Aurora GRT8-M1 Timer Relay Functions, Settings, and Manual
Technical details of the GRT8-M1 SPDT timer relay used in Aurora series laser machines, including part number, knob settings, wiring, and reference links.
Provided as-is for Thunder Laser USA customers. Always run a test cut on scrap first — settings vary by material and machine. Please do not redistribute.
Preface: This article covers some of the technical details of the GRT8-M1 relay used in the Aurora series Lasers
GRT8-M1 located in the top of the Aurora, next to the Main Breaker
Part Number Explained
We use the GRT8-M1 with is a SPDT Timer off relay with 120v Control Voltage so the full part number would be GRT8-M1/W240
Red Knob Settings
Knob 1: 1s
Knob 2: 50pct
Knob 3: E Mode
Wiring from Aurora Schematics
Aurora Series Wiring Diagram v8.4
Tracing Wires Back to Sources or Devices
Notes About Relay Function
