Before rebuilding my machine I like to plan the entire rebuild, and simulate different aproaches in my head, to make sure I do not start at the tail end of the project. Here it helps to write down my thought process to keep track.
On the surface grinders the feed (x) axis does the most traveling, for standard flat grinding job, the feed axis will travel the length of the material x 2 for each in-feed (y) advance, and the down feed (z) axis will travel one depth of cut for complete feed , in-feed cycle. Assuming maximum material to be removed on a surface grinder is less then 1mm, and the in-feed is 0,5 and down feed is 0,1. And stroke length is 150mm and table length is 300mm. Then the total distance traveled for full table work piece to remove 1mm material is:
feed (x) ( 150mm/ 0,5 ) x (300mm+300mm) = 180 000mm = 180m
in-feed( y) 10 x ( 150mm + 150mm) = 3000mm = 3m
down feed (z) = 10x 0,1 = 1mm
With this in mind you will have to spin the feed hand wheel 190 times, and if a feed cycle takes 10seconds it will take half an hour to complete the job ( hand wheel is 300mm diameter) most parts are not that big, but still a long time to stand there.
Perhaps the reason for full automatic grinders, and why I consider automating the machine. Anyways, so I expect to see most wear on the feed axis, then in-feed, and then down-feed.
Below the measurement, the maximum wear on the feed ways is 0.582 rear and 0.809 front.
The down-feed guide ways on the column, are worn on the bottom side to about 0,03mm. Due to the cantilever effect of the knee, I expect the dovetail guides on the back to show similar wear in the center portion.
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