LASERS…I could use some info

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This topic contains 65 replies, has 22 voices, and was last updated by  Daniel Dunn 7 months, 2 weeks ago.

Viewing 30 posts - 1 through 30 (of 66 total)
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  • #76457

    Ryan
    Keymaster

    The amount of laser questions is bugging me. I keep trying to add a laser info page and at least one link other than Jtech (I like the good option and the cheap option). The problem is Aliexpress “data sheets” tell us zero information that we need to know. I literally can’t figure out which cheapo to buy. I keep trying get frustrated and give up. I just want to buy one and give a link. I know how to hook them up for all three main types and how to do the firmware but I need to write a page making this very clear.

    Jtech has the 12v capable board and that is perfect.

    I am looking for links to lasers that you own and are using on the 5v ttl pins. 1W-7W, I don’t see a need for the giant expensive ones. I will write up a page after I order one and confirm it works.

    I will add a 12V cheapo one if you can confirm the raster function works well. Meaning power levels are controllable not just pulsed.

    #76480

    Guffy
    Participant

    A year ago i had read an article of russian guy who made 2W laser cutter. In the article he said that he investigated aliexpress and found good shop and the seller pretty polite, answered a lot of questions.

    Link to the shop at beginning of the article

    https://mysku.ru/blog/aliexpress/40000.html

     

    1 user thanked author for this post.
    #76486

    Guffy
    Participant

    Also later he wrote that he replaced the head with 5.5w laser

    https://mysku.ru/blog/china-stores/48299.html

    Which can, as he told, cut 4mm plywood with 3 passes (with air jet to cut point)

    1 user thanked author for this post.
    #76488

    dkj4linux
    Participant

    I have several of the Banggood Eleksmaker 3.5 watt lasers and they’ve all worked fine for what I’ve needed. I usually get them on sale for $70 or so… they’re on right now for $65. I’ve always used them with the Mega/RAMPS1.4 stack… with the D9 fan pin remapped to pin 44.

    https://www.banggood.com/450nm-3500mW-3_5W-Blue-Laser-Module-With-TTL-Modulation-for-DIY-Laser-Cutter-Engraver-p-1103261.html?gmcCountry=US&createTmp=1&utm_source=googleshopping&utm_medium=cpc_union&utm_content=2zou&utm_campaign=pla-all2-us-pc&gclid=CjwKCAiAodTfBRBEEiwAa1hauh3E4tNZCb2lg5RCP2VBr-aSYAqCLmsOzAWYpClbxIck7MZuAFuTiMBoCMhIQAvD_BwE&cur_warehouse=CN

    Add Pawpawpaw85’s shroud/air-assist (https://www.thingiverse.com/thing:2832127) and it makes a pretty nice setup IMHO…

    20181121_175623

    — David

     

    2 users thanked author for this post.
    #76490

    Ryan
    Keymaster

    Guffy that laser is discontinued.

    David, I think that is a winner. I knew I had seen one around. I know that brand should be around for a while, the price is right, and if you have used a few of them I consider it verified.

    That was easier than I expected. Thanks both of you. I thought this might take a while, I love being wrong (sometimes).

     

    #76527

    Kevin
    Participant

    I have the same 3.5 watt [supposedly] as David and I am using a RAMBO 1.4 board.  I don’t have a ton of experience with it yet, but it seems to work fine.

    1 user thanked author for this post.
    #76542

    Steve
    Participant

    I have a couple of drivers from Opt Lasers. Very well made and super user support.

    #76551

    Ryan
    Keymaster

    The quality stuff is easy to use as there docs are complete, and correct. I was just looking for an import option. I hope to right up two of the ways to use a laser (5v and 12v), but I have to do it for so many boards that is the time consuming part. The quality stuff will be straight forward to adapt and we rarely see questions about those as is. The import stuff is the time consuming majority.

    The one instruction set I have says pin 44 for Ramps…but everyone keeps trying pin 44 on other boards.

    #76644

    Sean
    Participant

    Just ordered from Endurance Lasers, picked up the 10w+ honestly have no clue what I’m doing so I should be able to ask LOTS of questions and hopefully provide for good info!

    The Endurance 10 Watt+ (10000 mW) laser “Invincible plus” module (add-on) with 445 nm wavelength for any 3D printer / CNC machine

    Hopefully next week!

    #77101

    James Harding
    Participant

    I’m looking at purchasing a laser, this thread is just about the right time. I wanted to pull the trigger today. I’ll try and wait for the guide to be released.

    #77123

    Ryan
    Keymaster

    I ordered the one above, should be here soon I hope.

    #77723

    Giovanna Laucella
    Participant

    perfect timing for me too. I just ordered the MPCNC comes Monday. I wanted to research how hard it would be to do a laser and here we are. I know nothing of lasers can you guys recommend a good place to start.

    #77735

    Jason Dentler
    Participant

    I have the 2.8W from jTech. Once I got the air assist figured out, it works pretty good.

    I ordered a cheap-o 15W from Aliexpress,  expecting to get something between 5 and 10W in reality. Instead, my order was placed on hold until I uploaded pictures of my credit card, drivers license and bank statement. Noooop. I got a 40W CO2 from Amazon instead. Merry Christmas to me!

    1 user thanked author for this post.
    #80659

    S Sauntson
    Participant

    Season Greetings Gentlemen

     

    I recently purchased one of these

    https://www.ebay.com/itm/332869197074

    After following Some Old Guy Coding on Youtube, to amend the firmware and finding out the TTL wires had been marked in reverse. It is fully controllerable and works very well.

    5.5w-Laser-Test

    Took 11 days to arrive from China

     

    very pleased with it

     

    regards

    #80791

    Ryan
    Keymaster

    Well I got the laser I ordered above. Tried to start testing it. The lens does not fit properly. It almost threads in but can be pulled in and out by hand. That just will not work to hold focus when the laser is moving for hours. I can’t see an easy way to fix it other than maybe some pipe tape but I can NOT recommend the laser I ordered.

    #80792

    dkj4linux
    Participant

    Well I got the laser I ordered above. Tried to start testing it. The lens does not fit properly. It almost threads in but can be pulled in and out by hand. That just will not work to hold focus when the laser is moving for hours. I can’t see an easy way to fix it other than maybe some pipe tape but I can NOT recommend the laser I ordered.

    Ryan,

    I’m not at all clear as to which laser you ordered. I’ve had nothing but good luck with all the Eleksmaker lasers I’ve ordered from Banggood… a couple each of their 2.7w and 3.5w lasers. I’m sorry that yours is messed up 🙁

    — David

    #80794

    S Sauntson
    Participant

    Well I got the laser I ordered above. Tried to start testing it. The lens does not fit properly. It almost threads in but can be pulled in and out by hand. That just will not work to hold focus when the laser is moving for hours. I can’t see an easy way to fix it other than maybe some pipe tape but I can NOT recommend the laser I ordered.

    Im sure alittle PTFE tape would help tighten your lens

     

    regards

    #80796

    Ryan
    Keymaster

    That is the bad part, if I could get it tight, it still can wiggle a bit. The focus really gets affected.

    IMG_20181226_0959332
    IMG_20181226_0959482

    #80803

    IamSandX
    Participant

    I also have the same one David mentioned. All I had to do was focus the laser so far. Although all I have done with it is etched the mirror, and made a test run on a piece of cardboard.

    #81094

    David Walling
    Participant

    This post could not have come at a better time. I was just about to pull the trigger on this one:

     

    https://www.banggood.com/450nm-5W-Laser-Engraving-Module-Blue-Light-Marking-Engraver-With-TTL-Modulation-p-1337358.html?rmmds=search&cur_warehouse=CN

     

    I believe it’s the same as the 3.5w only a little more powerful. I’ll be watching this thread. I have the ramps board.

    #81117

    TomW
    Participant

    This post could not have come at a better time. I was just about to pull the trigger on this one:

    https://www.banggood.com/450nm-5W-Laser-Engraving-Module-Blue-Light-Marking-Engraver-With-TTL-Modulation-p-1337358.html?rmmds=search&cur_warehouse=CN

    I believe it’s the same as the 3.5w only a little more powerful. I’ll be watching this thread. I have the ramps board.

    I’ll be looking for opinions on the Banggood 5W too….. looks like a good deal.

     

    #81118

    Ryan
    Keymaster

    The more powerful typically the larger the spot size in diodes. So it is extremely deceptive.

    2 users thanked author for this post.
    #81144

    MegaDad3D
    Participant

    I have the Eleksmaker A3 laser with the 3500W laser from Banggood (same as above). The laser works with the Eleksmaker, but it uses TTL while the Mana board sends PWM. I could only get full power ON/OFF until I bought the “EleksMaker PWM to TTL Transition Module”. I don’t know if this applies to what you’re doing, but it’s a nice option fro US$5. I use T2laser to run it and can get it to output variable power.

    The power difference in the single-digit (watts) diode lasers isn’t staggering. They’re all pretty limited when it comes to cutting. Carving is not a problem.

    I like having a laser for engraving, but I kinda wish I’d gotten a 40W CO2 laser instead.

    #81211

    S Sauntson
    Participant

    The more powerful typically the larger the spot size in diodes. So it is extremely deceptive.

    Totally agree

    #81212

    S Sauntson
    Participant

    This post could not have come at a better time. I was just about to pull the trigger on this one:

    https://www.banggood.com/450nm-5W-Laser-Engraving-Module-Blue-Light-Marking-Engraver-With-TTL-Modulation-p-1337358.html?rmmds=search&cur_warehouse=CN

    I believe it’s the same as the 3.5w only a little more powerful. I’ll be watching this thread. I have the ramps board.

    I have my Laser attached to a RAMPS board and it is fully controllerable using the TTL, I followed the online firmware adjustment that Some Old Guy Coding did and changed pins from D9 too Pin44, very easy to do and I am now considering flashing GBRL firmware to my Ramps to make it even more controllerable.

    Will this project ever ends lol

     

    regards

    #81992

    Ron Craighead
    Participant

    Can’t wait to see what you guys can cut with this!

    My goal is to find a way to laser cut parts out of 1/4″ finish birch plywood. I’m REALLY interested to see if the 3500 can do it. When I get back in country, I’ll be building an Open Source Flight Training Device, and the goal is to make the ‘furniture’ portion a CNC cut, interlocking design, and I like working with Laser cut parts. I fell in love with it when making old Carl Goldberg model airplanes. I have no actual talent, so… They were die cut I think, but laser is basically the same. The laser can have the same effect, without the dogbone cuts necessary for router cuts.

    And, it’s a laser, and I’m basically a 12 year old. So laser. It’s just cool, and while I’m a 12 year old, I have a middle aged wallet.

    Ryan, this is your fault. 😉

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    #82005

    Jeffeb3
    Participant

    I think 1/4″ is pushing it. From what I’ve seen, 1/8″ is pushing it. Maybe air assist will help.

    #82007

    Ryan
    Keymaster

    Ryan, this is your fault. ?

    Had to make sure I wasn’t alone!

     

    I had a “40W” CO2, with best focus I could get through 1/4″ MDF. Plywood is typically a little easier but depending on the glue used can be more difficult. That is with a 40W, not a 3.5. If that is the end goal I wouldn’t get your hopes up. A few passes and serious air assist maybe, but a cnc is probably faster at that point.

    #82197

    S Sauntson
    Participant

    Evening Gents

    I hope this is not a stupd queston. I am using amended Marlin Firmware as in assigned Pin 9 to pin44 for the PWM of my Laser. after looking in to better software, it seems i would be better off running GRBL on my ramps board. well that the preamble done to my question.

     

    So does GRBL still use the assigned changed as per pin 44?

    Can anyone guide me towards better software for usng a laser ?

     

    regards in advance

    #82608

    Ryan
    Keymaster

    Okay my esteemed crew, I am almost there. A few sets of eyes and your overly honest opinions would be appreciated.

    Lasers

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