| 摘要 |
PROBLEM TO BE SOLVED: To supply an optimum amount of grinding water to grinding means, at precise timing.SOLUTION: A grinder 1 includes: grinding water supply means 50 for supplying grinding water to an upper surface Wa of a plate-like workpiece W and a grinding wheel 25; a grinding water supply source 54 made to communicate with the grinding water supply means 50; a flow rate adjusting valve 55 for adjusting the amount of grinding water to be supplied from the grinding water supply source 54 to the grinding water supply means 50; and control means 60 for controlling at least the flow rate adjusting valve 55. Therefore, if electric current value detection means 40 detects a load current value applied to a motor 23 while the plate-like workpiece W is ground, the control means 60 can control the flow rate adjusting valve 55 so as to increase the grinding water according to the load current value. Thus, an optimum amount of grinding water can be supplied to the upper surface Wa of the plate-like workpiece W and the grinding wheel 25 at precise timing when the plate-like workpiece W is ground, and a water saving effect can be achieved. |
