No, it means that if the analogue reference from the VFD 9s 5V then 0% PWM will be 0V and 100% PWM will be 5V.
If, however, the analogur reference from the VFD is 12V then 100% PWM will give you 12V.
What it is saying is that the valid range of analogue reference voltages from the VFD to which it can be connected is 5V to 18V.
The SPINX1 is a digital potentiometer replacement, that is,
it takes a fixed voltage (5 to 18V) and generates a
variable voltage that depends on the PWM duty cycle
so if you supplied 12V to the SPINX1 and the PWM input duty
cycle was 50% you would get a 6V output (and 3V for a 25% duty cycle etc)
Most VFDs have a speed control input that's designed to work with a
potentiometer, that is, they have a 10V voltage source, a speed control input,
and a common pin. These can be connected to the SPINX1 and allow
LinuxCNC to control the spindle speed by varying the PWM output duty cycles
So, if i have understood correctly, i need a 10 V power supply connected to the SPINX1. I also need to use a PWM output from Linuxcnc connected to the SPINX1.
How would i do this? Do i have to connect the SPINX1 to the 7i85s?
If this is correct, i can do this and connect to the second connector of the 5i25 a 7i84 daughter card to have the 6 digital inputs for the limit switches, cant i?
