What is a decent spindle relay ?

[John11668]

Following on from my recent query about unwanted spindle pulsing, I will take advice from there and get a separate spindle relay.
I would like one which is robust but gives me the opportunity to vary speed so will need to provide a 0-10v signal to the VFD.

I did buy a CP0-10V https://www.cnc4you.co.uk/Breakout-b...Pump?search=cp but it did not live long.
I don't know whether it failed , or whether I broke it , but if I ask them then it is bound to be the latter. Not sure if I would fancy the same again.

What other options would folks suggest ?

Maybe as part of the discussion I will raise an issue which occurred yesterday when VFD came up with 0PF2 (lost phase fault) whenever I stopped the spindle . It was stuck at 99.9hz and my manual pot seemed to be reluctant to turn it down. I reckon the pot had gone on the blink and by working it back and forth a bit I got it to control again.
Maybe there is a better solution than a cheap wire wound pot????

[JAZZCNC]

Following on from my recent query about unwanted spindle pulsing, I will take advice from there and get a separate spindle relay.
I would like one which is robust but gives me the opportunity to vary speed so will need to provide a 0-10v signal to the VFD.

Hi John, Maybe you misunderstood when I said I use a better quality relay.? It's only for the Stop/Start and not the 0-10V speed reference voltage.
You don't need the speed reference going through the relay as it's only telling the VFD how fast to spin, it's the Start/stop signal that pulses it on off.

Finder or Omron are both decent relays.

[John11668]

I am only using the spindle relay function on the board to switch a 2 wire signal (24v) to tell the VFD to start the motor so very light duty and effectively the VFD is acting as a 3 ph., 1.5 Kw relay here .
Along with its options for spindle delay , soft start , et al

This KK01 relay started to play up on its 5v USB supply , so I had to add a 5 v PSU.
Previous BOB also from CNC4you, also fell over . so I cant use its 0-10V facility .

Is there a simple (I need simple ) spindle control relay capable of switching the signal voltage to start the spindle motor , then provide a 0-10V variable voltage to speed up and slow down the spindle as required .

If it comes down to it I can stand up and hit the start button and twiddle the pot to increase / lower the revs, but as I normally have my lazy backside on my bar stool, it would be nice to be able to control it from the keyboard

[John11668]

Hi John, Maybe you misunderstood when I said I use a better quality relay.? It's only for the Stop/Start and not the 0-10V speed reference voltage.
You don't need the speed reference going through the relay as it's only telling the VFD how fast to spin, it's the Start/stop signal that pulses it on off.

Finder or Omron are both decent relays.

Presuming the BoB relay is up to the task of starting the VFD , then where do I take my 0-10v signal from ?
Does UCCNC facilitate that?

[johngoodrich]

0-10v will still come from the breakout board as usual

[Doddy]

John11668 - some BoBs, though not the KK01 that you have, have an onboard PWM - to 0-10V converter, and within UCCNC you'd specify the pin that this function is attached to, and then UCCNC would generate a pulse-train that the BoB would then convert to 0-10V for spindle speed. Unfortunately, as mentioned the KK01 doesn't support this function. Ironically, the more typical $5 chinese BoBs tend to.

[John11668]

Right so what is the difference between this
https://www.cnc4you.co.uk/Breakout-B...th-Charge-Pump

And this
https://www.ebay.co.uk/itm/CNC-5-Axi....c100005.m1851

Apart from having to wait a couple of weeks that is

[Doddy]

Of interest - your old CP0-10V - you said that didn't last long. What happened to it?, how did it fail? And do you still have it? There's limited interest in a dead board but it's an expensive board to replace - if you wanted me to have a quick look to see if there's anything repairable on the board I could take a look for you if you cover postage.

[John11668]

Of interest - your old CP0-10V - you said that didn't last long. What happened to it?, how did it fail? And do you still have it? There's limited interest in a dead board but it's an expensive board to replace - if you wanted me to have a quick look to see if there's anything repairable on the board I could take a look for you if you cover postage.

Would be quite happy to send for your inspection doddy. PM your contact details . Basically one day it stopped responding to a power supply .Led no longer came on

[Clive S]

Right so what is the difference between this
https://www.cnc4you.co.uk/Breakout-B...th-Charge-Pump

And this
https://www.ebay.co.uk/itm/CNC-5-Axi....c100005.m1851

Apart from having to wait a couple of weeks that is

About £40. With it you do need a 12-24V power supply + a 5V one as well although you can power the 5 volts from a usb but personally I don't do that.

I have used plenty of them without trouble