JohnM -
"SWAP your master/slave surfaces. Mecway and CCX use asymmetric contact, which mean this matters. You generally want your slave surface to have the finer mesh." Yes, I am familiar with this. As I mentioned, I deliberately set up this model…
Since both the denominator and numerator go to zero on the Z-axis, I vaguely recall that there is a way to handle this (possibly taking limits). Just rearranging the equation didn't help.
I chose 1e-10 somewhat arbitrarily. What is the smallest rea…