Originally Posted by InspirationTool "Lead screw mapping" is pretty common in astronomy, where they call it "periodic error correction" to map out varaitions in the worm drive.
Actually, this is something that amatuers should look into to compensate for cheaper screws.
-Jeff |
any bright ideas on how to do the reference measurement DIY / cheaply ?
I think the pro's use laser interferometers ? It probably needs to be dual wavelenght or heterodyne or something to distinguish between the direction of motions.
also, once you have your fancy laser interferometer, how do you mount it so that it is absolutely collinear with the axis of motion ?