The problem is actually failing eyesight, I think. I can’t tell the difference between June 13 and July 13 🙂 Mystery solved, except I don’t know why I didn’t see the original post.
Thanks for the photo. I’ll have to study it a bit. On my Graves Mark 5XL, I do the equivalent measurement by laying the dop on a precision block and adjusting to 90.00 degrees. Then I rotate the quill and adjust the micrometer height adjustment until I get the same angle, so I get the difference in depth of cut directly from the micrometer. I repeat it by rotating only the dop, to make sure it’s straight. I did have a similar problem a while ago, but Peter Erdo from Graves fixed it quickly (and inexpensively). It’s now less than 0.001″.
BTW, precision 1-2-3 blocks are inexpensive and useful for a lot of things.