pcdmis 3.5 mr 1

ph10t

tp20

good morning, i have a question i cant seem to find the answer to. please see attached drawing. it is the screen capture from graphics display. My alignment is level y minus to plane 2. rotate cyl 1 to x plus about y minus, origin y to plane 2, origin x and z to cyl 2. My problem is when i measure 2d distance from plane 2 to circle 2 parallel to y axis i get 7.3093. when i measure TP of circle 2 using only y and z as datums i get 7.3188 as y distance which is hrowing TP out to .018. ive noticed this difference many times but only .0003 to .0015 difference. this .009" difference is throwing up a major red flag to me that im doing something wrong. if my y axis is cyl 2, and in tp cyl 2 is primary datum, why would there be any difference in the calculation of the distance. using perp to centerline makes no difference in readings. i have made sure i am in the correct workplane ( x plus)thanks in advance for any help.

ph10t

tp20

good morning, i have a question i cant seem to find the answer to. please see attached drawing. it is the screen capture from graphics display. My alignment is level y minus to plane 2. rotate cyl 1 to x plus about y minus, origin y to plane 2, origin x and z to cyl 2. My problem is when i measure 2d distance from plane 2 to circle 2 parallel to y axis i get 7.3093. when i measure TP of circle 2 using only y and z as datums i get 7.3188 as y distance which is hrowing TP out to .018. ive noticed this difference many times but only .0003 to .0015 difference. this .009" difference is throwing up a major red flag to me that im doing something wrong. if my y axis is cyl 2, and in tp cyl 2 is primary datum, why would there be any difference in the calculation of the distance. using perp to centerline makes no difference in readings. i have made sure i am in the correct workplane ( x plus)thanks in advance for any help.

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