ok, what I'm not understanding is if my only option is to check the height with a height gage I will not get the lowest point unless I subtract the gap between the part and table.So do I subtract?
Frank,
Thank you for your responses. If any two point measurement is below 5.000 is non-conforming then if I use a height gage on that same part I would have to subtract any gap on the bottom to obtain the same result as I did with the caliper.. right?
Don't you inspect flatness by it's self
and...
What if I use a caliper to measure height and get a reading of 4.990 which is .010 low
Then I use a height gage and get a reading of 5.020 which is higher because of the oof
which is correct?
I have a 5.000 +.060 -.000 high forging with a oof of.060
my problem is that the top surface has some waviness and there are low areas on both faces not across from each other
so I placed part on a surface plate measured the top face with a height gage found the lowest spot, then subtracted the...
drawoh,
we have tried a 3 jaw chuck on a table as a turntable, but when unchuck and rotate the part and re chuck it we get a different roundness. how do you know if the part is on center?
I have a large forging (36" ID). the tol. is 36.000 +/-.060
when measured with a vernier the id max diameter is .060 smaller than what our CMM max diamater. caused from the part being .090 O.O.R.
when inspected on CMM and graph the results the actual shape of the part is shaped like a three leaf...
