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Anyone got details on how this be possible?
already got the PWM signal to Voltage Converter Digital-Analog PLC
looking to conect it to my VFD and my Duet to control spindle speeds.
Thanks for looking
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Which PWM to voltage converter did you get?
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Your first problem is this:
PWM signal input level range:4.5V to 10V peak level jumper inserted at 5V . This class level signal mainly for conventional industrial control card ( such as MACH3 board ), 5V for CPU interface.
If you have a DueX in your system then you can get a 5V signal from one of the servo pins. Otherwise, only 3.3V signals are available. You will need to identify the optocoupler input series resistor on that PWM converter and reduce its value (e.g. by soldering another SMD resistor on top of it) to make the input 3.3V compatible.
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Could he use a 5V fan output if hes got one spare?
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@bearer said in Duet 2 controlling a cnc spindle / VFD via pwm:
Could he use a 5V fan output if hes got one spare?
Yes, or a spare heater output.
