To add to Franks statement about blade control, I have seen several roller guide wheels that were severely tapered from running hard against the spinning blade, to try to control blade track in the cut.
A mill REQUIRES as perfect a setting as possible, to get maximum effect cutting logs.
Down here, we have wood MUCH harder-dense than anyone in the USA/Canada area. Having cut some of this tropical stuff that was acquired in Miami Fl., from people planting "old mother country" species, I can tell you, we learned mighty quickly how setting those guides were to be able to cut stuff that just chattered the blade.
If y'all think shagbark Hickory is tough to saw straight, you haven't even seen hard wood.
Yeah, I get overzealous with comments, but, the OP needs to look very closely as to why he can't get that final 1" board. Actually, the standard for rough sawn hardwood is 1-1/8 to allow for planer cleanup. We saw to 1 1/16 and never had a bad comment from what customers we had, in the USA. Down here, 1" is what is used to build with, and, most builders used 7" disc sanders to clean up the chainsaw cut boards. Now, anybody worth a damn has a planer of some sort, even if hand held. YEP, Primitive Pete is alive and well in CR.