The power saw was designed for cutting metal (not wood), and the speed is slowed way down to about what you would comfortable saw if you are sawing for hours at a time.
I have never understood the desire for scroll saw makers to provide the ability to saw through a 2x4...the only reason to make such a short stroke. Because of the short stroke, they sped up the speed, which burns up the blade, as wood is a very poor conductor of heat, and the blade can dissipate only so much while you are sawing. Ever burned your self touching the blade of a jig saw?
The power saw uses the full stroke of the blade, saws slow enough that the heat is removed by air movement, and as a result, the blades last a lot longer. At maximum speed, it strokes at about 250 strokes per minute (which is hard to maintain by hand).
I have never chosen to be another "me too" kind of guy, and have always designed stuff that doesn't copy any one else. Some of it was a bit too far out and is gathering dust in the "archives". Someday, they may emerge when the world is ready.
Since I was starting with a clean sheet of paper, I wanted to make the blade track in a true vertical position, not describe some arc as the scroll saws do. That is why the blade guides are Delrin and provide support for the blade. Also, I designed carbide guides for the blade that support it from the rear and the sides, the support is exactly where you need it (right at the cutting edge). Imagine a band saw that uses 5 inch long blades.
Rather than tilt the table for angular cuts, the frame itself tilts 45 degrees to the Right or the Left, and the table stays stable.
Tensioning is micro-adjustable for repetitive blade changes.
Enough of this.
As mentioned in an earlier post, each of you here are also tool makers, and it feels good to sit down with you and be accepted.
Lee (the saw guy)