I really like the work. What I like most is that it is an attempt to explicitly state the performance attributes (minimum available force) which drive a decision for frame geometry. In order to really get this right, all the potential constraints would have to be considered.
I think @dlang did a good job discussing a number of other potential limiting factors.
It is not clear to me that minimum available force is what constrains the Maslow. Here a few other performance attributes which may be constraining:
- Stiffness in the bottom corners is limited by chain-sag. If a cutting force is in the same direction of the chain’s tension, the chain’s tension is reduced; the chain sags more. This leads to a positional error.
- Stiffness in the top center is limited by the chain’s elasticity. If a cutting force is downward, the chains will stretch, which leads to a positional error.
What I like is: if you create a script/model/function which can take the frame geometry as inputs, and calculate these you can quickly analyze a frame design.
My recommendation is to just be as meticulous as is reasonable, to include all the performance attributes and parameters. That way you will be more likely to create something that is broadly applicable.