Got a little more work done on this step ladder I am making. It is progressing slowly as I haven’t had much time recently.
Yesterday, once I had set the level of the top step with the ladder in the open position I was able to drill my peg holes in the side of the step.
Once that was compete I inserted a mock-up peg in the holes allowing me to mark the bottom position of the peg. From that point I taped a piece of pencil onto the peg and made a mark for the correct arc.
Using a piece of 5mm ply inserted between the peg and outer leg to get that arc marked.
Here you can see the pencil mark clearly.
However I don’t need, and neither want a complete arc. Rather I want an arc just up until the arc reaches the apex. From the point the apex breaks and the arc moves inward I want a straight line so that the ladder closes on itself when the spread legs are pulled together. I will clean up this template a little more and then glue it to a piece of hardwood to make a perfect template from which I can route out the tracking on the legs of the ladder.