small mill for machining steel. Max spend £500 including computer

[Andrew Wilding]

I fancied a change of tack so I have started checking and improving the geometry of the axes.

First check is the perpendicularity of the knee. This is the set up for the first method




This was the second method which I was planning on checking the first method with, however the results of this method were not very consistent so I abandoned it.



The results show an error of about 0.001" out of plane using the first method which can be improved with a bit of judicious scraping.



I has previously used the gound side surface of a parallel as my reference. This was not a very good reference so the next task is to scrape a reference surface. Oh joy - blue fingers over the weekend then! Once the horizontal surfaces are complete I will then check the other two surfaces of the dovetail are parallel.