Did you know ?
If your CNC mill or router controls the spindle with a VFD, you can interface that VFD with Smoothieboard using Modbus ( or the chinese derivative of it the VFD uses ), to control the spindle’s rotation via Gcode.
Just takes a breakout board and two wires to the VFD :
That helps, the best documentation I’ve seen on interfacing to the Huanyang VFD. Are there Eagle files for the boards?
@Steve_Anken I believe they are on bouni’s github. You can also use the rs485 breakout from sparkfun I think.
Be aware that I’ve just implmented the Huanyang “Protocol” (crippled chines sh**) and not yet had the chance to test on a real Modbus device. But It should be fairly easy to get that up and running if it adheres to the specs and has a real documentation 
How may I order a Modbus PCB? Can you post to New Zealand?
@Jestah_Carnie Contact stephane@robotseed.com
Hello @Arthur_Wolf . I would like to use a board or breakout (I don’t know the right term) that could bring me the chance to control my vfd ( https://www.automationtechnologiesinc.com/products-page/cnc-spindle/kl-vfd22/ ) over modbus, using smoothieboad. I’m not specialized over electronics. You said sparkfun breakout, and, looking that page, I could found three products that could match the requirement. Is it posible to use one of them ?. If not, could you give more breakout examples ?. https://www.sparkfun.com/products/10124 https://www.sparkfun.com/products/9822 , https://www.sparkfun.com/products/12965 . Thanks for your help.
@Antonio_Hernandez It’s the first one
Great @Arthur_Wolf . Thanks for your help. If somebody has the same trouble with this (wiring), this image could help to know the breakout’s spec. https://www.taroumaru.jp/img/arduino/4.png
