It varies by machine-some are more accurate. Not really important, all that really matters is relative improvement, increasing the number on whatever form of resistance is used.
i use the whole stack on some of this shit....just more reps!
Almost ALL machines being made today are not using a 1:1 ratio.The reason for this is they're trying to maximize the versatility of the weight stack.Almost every manufacture will provide the percent breakdown of each one of their machines
that's news to me... do you have an example?