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This paper addresses the workspace analysis of two 3-DOF translationalparallel mechanisms designed for machining applications. The two machinesfeatures three fixed linear joints. The joint axes of the first machine areorthogonal whereas these of the second are parallel. In both cases, the mobileplatform moves in the Cartesian $x-y-z$ space with fixed orientation. Theworkspace analysis is conducted on the basis of prescribed kinetostaticperformances. Interval analysis based methods are used to compute the dextrousworkspace and the largest cube enclosed in this workspace.

A Comparative Study between Two Three-DOF Parallel Kinematic Machines using Kinetostatic Criteria and Interval Analysis