XSY-AT1 VFD on/off and speed wiring enquiry

[Jeroen Zeemeijer]

Hi,

I recently bought a XSY-AT1 VFD (1ph to 3ph) to run my 2.2kw air spindle as part of a new machine build. I'd like it to start stop, and if possible also set the speed from Mach3 gcode. Its not clear to me from the wiring diagrams of the VFD which control wiring connections to connect to the BOB. Any thoughts or links welcome.

Hi Marbles,

In order to control both speed and direction you preferably need to have a 0-10V or 0-5V output on your BOB along with one or two relay outputs for direction control. XSY-AT1 VFD also supports 4-20 mA input signal but this is less common for DIY projects. However for longer wire distance a better option since voltage drop is less of an issue.

The analogue voltage signal connects to the COM (-) and VL1 (+) terminal from the top of the VFD. Also you need to adjust setting P10 (working frequency source) to setting 2 to make this work. This will control spindle speed from min rpm to max rpm set in your VFD.
For direction control a relay output from BOB is used and connected in series between terminal X5 and COM on VFD. This is making the spindle run backwards when active. Depending on your needs this could be enough to control your spindle. Another option is to use terminal X5 (run in reverse) or X3 (swap direction of spindle rotation). So in my opinion just 1 relay should be enough in this case.

Main external control settings:

P10 frequency source setting (2) // external command
P11 start/stop setting (2) // external command like switch or relay (also activates direction control)
P65 start-up state VFD (this adjust the common state of your VFD after start-up) eg. Forward/ Reverse / other.
P50 can be set to 8. This makes terminal X1 your (reset VFD) input.

Good luck,

Jeroen