Motorcalc spreadsheet errors

[jimbo_cnc]

I can't find where I downloaded it from now, so I'll put this in General.

Here's what I found. Perhaps someone can check this over.

I deconstructed the spreadsheet and simplified it, getting the same results.
Then I looked at the equations.

I think I have found these errors:

1. rotor inertia conversion error. Should be 1e-7 conversion not 1e-8.

2. torque to accelerate the gantry should include the ballscrew efficiency.

3. <deleted> my error


Net result is I get different values for 2 of the 4 torque components.