Extruded piece makes two pieces

[ashjunkmail]

Hello, I'm new to fusion and i'm trying to do the following:

1. I have two downloaded .stl's that I would like to combine into one.

2. I imported them as Mesh I aligned the smaller piece on the back side of the longer piece.

3. I extruded the rear piece 1mm longer on the left, and 1 mm longer on the right so that it extends the full length of the front piece 

4. I moved (joined) the rear piece so that the front is flush with the front face of the front piece. (this is because the front piece has a fillet edge, and I think this is the easiest way to get rid of that edge and make a seamless piece?)

The Issue I'm having is that even though the rear piece was extruded (joined), it's still shows as 2 pieces, which makes it so I can't re-fillet the edges without getting this error:

[TheCADWhisperer]

@ashjunkmail 

Can you File>Export your *.f3d or @*.f3z file to your local drive and then Attach it here to a Reply?

[ashjunkmail]

hello TheCadWhisperer, please see attached

[ashjunkmail]

 Hello, just checking to see if anyone has a minute to take a look and let me know what i'm doing wrong?

[jhackney1972 · Accepted solution]

I do not know why you have an External Assembly, the ProSlat Base Only component is not being used so I removed it.  The remain component can accept Fillets on the corners.  Model is attached.

[ashjunkmail]

Thanks for taking a look John, just so I understand what you did, was it just a combine tool that you used? I'll need to do the same thing for multiple different pieces, just learning very slowly.

[ashjunkmail]

Thank you John, that worked perfect