How to "tune" multiple softpots

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hi there,

i'm making multi-ribbon controller many softpots , i'd them behave homogeneously: is, pressing @ same height in different softpots should give me same result analogread. of them differ 10 (of 1023), easy correct in code, few differ  more: 50 in mid range, 15 or 20 when closer extremes. why this? seems doesn't behave in way easy correct reliably in code.

by way, i'm using 800k resistors pull-downs. actual values oscillate between 795 , 820, not sure if affecting, doesn't seem when comparing actual values of pulldowns results analogread.

could softpots not homogeneous @ all?

thanks in advance :)

quote
i'm using 800k resistors pull-downs

that high, cause problems when rapidly switching between channels.

quote
could softpots not homogeneous @ all?

yes right.


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