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Under defined Box, won't turn Black
gary_cummings
Member Posts: 4 ✭
Hello, Forgive the stupid question, I have seen this has been asked before, but I don't know how to achieve the answer.
Basic Rectangle, part 2 of project. Its simply a lid for a the box which is Part1.
Both sides defined, but rectangle remains blue.
One answer for proviso user was " Fix it relative to the Origin" which seemed to work for the OP, but I don't undertones what that means or how to do it…
Top Plane is selected in the Sketch plane, both sides defined to the same as the main box.
Im really new, one of my first attempts at printing, and I'm finding On Shape so daunting and unintuitive, for example the message, "Sketch not fully defined" but no info on what to define, its only a rectangle with two sides to define…..Pulling my hair out…..
Thanks for helping a total newb.
Answers
Welcome to Onshape! Geometry within a sketch needs to be constrained not only by it's size, but also it's location. So when you draw a rectangle, you need to dimension or constrain the length and height as well as the position and rotation relative to something. Often, it is convenient to dimension it to the origin point of the part studio.
Here is a great way to learn and become efficient at Onshape.
Take the CAD Basics then the Onshape Fundamentals Learning Pathways.
These will teach you everything you need to know 😎
Learn more about the Gospel of Christ ( Here )
CADSharp - We make custom features and integrated Onshape apps! Learn How to FeatureScript Here 🔴
thank you for the reply Michael.
I am so new to this that I don’t understand what you mean dimension into the origin of part studio?! You may as well have written that in Russian for all the sense it means to me. How do I do that exactly? I may be able to work it out if I even understood the terminology.
I’m watching a you tube video and working along side it, I’ve done the same steps as the video but his is black and mine is blue.
Thanks
Gary
Consider the degrees of freedom your rectangle has. Assuming the sides are constrained to be horizontal or vertical:
You've constrained #1, leaving #2.
You have several options. You can drag one of the vertices onto the origin, which should create the coincident constraint, which will constrain the rectangle's movement. Often, dragging one thing onto another will implicitly create the constraint you want. You can also, say, use the dimension tool (shortcut is
d) to specify the distance between the origin and a pair of sides. Each will constrain movement in a specific direction.If you hope to understand the terminology that others speak of, its best to run through the basic courses of the learning center. Can you link youtube video for reference? basically michael is saying you need to dimension the location of the rectangle with respect to the origin of the design or in relation to other parts of the model if they already exist. basically so the program knows that your don't want the rectangle 100 feet way from where it currently in case something upstream of the that feature changes.
@gary_cummings - Remember when you start a new sketch, The origin is the only thing that is fixed in 3D space, and at least one piece of geometry needs to be 'anchored' to it, or your sketches will never be fully constrained. This 'anchoring' can be done with constraints, dimensions, or a combination of the two. I would also like to say, that all the above suggestions, seem valid as well.
@ gary_cummings Constraints are one of the more confusing things for beginners to get a handle on. You need to know what they are, and how they are used. Search "working with constraints" in the help section - or take the free beginner classes in the "learning center". I suggest you start a practice sketch and play with all of the various types of constraints (create lines, arcs, and points, then "constrain" them together) and do this over, and over. Get a feel for the different way, that each type works. While you are learning, you might want to check the "show constraints" box, in the sketch user interface (UI).
You must also learn about inferring constraints at the time of geometry creation ( this can cause trouble if you do it without knowing - and is one of the tougher things to track down and correct later). Spend some time to learn this skill - it is important. This subject is not to hard to understand - but is very hard to describe, using only words.
Not sure which YouTube video your watching, but without following Onshape's free courses or Learning Pathways with those courses, it will be difficult for you to know how Onshape works and how to understand and use it efficiently. Onshape made them to speed up your modeling not to slow you down =)
Learn more about the Gospel of Christ ( Here )
CADSharp - We make custom features and integrated Onshape apps! Learn How to FeatureScript Here 🔴