Knab the gears out of something like this http://www.toolstation.com/shop/Power+T ... 400/p40354
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Knab the gears out of something like this http://www.toolstation.com/shop/Power+T ... 400/p40354
would have though they would be plastic gears and that they wouldnt be strong enough?
Wouldn't think so, should be designed to take the torque of a drill
Team RCC has looked into speed 700's and 600's for a feather drive. It always involves a 2 stage gearing.
But it is possible. After all, the most we ever have drawn from the batteries in a fight with a feather is 35 watts.
19.6V, 5 minutes. Means an avarage amperage of 21 amps. So any motor with a stall of 40 amps+ can do the job.
For cheap 90° gear sets that can do the job, look into budgetfriendly 4 or 4.5 anglegrinders. Those are ment to take the power (from 500W to 1100W), can be cheaper than seperate gearsets from HPC or simular, and come with bearings and all. Gearratio from the ones I used for Prodigy Evo's dual Speed 900 disk-drive were 2.5-1.
Meaning, if you add a first stage 12-72 (6-1), you have a 15-1 gearratio, meaning with 80mm wheels @12V with a speed 700 (15K rpm), the endspeed is 15 km/h.
Thanks for the responses, I am going to have to finish machining the big bits before finalising the drive. Still not really sure what to use...
Did they work out for you? I'm thinking of replacing my overvolted 18v drill motors with them.Quote:
Originally Posted by typhoon_driver
Also, what kinda ratio would you run to a 75mm or 100mm wheel if the motor was running on 22.2v lipos?
for 20km/h 100mm you need a 13/1 ratio
Hi All
I am building my very first featherweight, Shrapnel,
[attachment=2:3rtvkz2c]Comp Shrapnel MKII Assem 05.jpeg[/attachment:3rtvkz2c]
[attachment=1:3rtvkz2c]Comp Shrapnel Proto 01.jpeg[/attachment:3rtvkz2c]
[attachment=0:3rtvkz2c]Comp Shrapnel Proto 04.jpeg[/attachment:3rtvkz2c]
and I have already made a mistake with motors...
http://www.technobotsonline.com/re-540- ... -50-1.html
These are the ones I was going to use but after a chat with James Cooper from Robochallenge he recommended that I use something else. I know that drill motors are a good choice and I found these, on the same site stupidly, which might serve as a replacement€¦
http://www.technobotsonline.com/re-975d ... x-4-1.html
Would running 4 of these (not necessarily this ratio) be a good choice? What do the veterans think?
Also I need a motor to drive my weapon, a 2kg spinning disc. I am using 2x 7.2v 5.1 Ah NiMH racing battery packs, wired in series, for the power which puts, as far as I know, ampflow/brushless LiPol motors out of contention. Any recommendations.
Thank you in advance
Alex
Bosch 35's for drive, you might get away with just one each side.