In order to test the straightness of an inverted vee of a guide way in a...

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In order to test the straightness of an inverted vee of a guide way in a horizontal plane of machine tool, an autocollimator and a reflector block of 127 mm base length are used. The reflector block is stamped "30sec=0.018mm". Reading of the autocollimator at 10 consecutive positions of a 1.5 m long guide way is recorded as follows: C D E F G H Position A B I Reading 1'30" 1'36" 1'40" 1'48" 1'52" 1'54" 1'58" 2'0" 2'4" J 2'8" i. Determine cumulative linear displacement of each position w.r.t initial point zero. ii. Draw the graphical representation of the straightness of the guide way w.r.t line joining the starting point zero and end point. iii. Can this machine guide way be acceptable? Note: Departures of 0.02mm per meter is considered to be an acceptable tolerance for out of straightness. In order to test the straightness of an inverted vee of a guide way in a horizontal plane of machine tool, an autocollimator and a reflector block of 127 mm base length are used. The reflector block is stamped "30sec=0.018mm". Reading of the autocollimator at 10 consecutive positions of a 1.5 m long guide way is recorded as follows: C D E F G H Position A B I Reading 1'30" 1'36" 1'40" 1'48" 1'52" 1'54" 1'58" 2'0" 2'4" J 2'8" i. Determine cumulative linear displacement of each position w.r.t initial point zero. ii. Draw the graphical representation of the straightness of the guide way w.r.t line joining the starting point zero and end point. iii. Can this machine guide way be acceptable? Note: Departures of 0.02mm per meter is considered to be an acceptable tolerance for out of straightness.

Answer rating: 100% (QA)

i Calculation of the cumulative linear displacement for each position 1 Convert readings to seconds Subtract the initial reading of 130 from all readi... View the full answer