Feedback:
- You'll want to have a member that can hold the heavier components
- Be cautious of if the motors will be hitting anything when going over obstacles
- Have wooden tracks that can simulate the conditions the rover might see in the field
- Paper print or 3D print templates to make manufacturing parts easier
- Think about how assembly will happen
- Make sure to loctite fasteners (242 blue loctite)
- Do proper torque calcs to be able to select correct reductions
- Don't need to be picky about what weights you use, can just use anything
- Careful about fatigue and stress concentrations for things shearing (Use online shearing calculators, those can be useful)
- Cross bracing would be useful
- Get ready to iterate on the spot
- look at yield strength of the material relative to the stress on the keys
- Marks (textbook)
- Maximize the hub length (shear calcs will drive things here)
- Oversize by factor of 2 or three
- We have basically 2 by 4 stretching between that, and we're cantilevering it off everything. We're only really off 1 bearing in particular.
- Take a look at shaft deflection standpoint wrt weights and stuff.
- We don't have a separate bearing support on the end wrt the gear box (scary/bad)
- Bevel set reduction from versa planetary (90 degree offset), motor sits flush with 2x4 https://www.vexrobotics.com/217-6293.html?___store=vexroboticsca&___from_store=vexrobotics
- Try testing with some wheels removed/broken
- Try to 3D print or paper print templates so you can just mark holes and go (instead of trying to utilize drawings, make it a 1 to 1 sample and cut with the saw)
- Make sure we have enough planetary sets to do smaller increments (1.5 margin over what we have, and get a 0.75 margin below) customizability is key
- Tough time turning, why? : When you turn ,you're running with a drivetrain that has friction points close to the ground, you're dragging all of that. Drivetrains themselves drop the centre wheel to drop the wheel base. (he'll send whitepaper), shorter wheel base affects turning radius, and
- affects lever arm to the wheel. Shorter wheel base = better turning elements, accomplish that by dropping centre wheel in that case.
- High reflected torque through friction needed to turn
- recommended back wheel be slightly higher, from rocker standpoint, if our centre of gravity is forward, and we touch on the front and middle wheel. That will adjust the position of itself.
- Things won't be perfect the first time, we spend so much time on the analysis etc, but then things don't work and you'll need to fix these small marginal things to make things way better.