docs_blackbox 4x_iot and laser
If you would like to fit both a spindle and a laser to your machine:
- Grbl only has one PWM output
- Easiest method to share this signal between multiple tools, it so add a Single Pole, Double Throw switch to direct the PWM signal between the two devices
- This can also act as a Laser Disarm switch, preventing the laser from firing (safety)
Wiring is as follows:
- PWM from BlackBox, to COMMON pin of switch
- PWM out from one side of the switch, to PWM IN on the Laser Module
- PWM (ON/OFF, as the IoT doesn't support PWM) to the control input on the IoT
- You can substitute the IoT Relay with Router for other PWM toolheads - the concept remains the same, the switch directs which tool sees the PWM signal from the BlackBox
Software / Firmware:
- Remember to disable/enable [Laser Mode] in Grbl Settings as applicable
- Learn more on https://github.com/gnea/grbl/wiki/Grbl-v1.1-Laser-Mode
