Ok after playing around a bit here is the update. I build a laser mount for a 2.5W blue laser. It’s removable, it binds between the 611’s locking ring and the aluminum bracket. This was carved from aluminum on the SO3.
Following this, I burned a 30 inch ruler, which I tediously drew in CAD and then pulled into estlcam where I used the automatic toolpath and set everything to engrave. I then wrote a small post processor to change the Z depths from moving to M3 and M5 commands to turn on and off the laser. I know you can do some things like this in inkscape with plugins but I have had no success pulling in the .dxf file properly and to scale, so this was a fast solution.
Here is my ruler:
Without changing any settings on the machine, and carefully starting at the edge of the board I think it came out well!
I checked it with a standard measuring tape and from the first line (Not the edge) to the last line / edge it came out exactly 30 inches as I had anticipated it should, at least that is how I drew it in CAD.
If anyone is interested this is the “Laser” gcode. Just make sure you start all the way on the bottom left of your board. The ruler is 1 inch thick. Also this is for 2 to 2.5 watt laser, you can do a find and replace on the F in the gcode and change it to faster or slower depending on how fast your laser burns. The TOTAL time taken to burn this 30 inch rules was 11 minutes, 16 seconds!
Ruleruntitled2.zip (19.6 KB)
Lessons learned so far:
- Connect the laser to Pin 11 for the TTL PWM. This is the middle pin on the arduino header MOSI.
- Not a lesson but please practice proper laser safety!
- The machine is accurate!
- For this laser I changed the feed rate to about 600, it’s a fairly bold line at this speed.
- You MUST use Universal gcode sender or another software. Carbide Motion adds a DELAY for the M3 commands which will mess up your drawing. (You can test it in the air, it will not hurt anything if you have no laser)
Can we get an option in Carbide Motion for LASER where there will be no spin up / spin down delays? That would be AWESOME guys.
Anyways thought I would share my experience so far, still awaiting the feet, and homing switches and the mounts for the wire chain.