I recently re-built my 4.1 with turtle clamps, sanded the spools which were binding and a few other things. I upgraded to 1.21 and re-calibrated and I’m seeing a max fitness of 0.71 whereas previously I remember fitness numbers as high as 1.50.
What is considered a “good enough” fitness value these days? I saw there’s a threshold of 0.45 for cancelling calibration, but not sure what the high-end of accuracy looks like.
Zach wrote:
I recently re-built my 4.1 with turtle clamps, sanded the spools which were
binding and a few other things. I upgraded to 1.21 and re-calibrated and I’m
seeing a max fitness of 0.71 whereas previously I remember fitness numbers as
high as 1.50.What is considered a “good enough” fitness value these days? I saw there’s a
threshold of 0.45 for cancelling calibration, but not sure what the high-end
of accuracy looks like.
“good enough” is “does it do the work you are trying to do” for some people
being 10mm off is not a problem (theater scenary) for others 0.5mm is
unacceptable.
the fitness is an estimate of how accurate the machint thinks it has the anchor
locations, it’s “1/estimated error across all points”
However, it’s not a direct measure of accuracy, if you do a run over a small
error, the accuracy of the estimate is not going to be as good as if you run it
over a larger area, even if the fitness number over the small area is higher.
We’ve had a lot of people do a run over a small area in the center and get a
high fitness score, but if they do the same thing over a larger area, the score
goes down. That doesn’t mean that the machine is less accurate, just that the
initial run over the small area didn’t properly show the limitations.
0.71 is a pretty decent result, try it and see if it works for your type of
work.
David Lang
Appreciate you taking the time, this is super helpful!
I’ll go ahead and give it a shot and see how it goes. 