Welcome to the Onshape forum! Ask questions and join in the discussions about everything Onshape.
First time visiting? Here are some places to start:- Looking for a certain topic? Check out the categories filter or use Search (upper right).
- Need support? Ask a question to our Community Support category.
- Please submit support tickets for bugs but you can request improvements in the Product Feedback category.
- Be respectful, on topic and if you see a problem, Flag it.
If you would like to contact our Community Manager personally, feel free to send a private message or an email.
Options
Line Angle plane: angle to what?
laird_broadfield
Member Posts: 42 ✭✭
The implication in the help for Plane (https://cad.onshape.com/help/index.htm#cshid=cplane) is that the angle is to the plane that hosts the line. My experiments, however, suggest that the angle is to the global system.
Here's my experiment:
I put a line on the Top plane, a plane at 30 deg to that, a second line, and a line at 60 deg to that. What I want is to specify that "plane on second line" is at X degrees from the plane that hosts Second Line, so that if I adjust the first plane, the change follows. What I'm getting is that plane on second line is at X degrees from global flat.
How can I get what I want... or how am I conceptualizing this wrong?
(Experiment at https://cad.onshape.com/documents/27349a7d22794a6a993806f6/w/744e07fcdbd144cdace550d7/e/c3147f1d0e1e439b89174b52 if anybody wants it.)
Here's my experiment:
I put a line on the Top plane, a plane at 30 deg to that, a second line, and a line at 60 deg to that. What I want is to specify that "plane on second line" is at X degrees from the plane that hosts Second Line, so that if I adjust the first plane, the change follows. What I'm getting is that plane on second line is at X degrees from global flat.
How can I get what I want... or how am I conceptualizing this wrong?
(Experiment at https://cad.onshape.com/documents/27349a7d22794a6a993806f6/w/744e07fcdbd144cdace550d7/e/c3147f1d0e1e439b89174b52 if anybody wants it.)
0
Best Answer
-
Optionsandrew_troup
Member, Mentor Posts: 1,584 ✭✭✭✭✭
Bug or feature, it's well short of Onshape-quality, to my way of thinking6
Answers
I entirely agree with you, @laird_broadfield : to my mind, this is a serious deficiency, one of several in the current implementation of planes in Onshape.
I've previously raised this under "Feedback" with the folks at Onshape Support, and I suggest others do the same if it affects them.
It's a major stumbling block for me, since the current lack of 3D sketch capability makes planes indispensable in models which would otherwise not require them.
I think that the default reference plane for the angle should be the plane on which the sketch line lies (as you suggest), but ideally it should alternatively be possible, using the same tool, to select an arbitrary plane or face as the ref or datum plane, and/or use a linear (solid) edge rather than a line.
For me, this is the most commonly used plane creation tool, and it needs to work as well as possible.
I would personally prefer the default angle (measured from the sketch or reference/datum plane as above), to be 90 degrees for a newly created plane (rather than, as in Solidworks, the last angle used), but this is a minor consideration.
Given that the Create Plane object selector already accepts multiple selections, one could just add both the line and the line's host plane as a way to specify the preferred reference without losing backwards compatibility. (Indeed, in the midst of typing my note, I thought of that and went back to check if that was the method, because it seemed so obvious once I'd thought of it.)
step1: creat sketch 1, draw a line on the front plane ,and give the value 60 degree for the angle between this line and X axis.
step2: creat plane 1 with this line and give 0 degree for angle value by "line angle".
step3: reedit sketch 1,change the angle from 60 degree to 30 degree
step4: we can see the vector of plane 1 will rotate 90 degree.
I would really like to set also angles when creating a plane in offset to another plane. I don't like to create sketch for driving a simple say 45 deg to normal plane.
If it's not clear from the above comments... We want local angles.
With local angles it's easy to create the effect of global angles using the core reference planes. With global angles it's not easy to create the effect of local angles.