Metal Scraping -Respond to viewers-

@AlmostMachining hace 21 días

If you can find 3 pieces of iron to make some flats with i recommend doing that first. 3 plate method except use maybe 700mm x 50mm if you have them. Then you compare a to b, b to c, c to a etc as you follow the method. Then you have a surface to use that you can trust. From there i would use that surface you made to check the machine base where the ram sits. Be careful and do this. Color your 3 plate surface. Put down on base way. If there is blue in the middle it is probably convex. Next clean surface just tested and do again. This time applying down pressure on the edge of one side. There shouldnt be blue on the other side. Do the same with the back. Make sure to understand the initial as is condition of the surface. Convex is harder to read than concave. Then pick a surface area to leave alone and slowly work your way. The ram has an adjustment to feed the tool down. You can use an indicator in that and feed down the vertical walls to check perpendicular at that pont. Sure not correct but good enough. I would tread lightly on the scraping. It shouldnt be out too much as hobby machines shouldnt be completely worn out. The riskyou face with a smaller than surface flat is you cannot tell the correct profile. Practice with 3 plates first. They will self check flatness to each other.

@rickpalechuk4411 hace 1 mes

Hi, Rusty sent me, just subbed Cheers

@Rustinox hace 1 mes

The nylon (or teflon?) block in the upper pivot in an original part. Over the years it swells up a bit and just needs some polishing with sand paper to give it a loose sliding fit. (and no play) Replacing it with bearing brons is not a good idea because there is no access to lugricate it.

@therealspixycat hace 1 mes

You can only scrape a surface flat when you have a reference surface that is bigger then the surface you are going to attack. The first method with small reference is I think wrong because that flat part is able to rotate or twits without you knowing.