A complete tutorial to control a VFD & Spindle

Hi all,

If this forum would not exist, I would never be able to create my CNC and fix all my concern with.
My biggest problem was about controling a VFD/inverter with linux CNC.

I create a complete tutorial to help other member as I found great support here:

The complete tutorial

Hello andy,

It was not this circuit. The problem was that the huanyang VFD does "answer" to Linux CNC signal.
Then I spent a long times on youtube & forums to find informations about converting a 0-5v pwm signal to a 0-10v huanyang inverter.

One guy explained me that the huanyang electronic does have a very different impedance thant the rest of the circuit and this impedance affect the PWM signal. So he explained me to put an AOP between the BOB and the optical circuit with a simple follower with a gain of one. The effect is to isolate (from impedance side of view) both circuits from to BOB to the huanyang electronic. So I did that (it is very easy) and it works great !