HURCO KMB-1 Control Update

I'm still addressing some old school electronics that needed updating in the VFD, so turned my attention back to the override potentiometers.
When the spindle runs and I read the pot via the 3.3volt Analogue pin 7i92.0.7i71.0.2.input_03, there is a notable hunting in the spindle speed. Not much, but it just doesn't sound steady.
This is down I think to the ADC hopping between bits which is also normal.
I looked at the original Hurco control use of the pots and how the analogue values were read, and note that the conversion to digital was done in a 12 bit ADC. so the increment between bits is tiny in comparison.
In the 7i73 manual. it states:
"OPERATION
ANALOG INPUTS
Inputs 0 through 7 can read analog signal values however only inputs 0 through 3 are supported for analog input by available interface modes. Analog inputs have a range of 0 to 3.3V. Normal resolution is 8 bits. All bits are readable as digital inputs. Note: analog inputs are only accessible in some software modes."

Does this mean I could configure an analogue input to use a increased resolution of 12 bits?
If so How would I do that?
Thanks
 

The 7I73 does not currently support any higher resolution  A-D modes,
(I think the issue was exceeded the total serial data available) but
one simple thing to try is to low-pass filter the 8 bit data from the 7I73
in hal before using it to control the spindle speed.

If the flicker is greater than 1 LSB it may also be that you are picking
up some noise in the potentiometer wiper line. You could reduce this
by adding a small (say 1 uF) capacitor from the potentiometer wiper
terminal to 7I73 GND.

Thanks Andy,
Since writing that I did manage to inadvertently introduce an axis offset via the tool table, so have become super cautious.