Glass grinding machines can be either straight-line grinding machines or so-called shape grinding machines for grinding glasses with curved edges. Straight grinders are very popular machines, thanks to their robust design, easy and quick operation. Due to the serial positioning of several diamond wheels, they are capable of grinding and polishing glass edges within a work cycle. These machines may have 2 to 15 grinding heads/wheels. Shape / curved edge grinding machines typically perform grinding with a single wheel, and the grinding wheels required are continuously changed to finer grade to achieve the desired profile and quality.