Frame Geometry Question

Will do.
I have scales to put in-line with my chains - I will try to connect them tomorrow,
I think I can do this without the motors running (I’m still waiting for a H-bridge board to arrive).

As a starting point to calculating the budget for the weakest lateral forces in the bottom corners, I think that the following sketch is correct. It calculates the largest lateral force (Gravity) before accounting for friction, router torque inertia, bit pull/bite, momentum, etc…
Does anyone see any errors here?


I’m not thinking clearly about this right now - but I believe the next biggest force is the lateral component of the chain tension, which would add 17.3lb*sin(21°)=6.2lbs in the same direction… That adds up to 12.9lbs of force, which seems like a lot -

I would sure appreciate any validation or correction if someone has thought this through.

Maybe I can figure out a setup to check this with the fish scales tomorrow.