Auto Spindle On/Off

• Buy this board :
  • CNC4PC - C15   Dual Relay Board 
• Can control 2 outputs
• Easy setup and cheap!
• Connecting   small l1 and l2 causes the spindle to turn off

Sherline ESC

G-Code Setup

G04

• Dwell (this is  the time the machine will take a pause)
• Works in   milliseconds
• G04 P2500   =   Pause for   2.5   seconds

M03

• Turns on spindle

Example:
M03 (spindle turns on)
G04   P2500 (gives 2.5 sec for spindle to spool up)