Automatic size adjusting and damage preventing glass grinder and method of grinding glass materials

A glass grinder device, comprising:

• a fixed vertical crushing jaw;
• a movable crushing jaw having two different slopes with respect to said fixed vertical crushing jaw;
• an eccentric rotating mechanism, mechanically coupled to move said movable jaw in two different directions relative to said fixed vertical crushing jaw so as to grind input materials;
• an adjusting mechanism mechanically coupled to assist said movable crushing jaw in grinding when said input materials are crushable and when said input materials are uncrushable, said adjusting mechanism is operable to move and hold said movable crushing jaw along a direction of a force generated by a hardness of said input materials, wherein said adjusting mechanism further comprises a first adjustment structure having a first end and a second end, and wherein said first end is mechanically coupled to said movable crushing jaw so that said first adjustment structure moves in a horizontal direction as said movable crushing jaw is moved by said eccentric rotation mechanism, and wherein said second end further comprises a slanted surface.