UC300ETH -UCBB - LASER TTL

[marben]

Hi,

I'm trying to connect a laser module to my ucbb board, but when I run the M3 command the laser turns on full power.

On my previous BOB i connected TTL+ to output 17. TTL- to ground and 12V+ through a relay and 12V - to ground and that worked fin. M3 command started the fan on the module and M10Q*** powered the laser.

What to I have to do differently on the UCBB board and how do I configure UCCNC?

The laser module has input 12V+ 12V- TTL+ and TTL-

[cncdrive]

I suspect that your laser output pin Active low setting is configured in reverse (incorrectly) if the laser turns on on M3 command.
Try to reverse the Active low setting of the laser output pin.

[marben]

Hi again,

I tired that and it doesn't seem to make any difference. I'm suspecting that I've made some wrong connections.
I can see the LED's brightness on the UCBB change when I run M10Q*** commands, but no changes in the laser's power.

How do I connect TTL + and - to the UCBB board?