Huanyang VFD, RS-485 verses 0-10 VDC control

[Aiph5u (Aiph5u (not affiliated with Onefinity))]

Hey David,

@DoubleD

I […] have a 2.2kW spindle with a Vevor brand VFD that unfortunately doesn’t have a RS-485 port, but does have analog inputs (0-5V, 0-10V and 4-20mA). If I understand correctly this should work as well, but I’m unable to find information on how to configure it on the OF side.

@Aiph5u

the Onefinity Controller offers PWM output that you get at the corresponding pin and that is adjusted with the PWM settings on TOOL page. It is usually needed by PWM spindles.

If your VFD has only analog 0-10 V voltage input but no PWM input, you need a PWM to voltage converter module. Take care to choose one that works with 3.3 V PWM input.

@DoubleD

Should I use “PWM SPINDLE” in the tool settings?

yes.

@DoubleD

Is there a way to test this so I can measure the output voltage?

If you have a multimeter, of course!

You configure the VFD to match your spindle and the usual settings, then the settings that make hat the analog voltage range corresponds to the right spindle speed range, then you connect the PWM-to-voltage converter to the I/O interface on the Onefinity Controller and the other end to the analog voltage input on the VFD, then on the Onefinity Controller’s TOOL page make your adjustments under “PWM spindle” (set spindle speed range (see spindle datasheet, usually 6,000–24,000 on most cheap chinese water-cooled spindles, 8,000–24,000 on air-cooled), ‘tool-enable’ enabled, and ‘pwm-freq’ according to the PWM-to-voltage converter you bought (see its datasheet), ‘rapid-auto-off’ and ‘dynamic power’ both to disabled, and finally you type “S8000 M3” into the command entry field of the MDI Tab of the CONTROL page which should then make spindle start to run at 8,000 rpm. Stop with “M5”.

Welcome to the forum!

PS: You can use the search function of this forum. E.g. I remember there was an appearance of the Vevor VFD here.