What's new
Aloft Forums

Welcome to Aloft Forums. Register a free account today to become a member! Once signed in, you'll be able to participate on this site by adding your own topics and posts, as well as connect with other members through your own private inbox!

Problem setting up optical limit switches on diode laser using Lightburn (Solved)

Hawaii Sloper

Very Strong User
I'm a total noob at with a laser so please be kind! I'm having trouble getting my new laser to recognize the optical limit switches I installed. I'm using Lightburn as my grbl software.
polarity and signal are correct, plugged into the correct ports on the control board and switch LEDs are on (not sure that they should be). the limit switches, by design, go from low voltage to 5v when the beam is interrupted which apparently is different from a normal mechanical limit switch.
I have the switches enabled (Homing or $22 I believe), I've tried inverting the switch type from mechanical to optical in the settings ($5=1 for optical). I have them installed at the physical limits of the laser. I've also tried adjusting the homing pull off setting.

When I do a homing cycle it comes back to front left where I have origin set when I turn on the machine. I also have the X & Y axis set to front left for the homing settings. the problem is that when I tell it to home it goes to home (front left) but won't stop there and tries to keep going despite the optical switch beam being broken.
Anyone have any experience with these?

*Edit: I figured out what the problem was. Instructions provided from the Facebook group for the machine gave the wrong pinout for the board. Once I found the board pinout sheet I changed the voltage/signal wires and then inverted the switch type again and ALL IS RIGHT IN THE WORLD!
 
Last edited:
Back
Top