Saturday, August 16, 2025
X And Y Driving Flexure Upgrade - Now Linear
By using a complementary flexure linkage on the X axis I now have linear linkages to the Stage. This is not a cure-all (see later), but it's a big step in the right direction.
The new flexures allow the stage to move along the Y axis while still being perpendicularly on the X axis. No bendy, non-linear, thin flexure links. Quick tests have revealed a new problem though.
The XY Table is not fully constrained and will allow some rotation, which was known. Previously though, when moving only 2mm this wasn't a titanic issue given the other sources of non-linearity in the design. However, it starts to get quite noticeable when displacements of 4mm or more are made. There is a fix: Join the base ends of the complementary pairs together. Another modification to the Frame Flexures. *Sigh*
Of course, it would help if I had an Axis Driver that could produce +/- 4mm of actual movement, wouldn't it?
Wouldn't it? Hmmmm....
