Scraping in a Myford MG12-M cylindical grinder / part 4

[MuellerNick]

I think I have shown that in part1. With a straight edge, measure the wear in the bed. Then decide wether that is too much scraping for you. 0.1 mm isn't too terrible.

[stillbashingmetal]

How can you tell if the machine bed can be brought back to limits just by scraping?

How do you determine if it needs regrinding first, then scraping?

Thanks.