I am having trouble figuring out how to establish Datum B (see attached). It creates that midline the red arrow points to, but it seems to be a line and a point. Does anyone have any advice on how to create that midline from a straight and curved feature?
UPDATE: SOLVED. See
neil.challinor's reply/following comments for how I created a tangent line from a circle point.
You have two datum target points for datum D (11.88 up from datum B). Datum D also needs to be a width feature - in this case a 1D width. You need to create an alignment levelled to A, rotated and translated to B. You then need to measure the R15 on each side of the part - I would use linear open scans and then construct curves from the scans. You can then intersect the curves with a generic plane (11.88 from B) to get your D1 & D2 points. Once you have D1 & D2, construct a 1D width feature and define it as datum D.
You have two datum target points for datum D (11.88 up from datum B). Datum D also needs to be a width feature - in this case a 1D width. You need to create an alignment levelled to A, rotated and translated to B. You then need to measure the R15 on each side of the part - I would use linear open scans and then construct curves from the scans. You can then intersect the curves with a generic plane (11.88 from B) to get your D1 & D2 points. Once you have D1 & D2, construct a 1D width feature and define it as datum D.
B is a width as well - 2D width this time (although to get to your D1 & D2 points you would only need the a line / plane on the bottom surface).
Level to A, rotate to the bottom B edge, linear open scan the upper B edge and then either use the MAXINDEX function or a constructed EXTREME point to find the high point. Once you have the high point, create a line, parallel to your lower datum B edge passing through the high point. Once you have both lines, construct a 2D width feature and define it as datum B. Here's some example code I created offline using using the Hexagon training block....
UPDATE: This worked perfectly, I am using 2020 R1 still so I couldn't use extreme point but I was able to create a generic point using MAXINDEX at the maximum Y value of my circle scan. X, Y, Z translated to that, then a line created from that alignment point to get the tangent.
