Configure Laser Co2



  • Hi,

    I have configured a RepRapFirmware for Duet 2 Maestro 3.0 (2020-01-03b3), and I need the H2 to perform the diparo through the GND (-), but it is not activated. I pass the Test File and the config.

    Cut.g

    ; LightBurn 0.9.09
    ; Marlin device profile, absolute coords
    G21
    G90
    ; Cut @ 10 mm/sec, 100% power
    M106 S0
    G0 X50 Y40 F0
    M106 S255
    G1 Y60 F600
    G1 X76
    G1 Y40
    G1 X50
    M106 S0
    G0 X61 Y53 F0
    M106 S255
    G1 Y79 F600
    G1 X97
    G1 Y53
    G1 X61
    M106 S0
    G0 X76 Y69 F0
    M106 S255
    G1 Y93 F600
    G1 X108
    G1 Y69
    G1 X76
    M106 S0
    G0 X93 Y72 F0
    M106 S255
    G1 Y93 F600
    G1 X140
    G1 Y72
    G1 X93
    M106 S0
    G0 X92 Y81 F0
    M106 S255
    G1 Y105 F600
    G1 X125
    G1 Y81
    G1 X92
    M106 S0
    G0 X89 Y88 F0
    M106 S255
    G1 X122 F600
    G1 Y55
    G1 X89
    G1 Y88
    M106 S0
    G0 X103 Y94 F0
    M106 S255
    G1 Y112 F600
    G1 X134
    G1 Y94
    G1 X103
    M106 S0
    G0 X116 Y101 F0
    M106 S255
    G1 Y120 F600
    G1 X151
    G1 Y101
    G1 X116
    M106 S0
    G0 X118 Y101 F0
    M106 S255
    G1 X151 F600
    G1 Y67
    G1 X118
    G1 Y101
    M106 S0
    G0 X115 Y109 F0
    M106 S255
    G1 X147 F600
    G1 Y82
    G1 X115
    G1 Y109
    M106 S0
    G90
    ; return to user-defined finish pos
    G0 X0 Y0 F0

    CONFIG.G

    ; Configuration file for Duet Maestro (firmware version 2.03)
    ; executed by the firmware on start-up
    ;
    ; generated by RepRapFirmware Configuration Tool v2.1.8 on Wed Jan 29 2020 20:11:58 GMT+0100 (hora estándar de Europa central)

    ; General preferences
    G90 ; send absolute coordinates...
    M83 ; ...but relative extruder moves
    M550 P"MK1 Laser" ; set printer name

    ; Network
    M552 P0.0.0.0 S1 ; enable network and acquire dynamic address via DHCP
    M586 P0 S1 ; enable HTTP
    M586 P1 S0 ; disable FTP
    M586 P2 S1 ; enable Telnet

    M307 H2 A-1 C-1 D-1 ; disable heater 2 so we can use its pin to drive a Laser
    M452 P2 S1 R125 F5000 ; laser mode 5000 laser

    ; Drives
    M569 P0 S1 ; physical drive 0 goes forwards
    M569 P1 S1 ; physical drive 1 goes forwards
    M584 X0 Y1 ; set drive mapping
    M350 X16 Y16 I1 ; configure microstepping with interpolation
    M92 X160.00 Y160.00 ; set steps per mm
    M566 X1200.00 Y1200.00 ; set maximum instantaneous speed changes (mm/min)
    M203 X9000.00 Y6000.00 ; set maximum speeds (mm/min)
    M201 X1000.00 Y1000.00 ; set accelerations (mm/s^2)
    M906 X900 Y1400 I30 ; set motor currents (mA) and motor idle factor in per cent
    M84 S30 ; Set idle timeout

    ; Axis Limits
    M208 X0 Y0 S1 ; set axis minima
    M208 X900 Y600 S0 ; set axis maxima

    ; Endstops
    M574 X1 Y1 S0 ; set active low and disabled endstops

    ; Z-Probe
    M558 P0 H5 F120 T6000 ; disable Z probe but set dive height, probe speed and travel speed
    M557 X15:215 Y15:195 S20 ; define mesh grid

    ; Heaters
    M140 H-1 ; disable heated bed

    ; Fans
    M106 P0 S0 I0 F200 H-1 x118 ; set fan 0 value, PWM signal inversion and frequency. Thermostatic control is turned off

    ; Tools
    M563 P0 D0 H1 F0 ; define tool 0
    G10 P0 X0 Y0 ; set tool 0 axis offsets
    G10 P0 R0 S0 ; set initial tool 0 active and standby temperatures to 0C

    ; Custom settings are not defined

    M501

    Thank you



  • I had to do Downgrade at 2.04, and before starting to do the job, I have to send by console M3 S255, to turn on the Heater, and that is how it works. Otherwise or just sending M3, shooting does not work. I don't know if something will be wrong.

    Thank you


  • administrators

    Turning the laser on/off using M106 fan commands is a very old approach, intended for firmware that can't handle anything better. I suggest you configure Lightburn to generate G1 commands with S parameters to control the laser instead.



  • thanks for your reply

    Ye have modified LightBurn and the code comes out with the M3, as I had indicated. Send example.

    ; LightBurn 0.9.09
    ; Marlin device profile, absolute coords
    G21
    G90
    ; Scan @ 300 mm/sec, 20% power
    M05
    G0 X41.63 Y88.14 F0
    G91
    M03 S51
    G1 X-0.97 F18000
    M03 S0
    G1 X-4.26
    M03 S51
    G1 X-0.87
    M03 S0
    G1 X-4.11
    M03 S51
    G1 X-1.03
    M03 S0
    G1 X-0.33 Y-0.1
    M03 S51
    G1 X1.69
    M03 S0
    G1 X3.46
    M03 S51
    G1 X1.49
    M03 S0
    G1 X0.88
    M03 S51
    G1 X0.76
    M03 S0
    G1 X2
    M03 S51
    G1 X1.68
    M03 S0
    G1 X1.17
    M03 S51
    G1 X0.89
    M03 S0
    G1 X1.11
    M03 S51
    G1 X0.87
    M03 S0

    My question now is ... to fire the laser, I have the PWM of the fan controlling the (IN) Imput 0-5 V.

    What output do I have to connect to TH of the laser power supply ??? GND H2 ??? or positive + H2 ???

    Thank you.

    P.D .: Sending photo connection of the power supply

    alt text

    alt text)

    https://ibb.co/XDZ35BC
    https://ibb.co/N298VYH


  • administrators

    Marlin doesn't understand G1 commands with S1 parameter, so it is not an appropriate profile to use.



  • @dc42 Very funny and sorry that I have to bother again, but something I do not understand.

    You are not sending the G1 command with parameter S1. Or I did not understand something.

    I send a piece of a Gcodec, to tell me where the error is, by using the M3 command with the S1 parameter that Gcodec, or do I have to modify something in the config.g ????



  • I keep looking, but I don't see the error it refers to.

    Any help please?

    Thank you


  • administrators

    If LightBurn doesn't have a device profile for RepRapFirmware, try a profile for Smoothieware. That should generate G1 commands with S parameters to set the laser power.



  • I tried Ligtbrurn with the Smoothieware profile and generated the Gcodec that I put next. Is this seriously correct? Can something better be done to get more performance when recording with the Duet with other software?

    ; LightBurn 0.9.09
    ; Smoothieware device profile, absolute coords
    G00 G17 G40 G21 G54
    G90
    M3
    ; Scan @ 300 mm/sec, 20% power
    M106
    G0X115.81Y96.3
    G91
    G1X-4.62F18000S51
    G1X-0.05Y-0.1S0
    G1X4.72S51
    G1X0.06Y-0.1S0
    G1X-4.84S51
    G1X-0.06Y-0.1S0
    G1X4.96S51
    G1X0.06Y-0.1S0
    G1X-5.08S51
    G1X-0.05Y-0.1S0
    G1X5.18S51
    G1X0.06Y-0.1S0
    G1X-5.3S51
    G1X-0.06Y-0.1S0
    G1X5.42S51
    G1X0.06Y-0.1S0
    G1X-5.54S51
    G1X-0.06Y-0.1S0
    G1X5.66S51
    G1X0.05Y-0.1S0
    G1X-5.76S51
    G1X-0.06Y-0.1S0
    G1X5.88S51

    Thank you


  • administrators

    That's much closer to ideal. The laser is being controlled by S parameters on the G1 commands. Some of the commands at the start are odd (e.g. M106 with no parameters), but harmless.

    What issue do you have with performance?



  • Hello,

    We are a group in Spain of more than 20 people, we have mounted a CO2 laser and mine, is the first that is working. We have installed Duet2D Maestro and we are looking for a software that generates a Gcodec completely compatible with Duet and the Laser.

    We have acquired some already LightBurn, but we are not having good results, we do not know if the culprit is the adjustment of the Duet or it is of the Software, since with a Laser K40 and plate of very little quality, it was obtaining better results with K40 Wisperer.

    Maybe we have to make some adjustments or change the software.

    https://photos.app.goo.gl/gz8XiZ7GXHnrQg7h6

    https://photos.app.goo.gl/KrJzu9yycSjMEtMf6

    Could you make some recommendations?

    Thank you very much.

    P.S.: Sorry, but I don't know English and I use Google translator.



  • @juanmena
    You might want to read this thread: https://forum.duet3d.com/topic/12150/laser-gcode-s-sticky-after-g0-question, there is some discussion of how to configure LightBurn with Duet/RRF Firmware. The bad news is that there is no built in 'compatibility' for the Duet in LightBurn.

    Currently I use LaserWeb; (but I control a Grbl CNC, not Duet, so cannot give a config).
    https://github.com/LaserWeb/LaserWeb4

    LaserWeb is very good at preparing raster and dither images from bitmaps and jpeg's etc. And at cutting and filling svg (vector) images. But it has no image editing tools beyond resizing and rotating them. So I often use Pinta or InkScape to prepare the source material first.

    LaserWeb can run as a standalone application on your laptop/pc to generate Gcode and optionally control/stream to the firmware via USB or telnet if desired. Look for the windows 'electron' build.But I use it it on a Raspberry PI in web client/server mode to give myself a webUI.

    Since you can configure all headers etc with laserweb it is much easier than LightBurn to configure for a Duet. The inbuilt RRF profile is a good start.



  • @EASYTARGET Thanks for answering.

    I've been installing and testing and that's why I've been slow to answer.

    LaserWeb, generates a Gcode without the G1 in front of each line and the Duet, does not respond to these movements. For the rest, it seems that it could be worth it, but without that, it does not move in conditions. Step example of what it generates ...

    G1 X2.15 Y2.15 S0.0000
    X21.95 S0.3129
    Y2.45 S0.0000
    X21.80 S0.6872
    X2.30 S0.7000
    X2.15 S0.4841
    Y2.75 S0.0000

    Those lines are not valid for Duet.

    Let's see if someone can help me, because I think I'm going to have to leave Duet for the Laser.



  • Good morning,

    First of all I want to thank all the help I'm getting, but it's not working for me, I think the installation is correct, and I apologize for what could bother me with so many questions, but I would not like to leave the project.

    I will explain my approach and the duas.

    The first thing is to check the installation I have is the correct one, or I would have to change to option 2 or some other cable. The PWM always goes through a converter board

    My installation (Duet - Laser power supply)

    FAN0 - FAN0- <> Signal Ground GND
    FAN0 - V_FAN_A <> Imput Control Signal (0-5V)
    E1 HEATER - E1- <> Switch Laser Control (Active Low)

    I am asking if option 2 would be more correct, connect E1 HEATER - E1- <> Imput Control Signal (0-5V)?? and activate "Switch Laser Control (Active low) with another PIN that acts directly on/off with M3/M5?

    I pass photos:

    alt text
    alt text
    alt text

    E1 may be doing PWM by the Switch Laser Control (Active Low) PIN
    from the laser power source?

    Is this Gcode format correct?

    ; LightBurn 0.9.09
    ; Smoothieware device profile, absolute coords
    G00 G17 G40 G21 G54
    G90
    M3
    ; Scan @ 300 mm/sec, 20% power
    M106
    G0X115.81Y96.3
    G91
    G1X-4.62F18000S51
    G1X-0.05Y-0.1S0
    G1X4.72S51
    G1X0.06Y-0.1S0
    .........
    ..........

    I've been looking at this post, but I think it was talking about K40 and yet I think this laser power supply, could it be connected differently or am I on the wrong track?

    Thank you very much again


  • administrators

    @juanmena said in Configure Laser Co2:

    @EASYTARGET Thanks for answering.

    I've been installing and testing and that's why I've been slow to answer.

    LaserWeb, generates a Gcode without the G1 in front of each line and the Duet, does not respond to these movements. For the rest, it seems that it could be worth it, but without that, it does not move in conditions. Step example of what it generates ...

    G1 X2.15 Y2.15 S0.0000
    X21.95 S0.3129
    Y2.45 S0.0000
    X21.80 S0.6872
    X2.30 S0.7000
    X2.15 S0.4841
    Y2.75 S0.0000

    Those lines are not valid for Duet.

    Let's see if someone can help me, because I think I'm going to have to leave Duet for the Laser.

    Currently, RRF recognises that style of command in CNC mode but not in Laser mode or FFF mode. I will change it in RRF 3.01RC2 to recognise those commands in Laser mode too.


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