Re: Adding inertia to an axis

In the recent thread about X-Axis won't do as it's told - there was a
suggestion from Hoyt to try adding inertia to the axis. As it turned
out that wasn't the problem in Richard's case - but it may be the
problem for one of my machine axes. But I'm curious as to how much
extra inertia to try adding... I'd like to start in the right ballpark.

I have a NEMA42 motor so I will probably try turning a solid steel disc
around 3" dia and say 1" long as a starting point, recognizing that the
disc's OD is most significant in moment of inertia calculations. Would
appreciate any suggestions other than my wild guess as a starting point.

Cheers, Peter