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Linear axis, Linear module, Electric motor, SCARA robot, Linear servo-motor
Text version of the page
| 2-2 Equation for moment of inertia calculation Usually the R axis load is not a simple form, and the calculation of the moment of inertia is not easy. As a method, the load is replaced with several factors that resemble a simple form for which the moment of inertia can be calculated. The total of the moment of inertia for these is obtained. The objects and calculation methods often used for the calculation of the moment of inertia are shown below. | |||||||||||||||||||||||||||||||||||
| 1. Moment of inertia for cylinder | |||||||||||||||||||||||||||||||||||
| The equation for the moment of inertia for a cylinder that has a rotation center such as shown in Fig. 6-18 is given below. | |||||||||||||||||||||||||||||||||||
| WD2 | |||||||||||||||||||||||||||||||||||
| 32g | 8g | (kg • cm • sec2) | |||||||||||||||||||||||||||||||||
| ...(6.1) p : Density (kg/cm3) g : Gravitational acceration (cm/sec2) W : Weight of the cylinder (kg) | |||||||||||||||||||||||||||||||||||
| d | |||||||||||||||||||||||||||||||||||
| Fig. 6-18 | |||||||||||||||||||||||||||||||||||
| 2. Moment of inertia for rectangular parallelopiped | |||||||||||||||||||||||||||||||||||
| The equation for the moment of inertia for a rectangular parallelopiped that has a rotation center as shown in Fig. 6-19 is given below. | |||||||||||||||||||||||||||||||||||
| pabc (a2+b2) W (a2+b2) | |||||||||||||||||||||||||||||||||||
| 12g 12g ...(6.2) p : Density (kg/cm2) g : Gravitational acceration (cm/sec2) W : Weight of the rectangular parallelepiped (kg) | |||||||||||||||||||||||||||||||||||
| Fig. 6-19 | |||||||||||||||||||||||||||||||||||
| B-IQ | |||||||||||||||||||||||||||||||||||