Issue with Resizing a Rectangle in CAD – Top and Bottom Move Symmetrically

[lukasdobis]

Hello, I need some help with something that seems really simple, but I just can’t figure it out and I’ve been stuck on it for hours. I’m modeling a screwdriver holder for my desk. Since I didn’t know the exact dimensions, I started with a 2-point rectangle, extruded it into 3D, and then added other features. Now that I have a rough model, I want to scale it down.

I know there are two options:

1. The easiest way would be to remove material using the extrude tool, but I don’t want to do that.
2. The second option, which seemed simple but where I got stuck, is to resize the rectangle.

I split it vertically into two parts and aligned them to the center. I adjusted the left and right sides individually, and now I want to adjust the height from the center as well—but it doesn’t work. Both the top and bottom edges move symmetrically, and I don’t understand why. I intentionally didn’t use a center rectangle at the start because I expected this issue, but I didn’t think it would happen with a regular rectangle. I didn’t set the top and bottom edges to be equal, only parallel, so I really don’t get what’s causing this. Thanks in advance!

My plan was to create a cross inside the rectangle, constrain it with right angles, center it in the sketch, and then adjust each side individually, simply put.

[g-andresen]

Hi,

please share the file for reply

File > export > save as f3d on local drive > attach to post

günther

[lukasdobis]

Here is 

[g-andresen · Accepted solution]

Hi,

delete midpoint constraint

günther

[jhackney1972 · Accepted solution]

Take a look at the attached video.  

If this answers your question, please select the "Accept Solution" on my post. If you need further help, please ask.

[lukasdobis]

Thanks  jhackney1972 and g-andresen all what is that triangle and why he put there automatickli ?

[jhackney1972]

Who is "he"?  Some sketch constraints are applied automatically if the condition is met.  You can prevent these automatic constraints by holding down the CTRL key (Command) key when sketching.

[lukasdobis]

Sorry, I am not a native English speaker. Thank you for your answer and explanation