The grinder consults measurement modules to control the endpoint thickness of the sapphire wafer thinning process. but these modules have shortcomings. We propose a forecast-based endpoint thickness and online error compensation approach for grinding hard. brittle material. https://www.bekindtopets.com/super-find-Pet-Odor-Exterminator-Air-Freshener-Spray-Hippie-Love-7-oz-deal-zone/