Curved loft creation

[CHARLESTBT3B]

This is my first time using Fusion, so I'm not sure of all the terminology yet. I am trying to replicate a ZX80 case and have started on the top part. All is going well, apart from the fact that I am stuck trying to replicate the curvature of the top block. As you can see in the image posted, the curve is more pronounced from the bottom to the top, whereas the loft I used in Fusion is pretty much at the same angle throughout.

Can anyone advise how to replicate the original more closely? I have attached my work so far. Hopefully, I haven't done it all in a ridiculously stupid way. I have tried to use parameters as much as possible, and offsetting planes.

[Drewpan]

Hi,

What you have done so far looks ok but your workflow is slightly puzzling. You seem to have created a bunch of planes

that are not really necessary and essentially you are creating a bunch of blocks on top of each other the hard way.

If you have the original then modeling this is pretty straight forward. Take a top, front and side picture and import

them as a canvas on the three plane axes. Then it is just simply drawing boxes around the canvas and extruding them

into blocks. Then you use the tools to get the fillets and chamfers set up right. Finally you can shell the shape and end

up with what you want. Don't forget to calibrate the canvases to the correct size and a common point to line everything up.

In terms of the slight flaring at the bottom of the top section, I would draw a sketch of the flare from side on and then

use it to extrude the top section. It is just a box with flared edges.

I have used a spline to create the flare, it isn't quite right, and just simply line it up with straight sides and top. Extrude

it from the front to the back then use the fillet tools to get the curves even.

The flare is subtle but it is there. I don't think it was deliberate, probably just an artefact from the fabrication process.

Cheers

Andrew

[CHARLESTBT3B]

Thanks for the guidance. As I said, this is my first time using it, so I didn't know the correct workflow to use; yours sounds sensible; however, is there any guidance to tutorials or videos that explain what you are suggesting that you recommend? I do have the original, so I can photograph it in all dimensions to help me. I need all the measurements to be exact to the original, so I presume while sketching, I can use parameters to help me.

[Drewpan]

Hi,

Basically if you have the three views you can use them as a guide for what you want to model. All you need for a

canvas is a suitable picture and the original is a good start. When you import the canvas, all you are doing is putting

it into the model space. It isn't really useful until you calibrate the size of the pictures and line up a common point.

As you can see, you use the canvas as a guide.

To be honest, what you really need is just a good top view. Just sketch all of the boxes around the extruded parts and

get the basic shape. You have the measurements so you will be close.

I would start simply like this.

Instead of creating planes, just create a sketch on the face you want to do an extrude cut to sculpt. You can also use

split body and combine. It is just about getting it as close as possible then use fillets and chamfers to finish off.

Cheers

Andrew