small banebot motor with 64:1 gearbox

[burkey_turkey]

so one last question in my never ending struggle of finding the right arm motor, can the fisher price mini bike motor can go through the same gearbox that the CIMs go through? if this is true than my work is practically done for me:

2700 rpm -> 45rps

12:1 gearbox -> 3.75rps

the 4:1 attachment -> ~1 rps

some procket reductions (1 or 2) and its at a reasonable speed!

the minibike motor seems like its CIM ish enough to fit in one of those, but we are already using both of our gearboxes for the drive and cant test to see if it works cause its already assembled. it would be nice to know if it would work before we buy the gearbox.

[Cowmankoza]

Team 1251, is using 2 of the banebots motors with their 125:1 planetaries (lovely numerical coincidence). just to play it on the safe side

[Joe Johnson]

I am a big fan of the Banebots gearboxes. They are great little power packs. But I am worried about them too.

I am working on some analysis that is intended to predict the max torque I would recommend for use on the 42mm and 36mm gearbox.

Note that just because the ratio is available it does not mean that it would be safe to use all the torque available (if you stall the output shaft or impact loaded the gearbox for example).

As I say, I am working on the final recommendations, but my I am leaning toward talking teams out of the 256:1 ratio on the 42mm gearbox and the 125:1 on the 36mm gearbox in applications where the motor can be driven to stall.

More to come.

Joe J.

[Dan Richardson]

Originally Posted by Joe Johnson

I am a big fan of the Banebots gearboxes. They are great little power packs. But I am worried about them too.

I am working on some analysis that is intended to predict the max torque I would recommend for use on the 42mm and 36mm gearbox.

Note that just because the ratio is available it does not mean that it would be safe to use all the torque available (if you stall the output shaft or impact loaded the gearbox for example).

As I say, I am working on the final recommendations, but my I am leaning toward talking teams out of the 256:1 ratio on the 42mm gearbox and the 125:1 on the 36mm gearbox in applications where the motor can be driven to stall.

More to come.

Joe J.

Heh, I wish I would have read this post before purchased multiples 125:1 gear boxes. However they should never even close to reach stall so i'm not overly concerned. Impact moment might not be as friendly as it needs to be tho.

[Justin M.]

We are using two 64:1 42mm Gearbox w/ the FP motor to power our forklift. Two 64:1 36mm Gearboxes will be powering the "arm".

We'll tell you how well it goes later this week. We realized the best way to see if it'll work is to try it, then go from there. If there isn't enough torque, then we'll get different gearboxes.....