Solved Summary of HuanYang VFD Control by Duet3D 6HC

[dainon]

I've been reading many posts here and via other sources regarding VFD and Duet3D control. To summarize what I've read, most everyone uses an inexpensive PWM to 0-10V board to control the "Inexpensive" HuanYang VFD for speed control. Someone mentioned using the 5V PWM VFD support on the mainboard, but that's still PWM. The HuanYang uses 0-5 or 0-10V speed control not PWM. There's a discussion here about what more can be "built-in" to the Duet3D for CNC spindle improvements, but no clear direction or answer for my question today.

What I'm curious of is if there's a way to configure, for example, the OUT_1 pins (out1, V_FUSED) for variable volts output to send the 0-10V control that the HuanYang VFD uses? I've connected a volt meter to see if this works, but I'm not certain of the config file parameters as I always get 0V. I've tried the following, but have also read I possibly need to disable a heater.

; Tools
G10 P0 x0 Y0 Z0
G10 P0 R0 S0
M563 H0 S"Spindle"
M950 S0 C"out1" R24000 Q100 T0

I hope it goes without saying, this is confusing. I already have a friend who is short and snippy about what he thinks of my knowledge on the subject, so please be constructive here.

Information About My System
Custom Built CNC - Based on IndyMill
Duet3D Mainboard 6HC with Raspberry PI
Huanyang VFD HY01D511B (HY Series)

[jay_s_uk]

@dainon as far as I'm aware, a 0-10v pwm to analogue converter is the only way that'll work.
Out1 etc are all just MOSFET driven pwm controllers with no variable voltage control
Note: this is how I control my VFD

[dc42]

@dainon the main issue here is that high power VFDs are prone to generating ground noise, so the 0-10V feed to them should be isolated from the Duet. Many VFDs (including the one that you are using) provide a 10V output so that you can connect a potentiometer across that 10V supply and feed it to the speed input. The PWM-to-voltage converter replaces that potentiometer.

[dainon]

@dc42 Thanks for that information. I've had similar issues with a hydroponic Ph sensor connected to the pumping system circuit. When the pump kicked off, the sensor got out of whack and need some time to settle. I assume what you are saying is similar that? I'm a hobbyist and not an expert in electrical circuits.

[dainon]

Thank you all. I bought a PWM to Analog converter and will be wiring that up today. I'll mark this topic solved.