This circuit will monitor a laser cutter's filter control and air input, and ensure both are operating properly when the laser is on. If not, warn the user.
- Connect the fume extractor control line to the female DB9 of the laser monitor.
- If using V1.0.0 hardware, must invert the pinout with an adapter cable.
- 5-1, 9-6, 4-2, 8-7, 3-3, 7-8, 2-4, 6-9, 1-5
- Connect the male DB9 on the laser monitor to the laser cutter's fume control output.
- Cut the air line to the laser cutter, and install the flex host T-joint.
- Connect 3mm ID tube to the air transducer on the PCB, and the other side to the T-joint.
- Connect 12v power supply.
- Connect laser monitor via USB to computer, open serial terminal with baud rate 115200.
- Send the following config commands;
- Set the start delay with d [ms], i.e. "d 10000" for a 10-second startup
- Make sure to set the same startup time in the Epilog laser
- Set the air pressure threshold with a [val], i.e. "a 7000000"
- Tip: use "c" to see the current air monitor reading to determine a threshold appropriate for your system.
- Set the filter full warning with w [0/1], i..e "w 1" if you want to be warned when the filter is reporting full
- This does not disable the fault response, just the low pressure filter warning.
- You should be all set! Make sure to do tests on the system.
- Set the start delay with d [ms], i.e. "d 10000" for a 10-second startup
- Assembled PCB (See Electronics Folder)
- 6x 3mm Plywood Laser Cut Case Parts (See Mechanical Folder)
- 12v >3A Barrel Jack Power Supply
- Andon Light Tower (12v) With Buzzer
- Suggested that a blinking red light is used
- Common anode or common cathode systems permitted, set control mode switch accordingly.
- DB9 Extension Cable (Connect Laser to Laser Monitor)
- Flex Hose T-Joint
- 3mm ID Flex Hose (OD sized to fit current system, 8mm normal)
- SparkFun 14 Segment Dispaly COM-16916 (Optional) + QWIIC to 2.54mm DuPont cable
- Threaded Rubber Magnet (1/4-20 thread)
- Hardware
- 4x M2.5 25mm Standoffs
- 4x M2.5 12mm Standoffs
- 4x M2.5 6mm Spacers
- 8x M2.5 Screw
- 8x M2.5 Nut
- 4x M5 Bolt
- 4x M5 Nut