The printers are going into standby and eventually shutting off because they are not receiving the correct signal from UCCNC that the machine is running. This is a very simple fix outlined below.
![](http://cncfaq.us/wp-content/uploads/2019/03/22047-1024x555.png)
1.) Define pin outs in UCCNC --> CONFIGURATION --> I/O SETUP. On the left hand side you have "Current hi/low". Those two pins should read "16" and "1".
![](http://cncfaq.us/wp-content/uploads/2019/03/22048-1024x555.png)
2.) Define pin outs in UCCNC --> AXIS SETUP --> SPINDLE. Bottom Left you have "M3 relay pin". Change those values to "0" and "0" and uncheck the "spindle relay output enabled" if it is checked.