Nope, don't have caps, just connected up like was mentioned earlier on in the thread for the optical switches.A couple of points:
Do you have capacitors on the input and output of the 7812? I would suggest 470nF on the input and 100nF on the output
You need to be wary of power dissipation in the 7812, without a heatsink you'll only be able to dissipate approx 1.5W therefore at 24V in, the most current you can draw from the output is 1.5W/12V = 0.125 or 125mA
No that is what was puzzling me, the other 24v relays still work and the control itself still works and all are 24v from the same supply. It only seems to be the 24v going to the regulator that is affected which seems strange and also impossibleDefinitely fit a cap on the input to the regulator.
I assume when the 24V goes low it goes low everywhere in the controller?
Yes, right on the regulator pins.So would the cap be between the Gnd and Input of the reg?
Ok will give it a try if I can find some caps.Yes, right on the regulator pins.
Yes connected the right way and yes I already tested I was getting 12v.You absolutely certain that the 7812 is the right way round ? It is easy to confuse a top view or bottom view, I've done it myself.
Remove the brown wire from the relay board and check that you are getting 12 op on the 7812
Wouldn't think so or the control itself would start falling over and the other relays I have connected wouldn't work.Are you drawing more from the CNC supply than it is specced to provide?
Hood my good buddy. I feel your pain man, it's brain melting after a spell at it :/
Gaan listen to some of that mad "music" ye sent me. That'll kill or cure x
Yes, it is at the right, at first I thought it would change the polarity for the input pin but all it seems to do is take the relay coil out of circuit.I remember when playing with one of these relay boards for a project, it wasn't doing what I expected. I needed to move the jumper pins on the right-hand side to get it to behave.
But I am drugged up and can't remember what they changed.
The input pin of the relay board is sourcing as far as I can tell. Put it to Gnd and the relay operates, put it to VCC and nothing.If the output of the controller is a sink output then it will be trying to pull down the input pin of the relay board this could be creating a voltage devider which is what’s giving you the weird voltages.