Quote:
Originally Posted by Michael Corsetto
Brendan, awesome job with such a thorough design!
One comment that may be nit-picky, but thought it was worthy to mention because the principle can be applied in the future.
On your arm pivot, I foresee issues with holding tolerances in the last stage of your gear reduction. Currently, that Center-to-Center is dependent on tolerances in gearbox mounting to frame, top gusset mounting to frame, hole location in gusset, etc. Especially with what I assume will be significant loads in the arm pivot, you want to guarantee proper C-C to ensure longevity/avoid failure in that reduction.
My initial thought would be use the gearbox plates as the gusset on that side, so the 1/4 plate goes all the way to the vertex, and you ensure proper C-C.
Just a quick comment on tolerance stack up, but overall an awesome design! Best of luck this (real) build season!
-Mike
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Thanks for the feedback Mike!
I see your point and agree. I can now see with my current setup using chains instead of gears for the final stage would have been a better choice as it would have been more forgiving. Using the gears and "splitting" the gearbox up was not smart.
My original design used chain but it really needed to have a strong tensioning system built in and figured gears would be a better choice but I didn't look at how that would change the approach.