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[miketad]

Hey all,

So here's where we stand now. After the meeting yesterday, I went on line to look for right-angle gear boxes and all I found those 1:1 ratio boxes
http://www.ondrives.com/pdf/gearboxes/BLHI-O-B20.pdf ---> small backlash, but size might be of an issue !
http://www.ondrives.com/pdf/gearboxes/B332.pdf ---> Small size, but twice the backlash of the top one. Another concern is that torque required might be more than what it can withstand (didn't work out the numbers, but this might be the case !).

I am also looking at different gear heads from Maxon Motors that are plastic !

Let me know what you think !

Mike

[miketad]

Also, if we can use a 15W motor, we can save allot on gearbox and motor weight, can this be done with 15 W motors Ryan ? we'll be saving [33 g (gear box weight saving ) + 96 g (motor weight saving)] X 3 = 387 g weight saving per leg !

The model numbers are:
Gear Box = 110325 (highest output torque ! ) http://shop.maxonmotor.com/maxon/assets_external/Katalog_neu/eshop/Downloads/Katalog_PDF/maxon_gear/Planetengetriebe/new/newpdf_09/GP-16-A-110321_09_EN_218.pdf

Motor = 266519 (relatively low starting current, would make it slightly easier for the electronics ppl) http://shop.maxonmotor.com/maxon/assets_external/Katalog_neu/eshop/Downloads/Katalog_PDF/maxon_ec_motor/EC-programm/new/newpdf_09/EC-16-266521_09_EN_147.pdf

Let me know what you think ?

Mike

[Rodriguez, Adrian]

Michael,

My initial search on gear boxes didn't turn up any new information than what you found. I did find another manufacturing listing a gear box but I'm not sure if it will help.

http://www.vonruden.com/gearboxes/right_angle_bevel/right_angle_bevel.html

Also, I need to know a little more about the specifications surrounding the type of gear boxes we can choose from, more importantly what the limits are. (ie. max diameter, max dimensions, max input power, etc.) We should meet sometime soon this week to go over the design. Make it happen, lol.


ADRIAN

[miketad]

Well, our design limits are as follows:
[list]
[li]Input shaft should be close to 4mm as the output shaft of the motor gear box[/li]
[li]The size should be proportionate to the motor and gear box sizes (22 mm dia, 110 mm length)[/li]
[li]It should also withstand the output torque  (1.2 Nm continuous and 1.9 Nm intermittent)[/li]
[/list]
Also think about transmitting power by cables, they're simpler and better in a way, but I don't know how are we going to anchor the cable to the pulley !