I’m bringing up a Jrk G2 21v3, using open loop (no feedback) control via an analog input (10k potentiometer connected to the SCL/SDA/GND pins as shown in the user manual). I’ve tried using the scaling input setup wizard as well as manually adjusting the values, and both seem to make sense, based on the values of the analog input I’m seeing. As a note, I’m going for unidirectional control, which comes up in the warning on the wizard, which is fine.
However, the actual duty cycle being outputted doesn’t seem to be “fully scaled”. By that I mean the duty cycle is zero when the pot is zero (good), and it increases as the pot is turned (good), but it hits 100% duty at only about 30% of the max analog input.
The attached image shows this behavior. The graph is me turning the pot. You can see they correspond fairly well until I hit about 30% of the max input, at which point the rest of the input is disregarded (presumably being treated as above the input max).
ANy input on what might be going on would be appreciated!