No-Name YL620-A VFD

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

Hey rickyacruz,

thank you for sharing your settings and your information on the YL620-A VFD!

@rickyacruz

this is my actual unit, please see the setting pasted on my vfd body, I switch from Gcode to VFD dial depends on what I cut. Mostly I do auto on regular products and run manual on prototype products.

Yes, I have already noticed that some people like to turn the “Speed” button while the spindle is running and the CNC machine is at work. Normally, if the execution of the “Run” and the “Frequency” (=“Speed”) Commands is left over to the CNC controller via the RS-485 / ModBus serial connection, turning the Potentiometer has no more effect. I understand when some people switch back and forth between the two settings they call “Manual” and “Auto” then.

But it’s laborious to switch between these two if you have to brachiate through one-line menus on a Seven-segment display using four nasty Membrane keyboard buttons .

In that regard the VFD Omron MX2 aka Hitachi WJ200 is particularly advantageous here, since it offers the “Forced Terminal Block” function. If you assign this function to one of the Intelligent Input Terminals, you can connect a switch which enables you to always quickly toggle that you want to operate the “Run” and “Speed” from the Operator Front Panel, even though the VFD is set to receive the commands from CNC controller . Unfortunately simple VFDs such as the Huanyang or the YL620-A do not offer such a functionality. With these, in order to switch from “Manual” (Operator Front Panel) to “Auto” (CNC Controller), you have to laboriously change the parameter settings (that you glued onto your VFD as shown above).

@rickyacruz

Thing to note is that the stopping setting for the spindle rotation is “Coasting Stop” and it takes about 10seconds for the spindle to come to a complete stop so be careful to touch the bit.

I see that you asserted “Decelerating Stop” to “Manual” Mode and “Coasting Stop” to “Auto” Mode. I assume that when using “Manual” you have the enclosure open and want the safety of a spindle stopping immediately, while on ”Auto” mode it is not important for you that the spindle keeps spinning after powering it off. This presumably also spares the bearings.

Do you have a Brake Resistor connected to the VFD? As far as I know, most VFDs emit an Error if you select “Decelerating Stop” and no Brake Resistor is connected. Usually I would always advise to set it to “Coasting Stop” for this reason, unless I know that someone purchased the braking resistor with the VFD and has conected it.

Also in order not to kill your spindle on its first use, it is very important to set the Mandatory Spindle Parameters according to your spindle’s manual, datasheet, or motor plate.

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@rickyacruz

I put some safety visual and audible devices to prevent accident when using my CNC

If you are always near the machine when it is working, like most hobbyists, you will be satisfied with visible and audible alarms. If you want more security, you can set up a safety circuit that causes the VFD to stop the spindle in the event of errors. I recently showed wiring diagrams for this. Sensors for cooling water temperature and flow can be connected to a safety relay as well as an external Emergency Stop Switch.

@rickyacruz

and I also run my Vacuum and water pump together when the spindle spins (I used the VFD A0 terminal to run my SSR) not the OF as the VFD has a higher Amp Capacity and the AO Terminal runs with the spindle rotation.

This is perfect. It is the job of the VFD to ensure that the spindle water cooling is on when the spindle is running and VFDs are made for this.