Machine: K40 with Digital Display and M2 Nano Board
Board: C3D LaserBoard
Firmware: I have a new board and I’m using what it came with.
Problem: Brand new K40 with digital display and M2 Nano board. I did a quick test of the stock setup and the machine powers up, auto homes to the top left, and I am able to test fire the laser.
I then installed the C3D board as described on the website by doing the following:
- Hooked up X and Y connections
- Plugged in 4 pin, which has G, L, 5V, and 24V
- Plugged in endstop connector
- Connected DC into board
- Connected USB into board
- Plugged in SD card the board came with
- Plugged AC power supply for board into outlet.
Had K40, water pump, and C3D power supply plugged into a 3-way extension cord.
LED’s lit up as described on the website for normal operation.
Hooked the USB to my Mac with Lightburn. I was able to jog the X and Y and send the laser to home. Prepared a test job by drawing simple squares. 1 in each corner and 1 in the center. When I tried to run the job I got the message saying there was an issue with the USB (I’m sorry I don’t remember the exact wording). I tried to unplug the USB and reconnect it and tried to run the job a few more times with the same result.
GFI outlet tripped. I reset the outlet and have moved the water pump and K40 power to an outlet and the LaserBoard to a different outlet.
When I power on the laser it starts firing immediately. Only way to stop this is to power off the machine or turn the power down to 0. I was able to jog the X and Y in Lightburn and send it back to home.
What’s interesting also is once I hook my computer up and have the board powered on I can hear a hissing from the laser tube. It continues even after I turn the machine off. It only stops if I unplug the DC cord from the board.
LEDs still light up as normal operation. No visible damage to board on front or back.
What am I missing here?
Please help me! I am at a loss and am confused what is happening.
I hooked up the M2 Nano board and it powers up normally. Homes to top left and I am able to test fire laser, but it does NOT begin firing on its own.
Red and black going into the 4 pin on the c3d board are for the red dot that came installed on the laser.
When I first swapped out the Nano board for the C3D I noticed a hissing sound at power on - at the time I thought this may have been the laser power supply. I have since discovered that this was the sound of the laser tube firing. It seems that from the beginning of installing the C3D board, the laser fires once the machine is powered on.
Laser fires at power on as long as the 4 pin LV connector is plugged into the LPS and the C3D. This happens regardless if the C3D is powered on or not.
Here is a photo of some tests I did to check for voltage at the laser fire pin on the C3D board as well as a continuity test checking for ground.
Unit was powered on for all 4 tests.
Laser began firing automatically for tests M1 and M3
Here is the config file info for the laser module (all stock the way the SC card shipped):
Laser Module Configuration
Whether to activate the laser module at all. All configuration is ignored if false.
this pin will be PWMed to control the laser. Only P2.0 - P2.5, P1.18, P1.20, P1.21, P1.23, P1.24, P1.26, P3.25, P3.26
can be used since laser requires hardware PWM
this is the maximum duty cycle that will be applied to the laser
This is a value just below the minimum duty cycle that keeps the laser active without actually burning.
This is the default laser power that will be used for cuts if a power has not been specified. The value is a scale between the maximum and minimum power levels specified above
this sets the pwm frequency as the period in microseconds