME2/dirmod.asp? ... 670D9D4B01
http://www.pinkbike.com/news/Truvativ-H ... -2008.html
liveforphysics said:I just played with the dewalt 36v cordless drill at work.
It appears the space for the transmission is a cylinder roughly 2" wide by 2" long. It's a 3spd tranny. I'm not measureing the ratios or anything, but it seems to have a wide range. The brushed motor is noisey, but the tranny and gears seem quiet enough to perhaps be helical, and the arangement is definately planetarty with dog-hub shift collars.
I can't imagine you could make a smaller or more compact solution than this little 2" x 2" metal cylinder's guts. Planetary's are so much stronger than anything else in the same size range. Maybe moving these guts into a machined case setup to support all parts on ball bearings, and provide bearing supports for lateral loading off the output for mounting a sprocket would be a hot ticket.
I could just be my plastic-gear-phobia kicking in, but I think something like this would be a more compact and reliable solution.
fechter said:Looks like you can buy one here:
http://www.robotcombat.com/products/BP388974-00.html
liveforphysics said:They make all metal gear grinder gear boxes with 2:1 reductions and helical cut bevel gears.
I think makita makes them.
All helical gears and shaft drive could make for a very slim and compact silent running unit.
GGoodrum said:John, I like the elctro-magnetic clutch idea for the Evo-style 2-speed belt idea as well, but where do you find something off-the-shelf?
-- Gary
GGoodrum said:Using gears for low is fine, but they'd probably have to be metal-on-metal, wouldn't they? If the belt drive was low, like we're doing on Matt's drive, you might be able to use a metal/composite plastic gear for high, as it would be less torque required.
Miles said:One drawback of the EVO system is that both belts are always running. As it stands, it can be used for regen in top gear only. I guess you could make it with two electro-magnetic dog clutches....
Miles said:Lots of photos of the EVO system in various stages of deconstruction, here:
http://www.flickr.com/photos/9849620@N0 ... otostream/