|
Nice changes there, Marc.
Have you ever considered using spring washers instead of wire compression springs? I've moved away from wire springs as they are directionally unstable, and introduce unwanted lateral forces to the cell that can shift the cell laterally. In the picture you've uploaded, I can see the spring is terribly distorted as its been loaded, and highly crushed. Spring washers are unidirectional, meaning that you not only don't get lateral stresses, the entire strain on the spring is being made use of, and spring washers are shorter vertically so the mirror ultimately sits deeper inside the mirror cell.
Depending on the way you arrange the washers, you can maintain the same load capacity, double it or treble it just with their combination. Yet their vertical dimension is bugger all. To give you an idea, the 25mm spring washers I'm using on a 12" scope I'm building are 0.5mm thick, and a total height of less than 1.5mm. Yet they are rated at 25kg for a 75% dimension compression. Sit another spring washer inside it, and this becomes 50kg. Have two washers touching lip to lip or hub to hub, and it is still only 25kg.
Something to consider.
Alex.
|