This is a very dumb question, but I just can't seem to figure out how to do it or find instructions.
How do you manage the placement of a sketch or pad on the base axis in Part Design? I created a circle sketch and then padded it to make a column. I would like to move the column to a specific location on the base axis (ie. X=5,Y=2,Z=1). If I select the pad, it is not possible to open up the placement values because they are greyed out. If I click on the sketch, I can open placement, and I can shift its location in the X,Y,Z directions, but how do I place it exactly at a specific coordinate?
Can't figure out placement
Forum rules
and Helpful information
and Helpful information
IMPORTANT: Please click here and read this first, before asking for help
Also, be nice to others! Read the FreeCAD code of conduct!
Also, be nice to others! Read the FreeCAD code of conduct!
Re: Can't figure out placement
Welcome to the FreeCAD forum
You can change the location of the pad through its base sketch placement properties.
You can change the location of the pad through its base sketch placement properties.
Need help? Feel free to ask, but please read the guidelines first
- wandererfan
- Veteran
- Posts: 6326
- Joined: Tue Nov 06, 2012 5:42 pm
- Contact:
Re: Can't figure out placement
A sketch's Placement.Position corresponds to the origin in the original sketch. So if your feature is displaced from the origin, you'll have to translate the sketch Placement.Position to locate the feature exactly where you want it. The arithmetic is easier if the sketch is centred on the origin.BenW wrote:I can shift its location in the X,Y,Z directions, but how do I place it exactly at a specific coordinate?
The sketch is move 50 left and 15 up in the last picture.
Re: Can't figure out placement
Not what you asked, but you also could have created a default Cylinder, then change the Properties for Radius and Height, and change the Placement Properties to move it,BenW wrote:I created a circle sketch and then padded it to make a column. I would like to move the column to a specific location on the base axis (ie. X=5,Y=2,Z=1).
Re: Can't figure out placement
Thanks a lot wandererfan. Two followup questions. How do you center the sketch on the origin from the start? When I draw the sketch, it takes a steady hand to get it perfectly on the origin. And, how did you figure out that the exact X-displacement was 50.0? I can move it by trial-and-error, but I want it to be exact.wandererfan wrote:Position corresponds to the origin in the original sketch. So if your feature is displaced from the origin, you'll have to translate the sketch Placement.Position to locate the feature exactly where you want it. The arithmetic is easier if the sketch is centred on the origin.
Re: Can't figure out placement
To answer your first question, you simply constrain the sketch to the center. In the case of a circle you would just use a coincident constraint between the circles center and the Sketch origin point. If it were a square or rectangle, you would use the symmetry constraint between opposing corners, like bottom left/upper right or other way around.BenW wrote:Thanks a lot wandererfan. Two followup questions. How do you center the sketch on the origin from the start? When I draw the sketch, it takes a steady hand to get it perfectly on the origin. And, how did you figure out that the exact X-displacement was 50.0? I can move it by trial-and-error, but I want it to be exact.wandererfan wrote:Position corresponds to the origin in the original sketch. So if your feature is displaced from the origin, you'll have to translate the sketch Placement.Position to locate the feature exactly where you want it. The arithmetic is easier if the sketch is centred on the origin.
Second question leaves me to a question of my own, "exact" to what? Placement puts the part, or in this case, Sketch, exactly where it says it is,
Mark
This post made with 0.0% Micro$oft products - GOT LINUX?
- wandererfan
- Veteran
- Posts: 6326
- Joined: Tue Nov 06, 2012 5:42 pm
- Contact:
Re: Can't figure out placement
Use a coincidence constraint to make your circle centre match the origin.BenW wrote:[How do you center the sketch on the origin from the start? When I draw the sketch, it takes a steady hand to get it perfectly on the origin.
Horizontal distance constraint: Shaky hands aren't really an impediment when using sketcher. Just lay out the design in a more/less correct fashion, then use the constraints to make everything line up correctly.BenW wrote:And, how did you figure out that the exact X-displacement was 50.0? I can move it by trial-and-error, but I want it to be exact.
wf
Re: Can't figure out placement
I'd also like to add that the documentation already explains much about sketches.
Sketcher Workbench
There are also a few Youtube tutorials, quite a few by regular users here.
Sketcher Workbench
There are also a few Youtube tutorials, quite a few by regular users here.
Re: Can't figure out placement
Thanks a lot. I seem to be able to position my sketches correctly using constraints now. I feel like I tried this before and it wouldn't let me select the origin, but it is working now easily. Thanks.
Here is a followup related question. How is it possible that the two attached pictures have different constraints? One has X=25 and Y=10. The other has X=-25 and Y=-10. I think I'm looking at the same perspective, and when I merge them together they are perfectly centered on each other. Why is this?
Here is a followup related question. How is it possible that the two attached pictures have different constraints? One has X=25 and Y=10. The other has X=-25 and Y=-10. I think I'm looking at the same perspective, and when I merge them together they are perfectly centered on each other. Why is this?