Hello again.
Thanks to everyone who contributed to answering an earlier question of mine.
I am very curious to know how to build machines from first principles. That is the root / basis of my questions.
One of my burning questions is:
Given that a reference flat must be originally produced from a set of three plates, and some machines have bed lengths longer than a surface plate can be made (unless you are a pharoah, and have armies of slaves to do the scraping for you), how can a bed that is longer than any reference plate you possess be scraped true ?
I ask this question because I believe the plate has to be shifted along, and once shifted along, I do not understand how any guaruntees can be given that it is in a coincident plane with where it was the first time.
Can someone please enlighten ?