I have a program that checks a small distance of .09. One surface has two features: The start surface gets hit as a line from the side(LINE3), and from the front as a plane(PLANE5). The second surface gets hit from the front as a plane(PLANE8). The dimension should be .09. I check 2D distances and 3D distances from plane to plane, and from line to plane. All of them end up coming up with some weird numbers ranging from .03 to .29. Why would that happen?
Demented Dimensions
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probably needs to be 2d and try and make it perp. or parallel to the x or y axis...which ever one works.
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Originally posted by operator1 View PostI have a program that checks a small distance of .09. One surface has two features: The start surface gets hit as a line from the side(LINE3), and from the front as a plane(PLANE5). The second surface gets hit from the front as a plane(PLANE8). The dimension should be .09. I check 2D distances and 3D distances from plane to plane, and from line to plane. All of them end up coming up with some weird numbers ranging from .03 to .29. Why would that happen?
I'd still examine the workplane though.
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Originally posted by operator1 View PostI have a program that checks a small distance of .09. One surface has two features: The start surface gets hit as a line from the side(LINE3), and from the front as a plane(PLANE5). The second surface gets hit from the front as a plane(PLANE8). The dimension should be .09. I check 2D distances and 3D distances from plane to plane, and from line to plane. All of them end up coming up with some weird numbers ranging from .03 to .29. Why would that happen?
WHat are you dimensioning here (which features and in what order to what axis)?Bill Jarrells
A lie can travel half way around the world while the truth is putting on its shoes. - Mark Twain
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I create the features by taking hits on the part itself. I take hits on the surface twice: Once to create a line, and once to create a plane. I did that because I've been having problems with this dimension for the longest, and I figured maybe I'd get better results for the dimension if I used a line. Now, I don't know what to do other than create a whole bunch of dimension distances and pick the one that gets closest to .09.
I'm dimensioning a step in the part that has a distance of .09 inches. The part is sitting up, and the surfaces are hit in the positive Y axis(I believe). I take the hits for the line with the tip at A90B0. I take the hits for the plane at A90B90. When I take the hits for the line, the workplane is Yminus. When I take the hits for the plane, the workplane is X minus.I feel a lot better now that I've lost my mind.
Global Activ
PCDMIS CAD ++3.5 MR2
Comment
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Originally posted by operator1 View PostI create the features by taking hits on the part itself. I take hits on the surface twice: Once to create a line, and once to create a plane. I did that because I've been having problems with this dimension for the longest, and I figured maybe I'd get better results for the dimension if I used a line. Now, I don't know what to do other than create a whole bunch of dimension distances and pick the one that gets closest to .09.
I'm dimensioning a step in the part that has a distance of .09 inches. The part is sitting up, and the surfaces are hit in the positive Y axis(I believe). I take the hits for the line with the tip at A90B0. I take the hits for the plane at A90B90. When I take the hits for the line, the workplane is Yminus. When I take the hits for the plane, the workplane is X minus.
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Originally posted by operator1 View PostI create the features by taking hits on the part itself. I take hits on the surface twice: Once to create a line, and once to create a plane. I did that because I've been having problems with this dimension for the longest, and I figured maybe I'd get better results for the dimension if I used a line. Now, I don't know what to do other than create a whole bunch of dimension distances and pick the one that gets closest to .09.
I'm dimensioning a step in the part that has a distance of .09 inches. The part is sitting up, and the surfaces are hit in the positive Y axis(I believe). I take the hits for the line with the tip at A90B0. I take the hits for the plane at A90B90. When I take the hits for the line, the workplane is Yminus. When I take the hits for the plane, the workplane is X minus.
Again, What are you dimensioning? Which features? What order? (These questions are important)Bill Jarrells
A lie can travel half way around the world while the truth is putting on its shoes. - Mark Twain
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Originally posted by operator1 View PostI create the features by taking hits on the part itself. I take hits on the surface twice: Once to create a line, and once to create a plane. I did that because I've been having problems with this dimension for the longest, and I figured maybe I'd get better results for the dimension if I used a line. Now, I don't know what to do other than create a whole bunch of dimension distances and pick the one that gets closest to .09.
I'm dimensioning a step in the part that has a distance of .09 inches. The part is sitting up, and the surfaces are hit in the positive Y axis(I believe). I take the hits for the line with the tip at A90B0. I take the hits for the plane at A90B90. When I take the hits for the line, the workplane is Yminus. When I take the hits for the plane, the workplane is X minus.
Doa Dimension. Select the line as feature 1 and the plane as feature 2 and do a 2D to Feature. It should report what you want.Last edited by Wingman; 08-02-2007, 03:05 PM.Bill Jarrells
A lie can travel half way around the world while the truth is putting on its shoes. - Mark Twain
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Code:startup =alignment/start,recall:, List= Yes Alignment/end Loadprobe/rickab Tip/t1a45b0, Shankijk=0, 0.7071, 0.7071, Angle=0 Mode/manual Prehit/ 0.115 Retract/ 0.08 Check/ 0.4724,1 Movespeed/ 80 Scanspeed/ 2 Fly/on,0.1181 Workplane/zplus Mode/dcc Move/point,4.6723,5.0707,-26.4326 Move/point,4.6744,5.0701,-26.4348 Move/point,3.9318,2.3271,-27.0053 Workplane/yminus Plane1 =feat/plane,rect Theo/3.6771,1.7843,-27.9638,0.0879913,0.996056,0.0114045 Actl/3.6834,1.8513,-27.9627,0.0815022,0.996609,0.0113111 Meas/plane,6 Hit/basic,3.7494,1.7691,-27.1916,0.0879913,0.996056,0.0114045,3.7558,1.8371,-27.1904,use Theo = Yes Hit/basic,4.4326,1.717,-27.921,0.0879913,0.996056,0.0114045,4.4395,1.7886,-27.9197,use Theo = Yes Hit/basic,4.3321,1.7335,-28.5849,0.0879913,0.996056,0.0114045,4.3388,1.8049,-28.5837,use Theo = Yes Hit/basic,3.4229,1.8125,-28.4597,0.0879913,0.996056,0.0114045,3.4291,1.8778,-28.4587,use Theo = Yes Hit/basic,2.9621,1.8497,-28.1565,0.0879913,0.996056,0.0114045,2.968,1.9121,-28.1556,use Theo = Yes Hit/basic,3.1632,1.8239,-27.4692,0.0879913,0.996056,0.0114045,3.1693,1.8873,-27.4682,use Theo = Yes Endmeas/ Move/point,3.4095,3.0611,-27.4683 Move/point,2.2989,3.0609,-27.4683 Plane2 =feat/plane,rect Theo/2.3856,2.1601,-27.9503,0.0886756,0.9959911,0.0117585 Actl/2.3913,2.2182,-27.9493,0.0804077,0.9966817,0.0126568 Meas/plane,3 Hit/basic,2.4068,2.1546,-27.6437,0.0886756,0.9959911,0.0117585,2.4126,2.2126,-27.6427,use Theo = Yes Hit/basic,2.3347,2.165,-27.9791,0.0886756,0.9959911,0.0117585,2.3404,2.2226,-27.9781,use Theo = Yes Hit/basic,2.4151,2.1608,-28.2281,0.0886756,0.9959911,0.0117585,2.4209,2.2193,-28.227,use Theo = Yes Endmeas/ Move/point,2.4263,3.2257,-28.2271 Move/point,7.056,3.4663,-17.0872 Tip/t1a90b0, Shankijk=0, 1, 0, Angle=180 Move/point,4.182,8.2645,-12.7042 Move/point,4.182,8.2637,-23.1912 Move/point,4.182,3.6858,-23.1913 Move/point,3.2418,3.6863,-27.9389 Move/point,3.7961,2.4245,-27.9391 Circle1 =feat/circle,rect,in,least_sqr Theo/3.7496,1.6987,-27.9234,0,-1,0,0.49 Actl/3.7151,1.6987,-27.909,0,-1,0,0.4987 Meas/circle,6,workplane Hit/basic,3.8104,1.7245,-28.1633,-0.2455996,0,0.9693714,3.8138,1.7245,-28.1396,use Theo = Yes Hit/basic,3.559,1.7379,-28.0807,0.7712046,0,0.6365874,3.554,1.7379,-28.0979,use Theo = Yes Hit/basic,3.5943,1.6915,-27.7291,0.6242214,0,-0.7812475,3.5778,1.6915,-27.7001,use Theo = Yes Hit/basic,3.7594,1.6835,-27.6779,-0.0396282,0,-0.9992145,3.7707,1.6835,-27.666,use Theo = Yes Hit/basic,3.9736,1.6837,-27.8162,-0.9020122,0,-0.4317106,3.953,1.6837,-27.8361,use Theo = Yes Hit/basic,3.9496,1.6712,-28.0688,-0.8089788,0,0.5878378,3.923,1.6712,-28.0459,use Theo = Yes Endmeas/ Move/point,3.7488,1.6025,-27.9343 Circle2 =feat/circle,rect,in,least_sqr Theo/3.7406,1.56,-27.9278,0,-1,0,0.49 Actl/3.7071,1.56,-27.9106,0,-1,0,0.5005 Meas/circle,5,workplane Hit/basic,3.4907,1.6024,-27.9361,0.9994537,0,0.0330498,3.4589,1.6024,-27.9428,use Theo = Yes Hit/basic,3.6509,1.6024,-27.6937,0.3578827,0,-0.9337666,3.6489,1.6024,-27.6674,use Theo = Yes Hit/basic,3.9605,1.6024,-27.8076,-0.8772652,0,-0.480006,3.9438,1.6024,-27.8282,use Theo = Yes Hit/basic,3.9768,1.5945,-28.0101,-0.9443595,0,0.328915,3.9408,1.5945,-27.9991,use Theo = Yes Hit/basic,3.7291,1.3984,-28.1785,0.0460242,0,0.9989403,3.7405,1.3984,-28.1588,use Theo = Yes Endmeas/ Cyl1 =feat/cylinder,rect,out,least_sqr Theo/3.7373,1.5593,-27.9269,-0.0861426,-0.9960744,-0.020376,0.49,0.3321 Actl/3.7042,1.5638,-27.9113,-0.0783176,-0.9968276,-0.0141804,0.4998,0.3311 Constr/cylinder,bf,circle1,circle2,, Move/point,3.7314,1.9961,-27.9292 Move/point,3.7314,2.2882,-26.3742 Move/point,3.2276,2.2856,-26.8154 Move/point,3.2317,1.7098,-26.3079 Circle3 =feat/circle,rect,out,least_sqr Theo/3.7452,1.6296,-27.9224,0,-1,0,2.135 Actl/3.7216,1.6296,-27.8964,0,-1,0,2.1068 Meas/circle,5,workplane Hit/basic,3.1553,1.7098,-27.0443,-0.5575899,0,0.8301166,3.1366,1.7098,-27.0167,use Theo = Yes Move/circular Hit/basic,3.7238,1.6763,-26.8641,-0.0201946,0,0.9997961,3.7223,1.6763,-26.8468,use Theo = Yes Move/circular Hit/basic,4.2571,1.626,-26.9953,0.4833295,0,0.8754385,4.2543,1.626,-26.9965,use Theo = Yes Move/circular Hit/basic,4.5711,1.568,-27.2632,0.7815689,0,0.6238189,4.5764,1.568,-27.2564,use Theo = Yes Move/circular Hit/basic,4.7918,1.5679,-27.7625,0.9885252,0,0.151056,4.7609,1.568,-27.7653,use Theo = Yes Endmeas/ Move/point,5.0104,1.568,-25.0703 Move/point,2.1243,1.9877,-25.0702 Move/point,2.341,2.979,-25.8639 Move/point,2.3411,2.9539,-27.135 Move/point,2.2026,2.0105,-27.2627 Line1 =feat/line,rect,unbnd Theo/2.1658,2.0105,-27.517,0.999967,0,-0.0081234 Actl/2.166,2.0105,-27.4996,0.9999691,0,-0.0078623 Meas/line,2,workplane Hit/basic,2.1658,2.0105,-27.517,0.0081234,0,0.999967,2.166,2.0105,-27.4996,use Theo = Yes Hit/basic,2.4679,1.7277,-27.5195,0.0081234,0,0.999967,2.4682,1.7277,-27.502,use Theo = Yes Endmeas/ Move/point,2.4705,2.9441,-27.4226 Move/point,2.2705,2.8601,-28.5322 Move/point,2.2703,2.0234,-28.5323 Line2 =feat/line,rect,unbnd Theo/2.2728,2.0232,-28.3291,0.9994056,0,-0.0344725 Actl/2.273,2.0235,-28.3131,0.9997916,0,-0.0204146 Meas/line,2,workplane Hit/basic,2.2728,2.0232,-28.3291,-0.0344725,0,-0.9994056,2.2724,2.0231,-28.3131,use Theo = Yes Hit/basic,2.4697,1.7264,-28.3359,-0.0344725,0,-0.9994056,2.4695,1.7264,-28.3171,use Theo = Yes Endmeas/ Move/point,2.1075,2.4263,-28.5089 Move/point,1.843,2.7505,-27.6025 Move/point,1.7401,1.7802,-27.6025 Line3 =feat/line,rect,unbnd Theo/2.0122,1.8084,-27.6012,0.0235789,0,-0.999722 Actl/1.977,1.8084,-27.6023,0.021966,0,-0.9997587 Meas/line,2,workplane Hit/basic,2.0122,1.8084,-27.6012,-0.999722,0,-0.0235789,1.977,1.8084,-27.6023,use Theo = Yes Hit/basic,2.0268,1.9763,-28.2196,-0.999722,0,-0.0235789,1.9906,1.9763,-28.2205,use Theo = Yes Endmeas/ Point3 =feat/point,rect Theo/2.344,2.0168,-27.9254,0,0,1 Actl/2.3443,2.017,-27.908,0,0,1 Constr/point,mid,line1,line2 Line5 =feat/line,rect,unbnd Theo/3.7496,1.6987,-27.9234,-0.999999,0,-0.0013989 Actl/3.7151,1.6987,-27.909,-0.9999997,0,0.0007656 Constr/line,bf,2d,circle1,point3,, Move/point,1.0693,3.4936,-28.2208 A1 =alignment/start,recall:startup, List= Yes Alignment/level,yplus,plane1 Alignment/rotate,xminus,to,line5,about,yplus Alignment/trans,xaxis,circle1 Alignment/trans,zaxis,circle1 Alignment/trans,yaxis,plane1 Alignment/end Move/point,-2.8272,1.5499,6.1563 Move/point,6.9094,2.8179,16.4869 Move/point,6.9092,2.8181,16.4867 Tip/t1a90b-75, Shankijk=0.9404, 0.3402, -0.0013, Angle=-90.0081 Move/point,2.7849,3.818,9.1333 Move/point,2.5705,1.4066,0.8978 Move/point,0.127,0.6567,0.2881 Workplane/xplus Plane3 =feat/plane,rect Theo/-1.2689,0.1417,0.0476,0.94131,0.3375432,-0.0001427 Actl/-1.2645,0.1429,0.0478,0.9393597,0.3429317,0.001132 Meas/plane,4 Hit/basic,-1.2527,0.0967,0.3255,0.94131,0.3375432,-0.0001427,-1.2483,0.0979,0.3255,use Theo = Yes Hit/basic,-1.2859,0.1894,0.2183,0.94131,0.3375432,-0.0001427,-1.2821,0.1905,0.2186,use Theo = Yes Hit/basic,-1.2511,0.0921,-0.0754,0.94131,0.3375432,-0.0001427,-1.2463,0.0934,-0.0751,use Theo = Yes Hit/basic,-1.2857,0.1886,-0.278,0.94131,0.3375432,-0.0001427,-1.2812,0.1899,-0.2777,use Theo = Yes Endmeas/ Move/point,-0.7888,0.2376,-0.3328 Move/point,-0.7884,0.2777,2.7686 Move/point,0.6346,1.2255,13.6978 Tip/t1a90b22.5, Shankijk=-0.46, 0.8879, 0.0005, Angle=90.0165 Move/point,-5.7952,2.8389,13.6853 Move/point,-2.8055,2.2403,-0.412 Move/point,-1.7449,0.9714,0.1736
I feel a lot better now that I've lost my mind.
Global Activ
PCDMIS CAD ++3.5 MR2
Comment
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Code:plane4 =feat/plane,rect Theo/-1.6089,0.2045,0.0086,-0.4212736,0.9069329,0.001152 Actl/-1.6079,0.2024,0.009,-0.4233682,0.9059572,0.0009324 Meas/plane,4 Hit/basic,-1.5453,0.2337,0.3408,-0.4212736,0.9069329,0.001152,-1.5443,0.2318,0.341,use Theo = Yes Hit/basic,-1.6634,0.1791,0.0896,-0.4212736,0.9069329,0.001152,-1.6623,0.1769,0.0899,use Theo = Yes Hit/basic,-1.5679,0.2237,-0.1285,-0.4212736,0.9069329,0.001152,-1.5669,0.2217,-0.128,use Theo = Yes Hit/basic,-1.6591,0.1816,-0.2676,-0.4212736,0.9069329,0.001152,-1.658,0.1793,-0.2671,use Theo = Yes Endmeas/ Move/point,-1.965,0.6782,-0.2731 Move/point,-1.9645,0.705,1.8343 Move/point,-0.1772,1.3498,6.3495 Move/point,9.3861,2.2632,10.8248 Tip/t1a90b90, Shankijk=-0.9964, -0.0852, 0.0014, Angle=90.0076 Workplane/xminus Move/point,-3.7285,6.8505,10.7942 Move/point,-4.1506,-0.2714,0.9109 Move/point,-2.6552,-0.1088,0.2229 Workplane/xminus Plane5 =feat/plane,rect Theo/-1.8534,0.0291,0.0003,-0.9999997,0.000756,-0.0002314 Actl/-1.7407,0.0291,0.0007,-0.9999988,-0.0010654,-0.0010981 Meas/plane,4 Hit/basic,-1.8536,-0.0533,0.331,-0.9999997,0.000756,-0.0002314,-1.741,-0.0533,0.3311,use Theo = Yes Hit/basic,-1.8532,0.1256,0.1063,-0.9999997,0.000756,-0.0002314,-1.741,0.1257,0.1067,use Theo = Yes Hit/basic,-1.8533,-0.0412,-0.1334,-0.9999997,0.000756,-0.0002314,-1.7405,-0.0412,-0.1329,use Theo = Yes Hit/basic,-1.8534,0.0853,-0.3027,-0.9999997,0.000756,-0.0002314,-1.7404,0.0853,-0.3022,use Theo = Yes Endmeas/ Move/point,-2.3004,0.0503,-0.3024 Move/point,-2.2562,-0.4439,-0.296 Move/point,-1.9812,-0.4104,0.3952 Plane8 =feat/plane,rect Theo/-1.7598,-0.2897,-0.007,-0.9999958,-0.0028889,0.0002458 Actl/-1.6604,-0.2686,-0.0075,-0.9336143,-0.3579698,0.0148954 Meas/plane,4 Hit/basic,-1.7597,-0.2862,0.3091,-0.9999958,-0.0028889,0.0002458,-1.6514,-0.265,0.3086,use Theo = Yes Hit/basic,-1.7598,-0.2729,0.1006,-0.9999958,-0.0028889,0.0002458,-1.6723,-0.2519,0.1001,use Theo = Yes Hit/basic,-1.7597,-0.3262,-0.133,-0.9999958,-0.0028889,0.0002458,-1.6504,-0.3051,-0.1335,use Theo = Yes Hit/basic,-1.7599,-0.2736,-0.3049,-0.9999958,-0.0028889,0.0002458,-1.6674,-0.2525,-0.3052,use Theo = Yes Endmeas/ Move/point,-3.3475,-0.4277,-0.3131 Move/point,-3.391,-0.3102,9.0525 Tip/t1a0b0, Shankijk=0.0014, 0.0001, 1, Angle=4.8869 Move/point,1.6134,4.4803,17.0008 Move/point,3.0555,7.0399,17.8648 Dim Dist7= 2d Distance From Line Line3 To Plane Plane8 (center To Center), No_radius Units=in ,$ Graph=off Text=off Mult=10.00 Output=both Ax Nominal +tol -tol Meas Max Min Dev Outtol M 0.0900 0.0050 0.0050 0.0880 0.3985 0.3246 -0.0020 0.0000 --#------dim Dist2= 2d Distance From Line Line3 To Plane Plane8 (center To Center), No_radius Units=in ,$ Graph=off Text=off Mult=10.00 Output=both Ax Nominal +tol -tol Meas Max Min Dev Outtol M 0.0900 0.0050 0.0050 0.0880 0.3985 0.3246 -0.0020 0.0000 --#------ Dim Dist3= 3d Distance From Line Line3 To Plane Plane8, No_radius Units=in ,$ Graph=off Text=off Mult=10.00 Output=both Ax Nominal +tol -tol Meas Max Min Dev Outtol M 0.0900 0.0050 0.0050 0.0378 0.0482 0.0197 -0.0522 0.0472 <-------- Dim Dist6= 3d Distance From Plane Plane5 To Plane Plane8, No_radius Units=in ,$ Graph=off Text=off Mult=10.00 Output=both Ax Nominal +tol -tol Meas Max Min Dev Outtol M 0.0900 0.0050 0.0050 0.0314 0.0642 0.0033 -0.0586 0.0536 <-------- Dim Dist8= 2d Distance From Plane Plane5 To Plane Plane8 (center To Center), No_radius Units=in ,$ Graph=off Text=off Mult=10.00 Output=both Ax Nominal +tol -tol Meas Max Min Dev Outtol M 0.0900 0.0050 0.0050 0.2979 0.4606 0.2597 0.2079 0.2029 -------->
I feel a lot better now that I've lost my mind.
Global Activ
PCDMIS CAD ++3.5 MR2
Comment
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One thing I notice is that neither Plane 8 nor PLane 3 are SQUARE to your Alignment.
Looks like PLANE 3 is 0.040" out of Square over a small 3/8" area. Way off.
Looks like PLANE 8 is no better.
This would account for big differences between 2D and 3D values 'especially' since line 3 seems to be 27" away from it. Angles and projection build up quickly. Probably best to use 2D distance in a particular AXIS (X in this case) as 3D and 2D to Feature will take the angles of the plane into account. However, I would be seriously concerned about a 0.040" variation in the X Axis of any Feature.
HTH,Bill Jarrells
A lie can travel half way around the world while the truth is putting on its shoes. - Mark Twain
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Originally posted by Wingman View Post... since line 3 seems to be 27" away from it.
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