Relay to fire plasma cutter.

bradmcco

bradmcco
Hi,

I have setup a 5V Arduino relay from one of the TTL outputs on the masso and configured the pin to coolant flood for testing, I have wired the VCC and Ground to the External 5V Power supply.

When I switch the coolant flood between high and low the relay is not triggering.

Could someone please recommend a relay they have used?

Thanks,

Bradley
 

breezy

Arie
Staff member
Bradley,

Have you connected the MASSO ground to the Arduino relay? You need a return circuit for the TTL output to work.

Regards,

Arie.
 

bradmcco

bradmcco
Quote from Breezy on January 24, 2020, 5:21 am

Bradley,

Have you connected the MASSO ground to the Arduino relay? You need a return circuit for the TTL output to work.

Regards,

Arie.



Hi Breezy,

Thanks for the reply.

Ok I didn't know that, So if I wire the + VE out of the 5V PSU to the VCC of the relay and the ground to a ground port on the masso controller and the TTL output to the input pin of the relay block.

I was worried about connecting the grounds together between the 5V PSU and the Masso as I read sometimes it is not recommended as some things may reference the ground.

Now I need to move the output to the CW signal from the masso to the relay to signal my spindle to turn on / off. Is there a easier way todo this? My Spindle is a FIXED RPM spindle. Are the spindle outputs also TTL'S and 5v?
 

breezy

Arie
Staff member
Bradley,

When using different PS that share connections between components, you need to create a common reference point and that is done by connecting ALL -ves together.

What you need to watch out for is that you do not create a "loop", that is where different components are connected together through a "third" component. The easy way to solve this is to create a "bus bar" that all -ves (components & PS) connect to.

Also "ground" refers to AC earth connection and the outputs of PS should not connected to that.

If you have the relay working with the coolant output just move the wire to pin 2 of the spindle connector.

Regards,

Arie.
 

bradmcco

bradmcco
Quote from Breezy on January 24, 2020, 1:18 pm

Bradley,

When using different PS that share connections between components, you need to create a common reference point and that is done by connecting ALL -ves together.

What you need to watch out for is that you do not create a "loop", that is where different components are connected together through a "third" component. The easy way to solve this is to create a "bus bar" that all -ves (components & PS) connect to.

Also "ground" refers to AC earth connection and the outputs of PS should not connected to that.

If you have the relay working with the coolant output just move the wire to pin 2 of the spindle connector.

Regards,

Arie.

Hi Breezy, thanks for clarifying that!







Thanks
 
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