4 ms·
Both surfaces do wear, however any high spots will wear faster.
by bacon_waffle 6y ago
Both surfaces do wear, however any high spots will wear faster.
- SamBam 6y agoSure, but any high spots on either surface should do that, right? I'm still missing why it matters which surface is doing the moving.
- bacon_waffle 6y agoSorry, I must admit to not reading the OP before replying. Not sure what the OP is on about; of course both surfaces wear, the important thing is the sequence of which surfaces are compared/lapped against each other, and how they are oriented. The orientation is quite important - if each pair of plates are always at the same orientation relative to each other (or I suppose 180 degrees from that) then the plates may meet evenly, all having the same twist. Foundations of Mechanical Accuracy is a great book if you're in to this sort of thing.
- mhb 6y agoIt doesn't matter. This will produce three flat surfaces. It looks like he's just using the word control to denote whichever plate is on the bottom. The top plate will become concave and the bottom one convex due to the overhang of the top plate as it is being ground, but that is not relevant here.