Struggling with parametric modeling of a simple box

[andrewmcquillen]

I am very new to Fusion 360 and i thought i would cut my teeth on a very simple box design.

i wanted to include parametric modeling right from the get go so i could have this as common practice in future models i will create.

                                                                               So i created this model 

                                                                             https://a360.co/35DAh7w

                                                                     which i called "box that nearly works".

I have created parameters for all the major components and set about creating the box which consists of a base and 2 long and 2 short sides.

the parametric modelling works effortlessly on the two long sides i can change the box lenght at will and the base and the two sides change accordingly.

However the two short sides, when the parameter is changed, do some wierd stuff Picasso would be proud of.

I know this will be an easy one to repair so please someone put me out of my misery and tell me what i am doing wrong.

[TheCADWhisperer · Accepted solution]

Sketch8 is not fully defined?

For future reference - you can Attach a file directly here by going to File>Export to you local drive and then Attach the *.f3d file here.

If I move this unconstrained Sketch8 to the side - I see that you inadvertently selected the end face of the base to include in your Extrude Profile (note that it says 2 selected).  Ctrl un-select the base rectangle.

[andrewmcquillen]

Hi, Thank you so much for sorting me out with this issue i've redrawn the box and it worked a treat (I couldn't find a way to edit my drawing, that is my next challenge!). thanks again. Andrew.