# Laser on but does not mark wood, cardboard or plastic **URL:** \ **Category:** GRBL\ **Created:** [September 13, 2020, 10:56am UTC](https://forum.lightburnsoftware.com/t/laser-on-but-does-not-mark-wood-cardboard-or-plastic/22011 "2020-09-13T10:56:06Z")\ **Posts on this page:** 9\ **Page:** 1
**Author:** ![Daveypoos](https://forum.lightburnsoftware.com/letter_avatar_proxy/v4/letter/d/df705f/32.png) [@Daveypoos](https://forum.lightburnsoftware.com/u/Daveypoos)\ **Post date:** [September 13, 2020, 10:56am UTC](https://forum.lightburnsoftware.com/t/laser-on-but-does-not-mark-wood-cardboard-or-plastic/22011/1 "2020-09-13T10:56:06Z")
Vigotec VG-L3A frame ( [http://vigotec.cn/](http://vigotec.cn/) ) With 450nm / 550mw diode lase.( [https://www.ebay.co.uk/itm/12V-2500mw-5500mw-Laser-Head-Laser-Module-Engraving-Module-Part-For-CNC-Engraver/402351061096?ssPageName=STRK%3AMEBIDX%3AIT&var=672349456099&\_trksid=p2057872.m2749.l2649](https://www.ebay.co.uk/itm/12V-2500mw-5500mw-Laser-Head-Laser-Module-Engraving-Module-Part-For-CNC-Engraver/402351061096?ssPageName=STRK%3AMEBIDX%3AIT&var=672349456099&_trksid=p2057872.m2749.l2649)) Controller board markings CNC-01 V2.0 170708 I have viewed the videos & read the introduction document I have tried the settings I can find sp $32=1 $30 & S-value max = 255 But I cannot even mark cardboard, plastic or wood. I am sure I am missing something very basic, point me at some documentation? Many thanks Dave ---
**Author:** ![Daveypoos](https://forum.lightburnsoftware.com/letter_avatar_proxy/v4/letter/d/df705f/32.png) [@Daveypoos](https://forum.lightburnsoftware.com/u/Daveypoos)\ **Post date:** [September 21, 2020, 12:18pm UTC](https://forum.lightburnsoftware.com/t/laser-on-but-does-not-mark-wood-cardboard-or-plastic/22011/2 "2020-09-21T12:18:42Z")
I have also enabled the fire button in the Move window. Regardless of the setting the intensity of the laser does not change and nothing gets marked. I have tried 1000 & 2555 settings for $30 and made sure spindle speed had the same value. I have tried $32 at 0 & 1 The only thing I cannot find confirmation for is the use of the rotary control on top of the laser, it is like on on off switch when on the laser intensity stays the same wherever it is turned ![Laser](https://forum.lightburnsoftware.com/uploads/default/original/3X/a/b/ab9271f06e6596d6dc45d09ae0b7922fb9350681.jpeg) ---
**Author:** ![Daveypoos](https://forum.lightburnsoftware.com/letter_avatar_proxy/v4/letter/d/df705f/32.png) [@Daveypoos](https://forum.lightburnsoftware.com/u/Daveypoos)\ **Post date:** [September 21, 2020, 12:36pm UTC](https://forum.lightburnsoftware.com/t/laser-on-but-does-not-mark-wood-cardboard-or-plastic/22011/3 "2020-09-21T12:36:16Z")
Answer Well silly me. I thought as the frame laser and leads were from the same source they would be wired correctly, wrong. So I made a text file listing the pin outs for the laser and controller, then the way the lead was wired and found the flaw, Carefully extracted the wires that needed to be swapped and Bob’s your uncle ---
**Author:** ![HRFONE](https://forum.lightburnsoftware.com/letter_avatar_proxy/v4/letter/h/d2c977/32.png) [@HRFONE](https://forum.lightburnsoftware.com/u/HRFONE)\ **Post date:** [October 12, 2020, 4:48pm UTC](https://forum.lightburnsoftware.com/t/laser-on-but-does-not-mark-wood-cardboard-or-plastic/22011/4 "2020-10-12T16:48:30Z")
Hi i also have the same frame, maybe even the same board. Could you explain how you solved the issue? My laser does not emit any laser light. EDIT: Yup exact same board ---
**Author:** ![CozyCo](https://forum.lightburnsoftware.com/letter_avatar_proxy/v4/letter/c/c2a13f/32.png) [@CozyCo](https://forum.lightburnsoftware.com/u/CozyCo)\ **Post date:** [October 13, 2020, 3:36am UTC](https://forum.lightburnsoftware.com/t/laser-on-but-does-not-mark-wood-cardboard-or-plastic/22011/5 "2020-10-13T03:36:53Z")
> [@Daveypoos](#): > > Bob’s your uncle How’d you know Bob was my uncle? ---
**Author:** ![Daveypoos](https://forum.lightburnsoftware.com/letter_avatar_proxy/v4/letter/d/df705f/32.png) [@Daveypoos](https://forum.lightburnsoftware.com/u/Daveypoos)\ **Post date:** [October 13, 2020, 11:12am UTC](https://forum.lightburnsoftware.com/t/laser-on-but-does-not-mark-wood-cardboard-or-plastic/22011/6 "2020-10-13T11:12:18Z")
I cannot accept responsibility if you do this wrong. If you are not sure about the wiring seek professional help. Looking at my laser I saw the socket marked - 12v + TTL. So I thought the left pin 1 - 12v DC the middle pin was + 12v DC and the right pin was for the TTL signal. On the back of the control board I saw the same markings. When I looked at the lead I expected the red wire would connect to + 12v DC on the laser & controller, black to both the - 12v DC and blue to the TTL. This was not so. it was a bit fiddly to swap the wires over but when I did the laser worked first time. The thing to be careful about is the wires connect to the pins after, you may get no power. This may be because if the 3 silver bits in the picture are not fully seated they may not reach the pins on the PCB ![plug](https://forum.lightburnsoftware.com/uploads/default/original/3X/d/e/de0dc832c6962bfbbbbc6ec9a8b085107e5c1f6e.jpeg) ![wiring](https://forum.lightburnsoftware.com/uploads/default/original/3X/5/6/56a4dcc0645605bb99ca38b51ce0b841cca35ddd.jpeg) ---
**Author:** ![HRFONE](https://forum.lightburnsoftware.com/letter_avatar_proxy/v4/letter/h/d2c977/32.png) [@HRFONE](https://forum.lightburnsoftware.com/u/HRFONE)\ **Post date:** [October 13, 2020, 5:49pm UTC](https://forum.lightburnsoftware.com/t/laser-on-but-does-not-mark-wood-cardboard-or-plastic/22011/7 "2020-10-13T17:49:24Z")
Thank you, i switched the red and yellow around and bam it works! Can now engrave! Why on earth did they create a board with red and yellow swapped? ---
**Author:** ![Daveypoos](https://forum.lightburnsoftware.com/letter_avatar_proxy/v4/letter/d/df705f/32.png) [@Daveypoos](https://forum.lightburnsoftware.com/u/Daveypoos)\ **Post date:** [October 15, 2020, 8:49am UTC](https://forum.lightburnsoftware.com/t/laser-on-but-does-not-mark-wood-cardboard-or-plastic/22011/8 "2020-10-15T08:49:50Z")
I think it is actually the cable. During my time of trying to get this to work I purchased an entirely different model of controller board, same problem, same solution. I told the people who sold me the laser & frame and so hopefully they will do something before shipping new orders. Next project is to install drag chains to tidy up the cables. ---
**Author:** ![system](https://forum.lightburnsoftware.com/user_avatar/forum.lightburnsoftware.com/system/32/64335_2.png) [@system](https://forum.lightburnsoftware.com/u/system)\ **Post date:** [November 14, 2020, 8:49am UTC](https://forum.lightburnsoftware.com/t/laser-on-but-does-not-mark-wood-cardboard-or-plastic/22011/9 "2020-11-14T08:49:51Z")
Closed on November 14, 2020, 8:49am UTC This topic was automatically closed 30 days after the last reply. New replies are no longer allowed.