Importance

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Abstract

A coordinate measuring machine (1) of the type having a plurality of movable members, a probe (2), carriage (5), and bridge (6), each movable along an orthogonal axis adjacent member (16), in which a selectively engageable fine feed mechanism (10) is disclosed providing a limited range of precision adjustment of movement each movable member anywhere along the total range of member movement. The mechanism (10) includes a pair of opposing locking elements (18), selectively spreadable to frictionally engage a slot (20) formed in the adjacent member (16); and also including an adjustment knob (44) axially fixed relative to the locking elements in mounting plate (12) attached to a movable member or fixed member, rotation of the adjustment knob (44) allowing precision adjustment of the position of the movable member after the locking element (18) is engaged with the slot (20). The alternate embodiment of mechanism (10) includes a pair of opposing locking elements (80, 82) selectively speadable to frictionally engage a slot (20) formed in the adjacent member (16); and including an adjustment knob (108) axially fixed relative to the locking elements and threadably engaging a mounting plate (12) attached to a movable member or fixed member, rotation of the adjustment knob (108) allowing precision adjustment of the position of the movable member after locking elements (80, 82) are engaged with the slot (20).

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First Claim