| 摘要 |
PURPOSE:To switchably select plural motors and driver circuits, by plurally providing tables, motors and driver circuits and enabling the mechanical coupling of the plural tables. CONSTITUTION:A motor 3a is connected to the first speed control circuit 2a and motor 3b is connected to the second speed control circuit 2b by placing selector switches 10a-10c to a contact condition as shown by a chain line to respectively independently control tables 4a, 4b. When a work is too large to be mounted on a single of table, the tables 4a, 4b are mechanically coupled by a table coupling means 9 while the switches 10a-10c are selected to a condition as shown by a full line to place the motors 3a, 3b under control of the first speed control circuit and synchronously drive the motors 3a, 3b. In this way, a large connected table can be used for a large work while an independent table can be used for a work other than the large work. |
