SSR and Mech Relay for Mains bed Controlling, Need a doublecheck

[Mangy_Dog]

@wilriker said in SSR and Mech Relay for Mains bed Controlling, Need a doublecheck:

@mangy_dog which 5V pin are you using? The one next to PS_ON is an input. You need to use one from any of the extension headers.

You sure? Looking at the wireing diagram its just a pin to the 5V rail on the board. So when the boards powered it should be able to provide 5v, alternatively can be used to give 5V off a supply...

PS_ON sinking to ground makes sence tim, thats how i thought it should work...

[Mangy_Dog]

Well circuit tester out... ok that pin doesnt read any voltage.

[Mangy_Dog]

Ok, So that 5v is the external 5v input...

Am i right to assume if i put a connector on the EXT 5v EN jumper that 5v pin is then connected to the 5v rail on the duet?

So the normal use of using an external 5v PSU would be to disconnect the internal 5V header so external can be used...
But If I connect both headers am I right to assume that the 5V pin on the PS_ON header is just directly conencted to the 5V rail so just turns into a simple 5V pin for me to run the coil on?

Or is there some other circuitry going on that might mess up things?

[Mangy_Dog]

OK last thing last night I found the circuit diagram... And there's a zener between the 5v in pin and the 5v rail... That's why it didn't work....
I'm not prepared to void my warranty and solder jump that Zener....

[wilriker]

@mangy_dog Just take any of the three (or actually four) available 5V output pins on the expansion headers. There is one on the Panel Due header, one on the large expansion header and on on the CONN_SD header. And in the unlikely case of all these pins used by something else you could also take the 5V from the VFAN select jumper header.

P.S.: the latter might be protected by the 1A fuse but I hope your relay won't use that much current.

[Mangy_Dog]

With mech relay working, having to manually do m80 m81 to trigger it... but my keenovo heater is heating up nicely

Now all i need to do is tie M80 to trigger when the bed is set to active... and M81 when the bed is set to off and in thermal runway detection...
How

[Martin1454]

@mangy_dog said in SSR and Mech Relay for Mains bed Controlling, Need a doublecheck:

Now all i need to do is tie M80 to trigger when the bed is set to active... and M81 when the bed is set to off and in thermal runway detection...
How

+1 on that

[wilriker]

@mangy_dog said in SSR and Mech Relay for Mains bed Controlling, Need a doublecheck:

Now all i need to do is tie M80 to trigger when the bed is set to active... and M81 when the bed is set to off and in thermal runway detection...
How

The part for thermal runaway protection is already in place while doing a print AFAIK but not in idle (see this thread for a current discussion on this topic).

EDIT: I just checked the source code and the PSU is shut down on a heater fault while printing or while a print is paused.

I am not sure if there is a method to automatically connect M80|M81 to bed heating.

[Mangy_Dog]

is there a way to make custom .g scripts to happen in certain events?

[Martin1454]

@mangy_dog Not yet -