Hello,
At first, thanks to reply. I try to explain it more:
TL;DR: I need some reliable way how to place point of the unconstrained sketch to origin. (To place using Move tool and projected origin seems not to be reliable). [end of TL;DR]
In the images above is sketch symbol and I wanted it in 0,0 because more beacause my OCD then something else.
BUT I'd like to use the precious positioning when placing pasted DWG data into sketch. It's really CTRL+C; CTRL+V, because link to DWG is unwanted. These DWG data are some (more or less) raw sketch created from old (often damaged) paper drawing. I create some "skeleton" sketch based on this data.
Problem is when DWG is not placed precisely. There isn't any dimension only some constraints (coincident) in the pasted data and when I start to add them it moves with affected geometry and changes round dimensions in not-yet-constrained pasted data for me (round dimension is very often dimension based on dimension written in old drawing - it's more relevant then other)
Better to explain on example:
I have "raw DWG" data of an rotational part. Paste them into Sketch then then start to constraining and dimensioning. Yes, I can to fully constraint the sketch to it's axis, but because this axis is not constrained lines keep to be green (not fully constrained). Also I'm rounding/changing some dimensions during this sketch creation and there (as far as | know) is no mechanism in Inventor to determine which line will stay on it's place and which will be moved when constraint is added. So it can't easily break the "fragile geometry" of the inserted data.
Yes, there is workaround:
- To fully constrain (by dimensions to the origin / Fix coinstraint) the axis before adding any other dimension/constraint.
Yes, is possible to work with axis not place in the origin, but I'm used to make rotational parts always around axis Z (it helps when creating another concentric geometry, circular patterns etc.). Yes, I can fully constrain the sketch ad then place make axis free and place it to the desired position without destroying rest of the sketch, but very often I need to do some priority work (and have axis in origin) when the sketch is not fully constrained yet.) - Create sketch block with fully constrained axis, then constraint the block to the origin (using the axis) and add all constraints inside the block.
BUT this add another step - to edit block every time when something changes (based on measurements).
I'd like to place the CAD data, move it to origin and then start to constraining and dimensioning (make axis constrained to the real origin without).
I tried it by placing data, use Move tool and select point on Data, then select the origin, BUT sometime it places it only very close to origin. (And then original Ø500 becomes Ø500,5 - for me it's sign that this dimension is guessed an could be slightly changed. This initially small error could make long chain and get bigger and bigger in every step.)
Inventor 2022, Windows 10 Pro
Sorry for bad English.