I use a Lapmaster to lap titanium "pucks" flat from 0.4000" (machined height) to no less than 0.3970". The process which uses these pucks is optimum when the pucks are 0.3970" - 0.3980". Currently we analyzed the time to lap these things and have it dialed accordingly, but sometimes we get something under the limit (0.3970").
Any ideas on devising something that will signal an alert when the accept thickness "window" as been reached? The fixtures used to hold the pucks (and provide weight) are cylindrical and freely spin as the puck is riding on the lapping plate.
Thanks to all responses. Marcel