DIY Laser levelling using webcam and laser level

[devmonkey]

Question.!... Why do you need better than 0.06 for a router..? . . . . Answer.! . . . You don't.

With all the watts of brainpower you've invested in this, you could have heated the garage and built the bloody thing.! . . . Just get on with it and stop overthinking is my suggestion.

Yes I could have done, using maths I even worked out it would cost £84 in electricity ;-)

I may still use the epoxy if this doesn't work out but this thread is about developing a open source optical metrology system using very cheap components for the benefit of anyone who wants to measure anything accurately to few microns. I thought you'd be well up for that given your pet hate of people quoting accuracy figures they cannot measure.

Some projects do require better than 60um accuracy, or at least calibration of that level of error. For example I want to use the machine currently under construction or one of its offspring to position high power magnets into a halbach array for a coreless axial flux PMDC EV motor I'm developing, this needs 10um accuracy under quite significant magnetic load.