The trimming platform of Mitech portable surface roughness tester, one of the most important accessories to realize the accurate roughness measurement, equipped with the device for the X-Y micro-feed adjustment and X-Y in-plane rotation micro adjustment, stable and reliable, it is the necessary auxiliary trim platform for high accuracy roughness measurement. The dovetail guide rail can ensure the X-Y to straight accurately movement. The trimming working platform, need to use with measurement support platform, it is the necessary accessory for the testing of parts with complex shape and high precisely measurement. It also can be used as auxiliary adjustment tool for other measurements. Its parameters as below: X: ±12.5 mm, Y: ±12.5 mm. Rotation: rough adjustment: 360o, micro adjustment: ±5o.