Sounds interesting Hamish.
Do you have an image of your test rig.?
I have some scannner stepper motors and belts lying around.
Quote:
Originally Posted by hamishbarker
I made much better progress with figuring my big mirror once I stopped trying to use the ronchi test for figuring analysis and built a stepper motor-moved foucault test rig from an old scanner bed and a long-throw (50mm) 0.01mm dial gauge. then I was able to get repeatable test numbers to plug in to the figurexp software which is fantastic.
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