For people not familiar with this linear scale 'trick'
https://resources.renishaw.com/download.aspx?lang=en&data=49228&btn=1
My old company used Heidenhain LSNNNc scales because the 2 to 5 meter
travelss with top speeds of 1 meter per minute made homing tedious.
I remember the marks were every cm so homing (referencing) could be done
quickly anywhere in the work volume.
I forget how the data was stored on the scalem , and how it was read.
This was very handy on big machines,
because you were always less than 2cm from restoring reference.
tomp
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