Pierre-Raymond,
It's a tyre for a band saw wheel.? I'll post photos once they're fitted which will better explain things, but imagine what you see in the photo stretched out to a circle and wrapped a wheel to become a tyre.? There are two wheels and the blade runs around the wheels.? The tyres help the blade grip the wheels and prevent the blade rubbing on the metal of the wheel.
John and Mike,
I worked out I needed an inner circumference of 1021mm and settled on 1018 or 9 can't remember.? I'm relying on the tyre being able to stretch a bit.
I drew it in Fusion.? In a Design Workspace Sketch there's a tool they call "Blend Curve".? Never used it before and from their description I wasn't quite using ti as intended.? From days when I used to do a lot of graphics I know this as?Bézier curve tool which draws a line with "nodes" and "handles" emanating from the nodes.
All I did was to draw the print area then approximately draw shape with the blend curve tool within the build area, clicking several times to generate nodes and then getting it as smooth as possible by manipulating with the handles.? It's pretty self explanatory once you start playing.? ?Not very scientific, but as I was smoothing the curve I kept using the measure tool which will give you the perimeter dimension of the shape.? Dragging a node towards the center will reduce the size and vice-versa, obvs!.? ?Just keep adjusting until you have the circumference you require.? There after it's? a simple matter of using "offset" to create the belt thickness and "extrude" its width.? Printing is fun ... it looks like a kiddies fair ground ride going round and round!
I'll try and fit it tonight and report back.
