Laser permanently on

This Section is for users to discuss hardware

Laser permanently on

Postby dequity11 » Wed Jan 29, 2025 9:21 am

Hello,

I have installed a low power laser for marking wood pattern outlines to my cnc router. The machine is driven by an AXBB-E controller and has been trouble free for a couple of years now.
The laser is a 1.6W LED 24VDC PWM=5VDC Three wire - Pos, Neg, PWM
The basic problem is that with the PWM lead tied to pin 17 port 1, the laser is always on from machine startup.
I have tried every configurble setting for PWM, spindle control. Active Hi / Lo, you name it. I think I've tried it with no success and whilst most others struggle to fire their lasers, I am struggling to switch it off.
Please help, it would be much appreciated.

Rgds,

Mirko
dequity11
 
Posts: 12
Joined: Sat Jul 30, 2022 10:23 pm

Re: Laser permanently on

Postby dequity11 » Thu Jan 30, 2025 10:12 am

Some help please!
dequity11
 
Posts: 12
Joined: Sat Jul 30, 2022 10:23 pm

Re: Laser permanently on

Postby cncdrive » Fri Jan 31, 2025 11:50 am

Well, if the control is always on for the laser pin set to active low and also for active high then something is wrong with your laser controller.
My suggestion is to measure the output signal with a multimeter or even better to use an oscilloscope or logic analyser.
cncdrive
Site Admin
 
Posts: 5002
Joined: Tue Aug 12, 2014 11:17 pm

Re: Laser permanently on

Postby dequity11 » Fri Jan 31, 2025 7:18 pm

Thanks for your response. My electronics knowledge is fairly basic but I have done that and pin 17 measure high regardless of configuration- 4.98Vdc. Even though I would prefer to resolve pin 17, can I try other output pins on Port 1 without blowing anything up.
dequity11
 
Posts: 12
Joined: Sat Jul 30, 2022 10:23 pm

Re: Laser permanently on

Postby cncdrive » Fri Jan 31, 2025 10:51 pm

You can configure the laser to any of the output pins.

I would also check if anything else is configured to pin 17.
cncdrive
Site Admin
 
Posts: 5002
Joined: Tue Aug 12, 2014 11:17 pm


Return to Hardware

Who is online

Users browsing this forum: No registered users and 5 guests

cron