No problem with slight delay.
Yes, the feedback is an integrated linear 10 turn 10k potentiometer. Because the actuator extension is deliberately by design restricted to 38% of maximum, the feedback potentiometer range is 0 to 3.8kohms.
The actuator is a Gimson Robotics GLA80000.
The control potentiometer is also 10k linear.
0 volt reference for both pots is wired to solo pin 1 (gnd)
control slider is wired to solo pin 3 (S1)
feedback slider is wired to solo pin 10 (1B)
The feedback potentiometer supply is 4.096 volts derived from the solo +5v using a TI precision shunt regulator.
The control potentiometer supply is 2.048 volts derived from the solo +5v using a TI precision shunt regulator.
In this way the feedback range/resolution is maximised at 38% of 4.096v = 1.556v (theoretical)
With no USB connected to the solo, the resistance from either potentiometer 0v connection to the solo battery negative connection is less than 1 ohm (either polarity) when corrected for lead resistance.
The actual measured voltage range is:
0v control = 0v feedback actuator open
2v control = 1.483v feedback actuator closed (it looks like the solo input pin is loading the circuit slightly)
There is no resistor in series with the pots as regulators drop voltage, see above.
I do not understand "resistor in series with the pwm wire as described in the manual" - do you mean from 5v to pot? - Not needed, see above.
With USB connected the actuator extension goes 0mm to 201mm as required by design.
Without USB connected it goes from 9mm to 201mm.
QPPS = 420 for both speed and position
Position P = 5000
I = no real effect, can be set to practically anything
D = no real effect, ditto
Note: Today I checked another solo from previous work in another (but similar) circuit, same usb lead, same software, same pc. It does not shift calibration when connected/disconnected.
Weird or what?