How do I constrain text to my model?

[HuntleyBill]

I am practicing parametric modeling. I created the attached file with parameters. When I change a parameter, the whole model changes size (as it should) with the exception of the letter. What do I need to do to get the letter to change size when I change a parameter. I'm not sure how to do this.

Thank you

Bill

[jhackney1972]

What you want to do is probably scale the text.  You could add dimensions to the letter but that is pretty tedious.  Take a look at the Screencast.  The issue is you have to apply the Scale command to a separate body, the letter, so I shifted the text to a separate body, then Combined it as a cut.  I just eyeballed the location of the text, you can add some keypoints to get it centered better.  Model is attached.  Edit: I made a bad statement in the video, you "can" add parameters to sketches, but you cannot add a parameter to the Scale sketch command.  That is why I had to create a new body to add the Scale to.

[HuntleyBill]

John, You are awesome! The only thing is, I want to be able to change the "hole size" perimeter therefore changing the size of the whole model including the text.. In your example, it does NOT change the text.  In other words, this model as it sits, will fit into a 19 mm hole. What if I need this to fit into a 10 mm hole? I want to just change the "hole size" perimeter and send it to the printer. In this setup, the model changes but the text stays the same size. Can that be done?

[jhackney1972 · Accepted solution]

Sorry I did not understand your request.  I have attached an new model, different name, with a small adjustment to the Test_Scale parameter.  It now take the HoleSize partmeter compares it against the existing diameter and determines the value.  It is quick and dirty but I hope you get the idea.  Please note, the reason I divide in the formula by 1mm is to change the resulting value to an integer without units for the scale command.

[HuntleyBill]

Thank you John. This worked perfectly.