topic Re: A strange problem with calibrating a canvas. in Fusion Design, Validate & Document Forum

A strange problem with calibrating a canvas.

lemelman — Sun, 12 Oct 2025 07:15:30 GMT

Step 1. I insert a canvas. Its a scan of a drawing on a piece of graph paper. It looks fine.

Step 2. I go to calibrate it, and choose a section of the graph paper accordingly. Before pressing Enter it looks fine.

Step 3. After pressing Enter the image is truncated. Why. What did I do wrong. What setting have I missed?

Re: A strange problem with calibrating a canvas.

TheCADWhisperer — Sun, 12 Oct 2025 07:25:17 GMT

@lemelman

Can you Attach the original image file here?

There is a known issue that might be as simple as screen capture or save in image editor.

Re: A strange problem with calibrating a canvas.

lemelman — Sun, 12 Oct 2025 07:43:52 GMT

Sorry, I should have thought of including the actual image. Here it is...

Re: A strange problem with calibrating a canvas.

jhackney1972 — Sun, 12 Oct 2025 16:49:54 GMT

I do not see an issues with the Canvas Calibration. Animated GIF below.

Re: A strange problem with calibrating a canvas.

TheCADWhisperer — Sun, 12 Oct 2025 19:29:12 GMT

@lemelman

No issue here.

Can you reproduce the issue in a new file and attach the *.f3d file here?

Re: A strange problem with calibrating a canvas.

lemelman — Mon, 13 Oct 2025 11:14:35 GMT

Well! that was a strange one.

Thanks to you all it is now solved, in the sense that I've successfully calibrated the canvas.

I followed the suggestion to try it on a new file, and of course it worked. I then tried again in my original file - and it failed again. But I don't really know why. If you're interested, here's the story.

Well actually, I still don't know why, but here's what I found out. The original file is a model of a kick-drum pedal that I'm using to create a mechanism to enable a dwarf to play the drums. If he sits at the right height to play the side drums etc he can't reach the kick-drum pedal, which has to attach to the bottom of the kick-drum. The actual pedal is inclined at an angle which I modelled by sketching its side profile on the X-Z plane. I then extruded the profile to get a basic slab onto which I sketched the actual profile which came from a traced canvas. I completed the model and made the actual mechanism, and everything was fine, until I discovered he also wanted a to use the high-hat pedal too.

So, I obtained a tracing of the new pedal profile, and decided to modify the model with the new tracing, which I placed on the X-Y plane. When I tried calibrating it, it failed as already posted. I'd forgotten that I'd placed the original canvas on the face of the extruded original pedal, so there was no construction plane for it. When I remembered what I'd done, I placed the canvas on the same plane as the original canvas, and it worked.

But I still don't know why it fails on the X-Y plane. Any ideas?

Re: A strange problem with calibrating a canvas.

TheCADWhisperer — Mon, 13 Oct 2025 18:07:52 GMT

@lemelman

I would fully define all of my sketches and resolve any issues as they occur...

Re: A strange problem with calibrating a canvas.

laughingcreek — Tue, 14 Oct 2025 01:59:35 GMT

a "section analysis" will hide a canvas. turn your analysis folder off-