Lofting Error Message

[Anonymous]

I am getting an error that I expect is a typo o sorts but just to be sure...

"The guide is not G1 between the first and last sections."

I am not sure what to do. I also notice in the drawing that when I try to select a line as a rail all the lines from that sketch are linked and are trying to be rails.

[davebYYPCU]

Not G1 means Not Tangent, 

prevent selecting multi segment rails by unchecking the chain select toggle, but that will generate errors if you have not selected all parts of the rail as you are selecting.

I find it best to make rails with one spline, one sketch per rail, unless the multiple rails don't connect to each other, 

So lofting to a point is best with a sketch for each rail that connects to that point, 

Might help....

[Anonymous]

That helps. I have been trying to make new sketch planes for curved lines but in this case I have perfect planes to create 2d sketches. I was able to get most everything resolved but I did not find a way to identify where a curved line intersects a perpendicular sketch plane. If I project it it projects as a line. If I zoom in a far as possible I can pick the point but that is not close enough for Fusion to let me loft with the sketch. The Heel Middle Profile in the attached sketch is an example. In this case I used two lofts but I was nt able to blend them in a way that could allow production. It was good enough for art but it could not be a final piece. I tried in the Sculpt environment as well but I could not figure out what tools to use to blend the two lofts together. I would like to make the part in a single loft. There is enough data there for me to make it by hand. The Neck to Heal Transition Plane was a band-aid attempt to get the lofts to blend. Normally I would omit that sketch when hand drawing this part.

[davebYYPCU]

I whipped this up, might help you get there, the Zebra shows it needs more tweaking, but I am not all that experienced with T-splines.

I basically made two surface lofts in T-Spline, with your profiles, 

then merged the mid intersecting lines,

then moved the corner back into position.

had to trim the over sized result in model space.

Most of the drama is coming from the 5 edged boundary, causing us to divide it into two, making 4 edges on both.

My give some ideas, 

[cekuhnen]

@Anonymous

You have a logic error: Rails go one direction. In your sketches rail 1 and 3 are fine however rail 3 is not logical = it is not a line from back to front but loops from back to front to back !!!

this is what you want - no chaining of rails !

On a side note, with the amount of bugs in the sketch engine, and the surface quality of the patch tool expect problems in Fusion with such a design at the moment

till tool deficiencies are solved such as loft has G1 G2 rails and sketch engine bugs are squashed.

a work around would be to use fillets between the to parts but the current surface quality will fail

build the two parts intersecting each other well so you can better join them and then you could fillet the 3 edges

ideally you want the vertical fillet to be done first so you have a ball corner

[WHolzwarth]

Hmm. I did a region cutoff and tried to close it with a patch. But none of the options worked.

After that I used Loft. Both Tangent or Smooth conditions worked very well.

[Anonymous]

Using all the ideas here, as well as I understand them so far, I was able to do a little better. The seam between the two lofts is better for 70% of the shape but there is still a dip towards the front of the merge where the joint sketch gets sharp. I also ended up rounding off the point at the bottom of the heel but that is also an acceptable guitar shape. Keeping that point sharp while sanding is a challenge anyway.