Originally Posted by
drutort
Correct but,
it depends on your machine, yes a lot of machines have same H and D values and have special tables (right next to the tool height you would have a comp D value), but many Fanuc controls do not have a different H or D, thus require a D always different then the H, a lot of machines just have a offset table and you could use them for D or H, which means the machine can not tell difference between them its just data.
These values become important based on machine and post used, so for me its very important and all my tools that would use any compensation have different values, and normally I have offset the D's following after the tool change number so if you have 30 tools, the D's start from 31 and continue on, so tool 1 = H1 D31 for example.