Sculpfun S9 Air Assist

This thing is to add Air Assist to Sculpfun S9 laser engraver cutter. Included is a jig to bend the 4mm aluminum tubing and to cut the end off at the correct angle and a jig to drill the hole through the orange acrylic shield so you don't need to take it off for this upgrade. I have upgraded the firmware to GRBL v1.1 to use end stop inputs and "cooling" / Air Assist output. The Air Assist output is connected to a relay that actuates an air solenoid valve. You must edit the config.h file and some machine settings correctly, so be careful if you go the automation route. I use Lightburn and it has an Air Assist on/off slider for each layer.

Items I purchased:

4mm Tubing on Hobbylinc
https://www.hobbylinc.com/htm/k+s/k+s9803.htm

3mm ID x 5mm OD Silicone Tubing on Amazon
https://www.amazon.com/dp/B08NHNBFRT/ref=cm_sw_em_r_mt_dp_QR19RY4XG60FA2KGBAAQ?_encoding=UTF8&psc=1

Solenoid on Amazon
https://www.amazon.com/dp/B08F9PLM4D/ref=cm_sw_em_r_mt_dp_BK4Q3BRNFD9PR77VGQ45?_encoding=UTF8&psc=1

Relay on Amazon for active high or active low settings
https://www.amazon.com/dp/B00LW15A4W/ref=cm_sw_em_r_mt_dp_5AAWFRBBR07KK49VYJJE?_encoding=UTF8&psc=1

I had to added a capacitor to stop EMP from the magnetic field breakdown when relay is turned off. The EMP would stop/pause the laser.

Let me know if your interested in other details of my project.