Reprap Forum - Developers Everybody here is a developer. Share what you are doing ! https://reprap.org/forum/list.php?2 Thu, 11 Jun 2026 00:33:15 -0400 Phorum 5.2.23 https://reprap.org/forum/read.php?2,896621,897613#msg-897613 Re: New generation extruder for FFF/FDM metal printing https://reprap.org/forum/read.php?2,896621,897613#msg-897613 Annirak Developers Wed, 10 Jun 2026 16:36:58 -0400 https://reprap.org/forum/read.php?2,897611,897611#msg-897611 Motor-off-tool tool open source changers https://reprap.org/forum/read.php?2,897611,897611#msg-897611
I have a list of gripes with the Bambu and Bondtech solutions.

First is chamber temp. Bambu will do 65 and INDX is rated to 60. That's not really enough for a lot of materials. I'd like to see multi-material at 100C-130C chambers.

Second is the tools themselves. They're pretty expensive, with the minimum cost bambu tool costing £33 for a normal tool, or £60 for an induction tool, with no option to use tungsten carbide tools. I don't think we know how the bondtech ones will play out yet. If done right, an induction tool could be just a heatsink, heatbreak, M6 spacer, and a nozzle. The prices we are seeing just don't make sense to me.

Third is bambu-specific, but the handling of flexible filament is really bad. You can't use the filament cutter and the AMS on anything at all soft, which means it can't support nozzle swaps, but at the same time, you're supposed to use only the right (swapping side) nozzle for it because the left (fixed) nozzle moves up and down.

I would love to see a truly open source tool changer. I think it's possible, but it's really tricky because there are a lot of ip rights. I had one idea that seemed semi-plausible, however: a tool-changing bowden system, with a ERCF-style extruder (1 motor, many selectable extruders).

I have a few other ideas like:
* a toolhead that hosts the motor, but not the extruder, and a clutch or gear is used to connect the motor to the extruder
* a toolhead that has the motor and the extruder, but the tension arm (and second drive gear) is on the tool

I played around with ideas like magnetic clutches, but nothing was really satisfying.

I'm still looking for that perfect solution but I haven't found it yet.]]> Annirak Developers Tue, 09 Jun 2026 04:44:44 -0400 https://reprap.org/forum/read.php?2,897498,897498#msg-897498 Building RepRap for new Kinematics class https://reprap.org/forum/read.php?2,897498,897498#msg-897498 I ordered a Duet3 mini 5+ to prototype on. 3.6-dev only seems to have a Duet3_MB6HC folder. Since I'm still just trying to compile at this time, I'm trying to build the MG6HC executable.

Should I be working from a different branch? 3.7-dev?

My host is Linux with eclipse. I'm using arm-none-eabi-g++ (Arm GNU Toolchain 15.2.Rel1 (Build arm-15.86)). Original development may have used version 13, but perplexity claims that some have reported success on v15.

If there is a better place to post my question, please let me know.

Thansk.]]> Mr.What Developers Wed, 04 Mar 2026 16:40:33 -0500 https://reprap.org/forum/read.php?2,896815,896819#msg-896819 Re: DELTACORE - "new" kinematics on Marlin https://reprap.org/forum/read.php?2,896815,896819#msg-896819
For example, look into the first attached image here: [reprap.org]]]> VDX Developers Fri, 09 May 2025 04:28:59 -0400 https://reprap.org/forum/read.php?2,896815,896818#msg-896818 Re: DELTACORE - "new" kinematics on Marlin https://reprap.org/forum/read.php?2,896815,896818#msg-896818 Any clue what patent it is or who owns it?
I quite ignorant about state of modern patent law, but can it possibly cover "providing software which facilitates functioning...", this is just math equasion.
And are there places where bulding patented design in privacy of your home is actually punishable ?]]> GIRATOR Developers Thu, 08 May 2025 15:42:17 -0400 https://reprap.org/forum/read.php?2,896815,896817#msg-896817 Re: DELTACORE - "new" kinematics on Marlin https://reprap.org/forum/read.php?2,896815,896817#msg-896817 dc42 Developers Thu, 08 May 2025 14:26:59 -0400 https://reprap.org/forum/read.php?2,896815,896816#msg-896816 Re: DELTACORE - "new" kinematics on Marlin https://reprap.org/forum/read.php?2,896815,896816#msg-896816 VDX Developers Wed, 07 May 2025 11:32:39 -0400 https://reprap.org/forum/read.php?2,896815,896815#msg-896815 DELTACORE - "new" kinematics on Marlin https://reprap.org/forum/read.php?2,896815,896815#msg-896815 Z axis is regular, while X and Y work like delta but in one plane.
It is named similar to corexy, because when two motors work in same direction it is only X-axis movement,
and when motors work in oposite directions it is arc movement mostly in Y-axis.
Check it out here: https://www.youtube.com/watch?v=YO74M19ytRc


In advance of any questions - I did it because I could, there are very few benefits and much compromises.
Main supposed benefit is ability to use heavy linear rails and ball-screws, but keep toolhead assembly ultra light.
Second, questionable, is ability to make entire bed assembly easy swappable, or collapsable to save space when not in use.
But all good is overshadowed by small shield-shaped printable area, which is equivalent to bed slinger but without corners.

If you for some reason interested in bulding another deltacore "unicorn", I made it relatively easy on software side.
Without clue how to do it using existing kinematics, I copied how delta is implemented in Marlin.
Everything tested except sensorless homing and bed leveling (only bilinear augmented, other theoretically should work as is).
Here is cleaned Marlin-2.1.2.2 with only deltacore-related changes:
"Marlin-2.1.2.2-deltacore-clean.zip" at Medifire - 9.26MB
And here is my bulid with other junk but gurantee to compile:
"Marlin-2.1.2.2-deltacore-prototype.zip" at Mediafire - 9.34MB
]]> GIRATOR Developers Wed, 07 May 2025 10:44:49 -0400 https://reprap.org/forum/read.php?2,896537,896632#msg-896632 Re: Affordable Open Source DIY Resin Printer https://reprap.org/forum/read.php?2,896537,896632#msg-896632
Projectors details

Mitsubishi EW270
Mitsubishi EW330
Infocus IN102
Dell 1210
Sharp XR 50S
NEC M230x
Infocus IN3136A
Casio XJ - V1 (laser)
Casio XJ-F210wn
Hitachi EX250
Dell p318
Dell 1220
Dell 1610HD
Dell 1510
Dell 1550
Sony VPL DX120
Sony VPL EX242
Sony VPL DX221
Sony CH375
Sony CH350
Panasonic pt-vx400nt
Panasonic vw530
Panasonic vw430
Panasonic vx430
Panasonic vw530
Panasonic lw300
Epson S02
Epson S41
Epson X31
Epson X05
Epson 955
Epson w05
Epson 660
Epson U05
Epson 1410wi
Epson 1430wi
Epson 485wi
Benq MS504/506
Benq MX525/528
Benq MX808
Benq MX806pst
Benq MW809
Benq Mx819st
Benq MW817/824st
Benq MW855ust
Viewsonic pa503s
Viewsonic LS600w
Optoma HD25
Ricoh WX2240]]> sudarshan Developers Sun, 09 Mar 2025 20:59:51 -0400 https://reprap.org/forum/read.php?2,896621,896626#msg-896626 Re: New generation extruder for FFF/FDM metal printing https://reprap.org/forum/read.php?2,896621,896626#msg-896626
Instead of a heated chamber to melt the material and extrude it in a "semifluid" state, I'm touching the surface with a "cold" wire and then only melt the tip, touching the surface, so it forms and releases a droplet of molten metal, if retracting the wire before switching the laser(s) off ... or, while pushing the wire into the melting zone and moving the head in XY it will release a "track", similar to the FDM printing prozess.

Was first meant for micro-printing sensor structures and connecting tracks -- managed to "draw" a 12 micron wide track with a 10 microns thick platinum wire for my project then (was around 2007) with a NdYAG-laser with 3 Watts averaged power or up to 8 Kilowatts pulse-peak power.

My actual lasers, suitable for this methode, are much stronger - CW-fiberlasers with (constant) max powers from 50Watts to 130Watts on a smallest spot of around 20 microns ... and IR-laserdiodes (salvaged out from broken 3kW and 6kW fiberlasers) with CW-powers of 135 to 360Watts on a minimum spot of roughly 200 microns (or bigger) ... so with the IR-laserdiodes for the "coarse" welding and the CW-fiberlasers for "fine" structures B)]]> VDX Developers Wed, 05 Mar 2025 17:11:26 -0500 https://reprap.org/forum/read.php?2,896621,896625#msg-896625 Re: New generation extruder for FFF/FDM metal printing https://reprap.org/forum/read.php?2,896621,896625#msg-896625 encrypted-tbn0.gstatic.com]]]> KILDET Developers Wed, 05 Mar 2025 14:49:43 -0500 https://reprap.org/forum/read.php?2,896621,896623#msg-896623 Re: New generation extruder for FFF/FDM metal printing https://reprap.org/forum/read.php?2,896621,896623#msg-896623
For the extruder -- with metal alloys and solid metals, melting them with lasers, it's a complete different and much easier setup - here it could be a simple wire-feeder, as used for wire wielding ...]]> VDX Developers Wed, 05 Mar 2025 14:30:12 -0500 https://reprap.org/forum/read.php?2,896621,896621#msg-896621 New generation extruder for FFF/FDM metal printing https://reprap.org/forum/read.php?2,896621,896621#msg-896621 KILDET Developers Wed, 05 Mar 2025 13:27:07 -0500 https://reprap.org/forum/read.php?2,896537,896616#msg-896616 Re: Affordable Open Source DIY Resin Printer https://reprap.org/forum/read.php?2,896537,896616#msg-896616 [www.lumindustries.com]]]> sudarshan Developers Tue, 04 Mar 2025 08:05:21 -0500 https://reprap.org/forum/read.php?2,896537,896596#msg-896596 Re: Affordable Open Source DIY Resin Printer https://reprap.org/forum/read.php?2,896537,896596#msg-896596 [www.thingiverse.com]
[www.thingiverse.com]
[www.thingiverse.com]
[www.thingiverse.com]]]> sudarshan Developers Sat, 01 Mar 2025 10:55:04 -0500 https://reprap.org/forum/read.php?2,896537,896549#msg-896549 Re: Affordable Open Source DIY Resin Printer https://reprap.org/forum/read.php?2,896537,896549#msg-896549
" for customers. I use a polygon mirror motor. Laser scanning is barely used in photopolymer printing. Formlabs abonded galvo and envisiontec abonded the 3SP. It is a only still uses in hybrid photosynthesis which is combination of beamer with galvo. I think there are applications in special photopolymer printing; bio printing, ceramics combining FFF with lasers. I am thinking of selling an assembled module around 400 euros"]]> sudarshan Developers Sat, 22 Feb 2025 12:42:50 -0500 https://reprap.org/forum/read.php?2,896537,896539#msg-896539 Re: Affordable Open Source DIY Resin Printer https://reprap.org/forum/read.php?2,896537,896539#msg-896539 Thanks for the suggestion. I had looked into them earlier, though my research has concluded that that those mirrors are not permeable for the strength of the laser needed for the SLA. I would be happy if proven wrong. Here are some of my references.

There is an idea of a lens free scanning with conical mirror. But I don't know how to get such a mirror.

[hackaday.io]
[hackaday.com]
[hackaday.io]
[hackaday.io]
[hackaday.io]]]> sudarshan Developers Thu, 20 Feb 2025 21:43:59 -0500 https://reprap.org/forum/read.php?2,896537,896538#msg-896538 Re: Affordable Open Source DIY Resin Printer https://reprap.org/forum/read.php?2,896537,896538#msg-896538 VDX Developers Thu, 20 Feb 2025 13:56:33 -0500 https://reprap.org/forum/read.php?2,896537,896537#msg-896537 Affordable Open Source DIY Resin Printer https://reprap.org/forum/read.php?2,896537,896537#msg-896537
That said, my research has landed me till here so far:

First, this is definitely not going to be an MSLA/LCD based build. Period! Thir availability is dear and far between, at least where I live, and their consumable nature doesn't bode well with the sustainable notion of this DIYable printer relative to the two other options. Its custom PCB requirement was another turn off.

Hence, we have two other options to go about the build:

1. A cartesian XY laser apparatus with a bottom-up/top-down bed system;
e.g. [www.instructables.com]
Pros:
Cheap and Simple, Rugged if done right. If you can get 9g servos in close loop to run precises enough and slap a relevant laser onto it (mirrored ofc), it may very much be ready to run with a Z-axis and a vat.
Cons:
Slow, unless one uses the costly galvos, scanning is slow. Stepper based galvo solutions are neither fast nor accurate enough in the absence of the f-theta lens which is costly. At least one example exist for a lens free solution (https://www.youtube.com/watch?v=38B44MFpHo0) but haven't explored that too much. Welcome to hear solutions on this one.
and

2. A DLP Projector based printer as was staple in the now dead buildyourownsla.org fora. e.g.:
[www.instructables.com]
[www.instructables.com]
[www.instructables.com]
[www.instructables.com]

Pros:
Simpleish. Its most complex component, the projector, is ready-made, recyclable, and depending on the modification requirements, dual use (watch a movie on it on the off times).
Many companies like the Elgoo Mars 4DLP and Anycubic Photon 2 DLP are making a comeback to this technology thanks to its longevity.
Have some solid reference builds in DropLit and LittleRP printers (https://github.com/goopyplastic/littlerp2)
Cons:
Most listed projectors on the build your own SLA website are out of even the secondary market. Documentation is out of date and the fora talking about it are long dead.

The DLP Projectors available now to me are:
Refurbished NEC NP40 DLP Lightweight Portable Projector

Brand NEC Image Brightness 2200 ANSI Lumens Type Desktop Display Technology DLP Maximum Resolution 1080i (FHD) Model NEC NP40 Connectivity VGA/SVGA D-Sub, S-Video, RCA Features Portable Native Resolution 1024 x 768 Aspect Ratio 4:3

2) Refurbished Sharp PG-MB60X DLP Projector Product Information With DLP display technology, the Sharp PG-MB60X is a high performer conference, classroom series projector. With 2500 ANSI Lumens, this Sharp DLP projector delivers bright clear images in any lighting condition. The 1024 x 768 native resolution of this Sharp multimedia projector projects true-to-life images with vivid colors. The HDTV Ready feature of this Sharp DLP projector brings crystal-clear high-definition images to your presentation. Whereas, the 1200:1 contrast ratio of this Sharp multimedia projector delivers brightest white and darkest black images. Placed at a distance of 1.8 – 9.1m, the Sharp PG-MB60X projector throws clear images sized 102 – 762cm. Product Identifiers Brand Sharp MPN SHRPGBM60X, PG-MB60X, PG-MB60X SHRPGBM60X UPC 0074000364318 Model PG-MB60X eBay Product ID (ePID) 66747921 Product Key Features Display Technology DLP Image Brightness 2500 ANSI Lumens Contrast Ratio 1200:1 Dimensions Weight 8lb. Additional Product Features Platform M·A·C, PC Products Native Resolution 1024×768 Form Factor Portable Features Keystone Correction

3) Refurbished ViewSonic PJ 506D DLP Projector

Brand ViewSonic Special Feature speakers Display resolution 800 x 600 Display Resolution Maximum 800 x 600 Display Type DLP About this item ViewSonic PJ506D – DLP projector – 2000 ANSI lumens – SVGA (800 x 600) DLP technology delivers crystal-clear images and brilliant color Portable projector is ideal for multimedia lessons in the classroom Support for 720p and 1080i HD signals Features & Specs

Contrast Ratio 2000:1 Lamp Wattage 200 Watts Hardware Connectivity VGA Mounting Type Tabletop Mount Wattage 250 watts Controller Type Button Control Additional Features speakers Native Resolution 800 x 600 Display Resolution Maximum 800 x 600 Display Type DLP Form Factor Portable

4) Refurbished TOSHIBA TDP T45U Portable DLP Projector

Brand TOSHIBA Special Feature speakers Connectivity Technology composite_video Display resolution 1024 x 768 Display Type DLP About this item Portable DLP Projector XGA 1024 x 768 Display Resolution/ 2500 Lumens 2000:1 Contrast Ratio 36 to 300 Inches Image Size/ 11.5 to 100 Projection Distance 7.50 Lbs (WxLxH) 9.00″ x 13.00″ x 3.90″ Features & Specs

Contrast Ratio 2000:1 Maximum Image Size 300 Inches Lamp Wattage 190 Watts Minimum Image Size 36 Inches Hardware Connectivity Composite Video Wattage 1 watts Additional Features speakers Connectivity Technology composite_video Native Resolution 1024 x 768 Display Type DLP Form Factor Portable




From the first Instructable under Option 2:
"....The dose is divided in to three vectors as you will, namely photon energy, light intensity and duration of illumination, together giving the total energy dose. Usually in the UV curing of materials the dose is only measured for a specific part of the spectrum. The rest of the light will usually be reflected or absorbed and converted in to heat.
Only photons with a high enough energy will take part in the photo polymerization. This means that the resin that you will be using is the determining factor in the part of the light (electromagnetic) spectrum that we are interested in. Most photo curing resins will cure under the influence of UV light. Light with a wavelength of between 365nm and 420nm.
Some resins also allow for curing with longer wavelengths but these are usually rare and expensive.

1) One of the things to consider is that in order to be able to print with a wide range of resins we would like as much UV in our light as possible. I will explain this in depth when designing the basin, mirror and anti stick coating.

The other part is time of illumination and illumination intensity. The illumination intensity, or luminous flux is the amount of Photons per unit of time that is emitted by the light source. The longer you illuminate the resin the deeper the light penetrates and the harder and thicker your printed layer gets. This is a very unique feature of stereo lithography where the illumination time is another factor to consider as this determines the build layer thickness.

2) The light source must be of high intensity so the illumination time can be as short as possible allowing for a faster build.
3) An other thing to consider is that the light source needs to be very controllable in switching from illuminating the resin to not illuminating the resin.

In the principle of photo lithography, what gets illuminated polymerizes and what does not get illuminated stays liquid. This means that our resolution or minimum feature size is determined by the minimum spot size.

3) The third parameter for our light source is that it must have the possibility to illuminate a spot that is as small as possible.

Googleing we found that there are two viable light sources/systems that will meet these demands. A blue/UV laser with nice optics to produce a small spot size and a Galvo Head or A DLP projector. A Lasers are cool but to achieve a small accurate spot with a galvo system felt to us as going way over our heads. Since non of us has any experience in setting up a laser, laser optics and a galvo system. And having the guys from Form 1 as an example (patent issues), maybe one day we would like to offer the world a kit too. We decided to go for the DLP projector option.
....As from our considerations in the above we can easily state what properties we want our projector to have:
high UV content (determines if the projector works to cure the resin)
high light intensity (shorter cure time)
high contrast ratio (gives a higher resolution with less light contamination)
high resolution (results in a smaller feature size)"

Given the above considerations, I now looking forward to your recommendations. From hereon, this forum would also serve as the build log of this printer.]]> sudarshan Developers Thu, 20 Feb 2025 10:21:47 -0500 https://reprap.org/forum/read.php?2,894835,894835#msg-894835 Serial port responses, Marlin 2.1.2.1 https://reprap.org/forum/read.php?2,894835,894835#msg-894835
I need clarification regarding the additional serial port responses in Marlin 2.1.2.1 firmware.

In Marlin firmware, when a command is sent to a specific serial port, is the response sent back to the same port that received the command?

Can the responses on the additional serial ports be customized? If so, where in the software can I make these customizations?

Thank you very much for your assistance.]]> lukaari Developers Fri, 17 May 2024 23:08:30 -0400 https://reprap.org/forum/read.php?2,894553,894553#msg-894553 Help with custom stl file. To enable an option in the file https://reprap.org/forum/read.php?2,894553,894553#msg-894553
I've built myself a workshop however I don't want a visible lock on the door so naturally I'm going to make it a vault locking door because why not.

My plan so far is to use a RFID reader connected to a rpi which will open a command and send it to a 3d printer controller board with a custom version or marlin on it. Basically marlin that just moves 5 motors back and forth. Each rod will have a start and end endstops to make sure it's locked or unlocked.

My question is this, is it possible to write an stl script that if the endstop at one position is detected it will move in the other direction to the other endstops?

I ask because the script on the pi wouldn't be able to tell if the door is locked or unlocked or can an endstop be connected to a rpi then I can write 2 scripts depending on if the door is locked or unlocked?]]> Bossydale Developers Wed, 20 Mar 2024 16:46:03 -0400 https://reprap.org/forum/read.php?2,894377,894377#msg-894377 Marlin 2.1.2.1 MKS Gen L v1 - Enable Laser cooling - disable 3 servos https://reprap.org/forum/read.php?2,894377,894377#msg-894377
I am currently using the MKS Gen L board, and I've encountered an issue with the Laser Cooler loop functionality. To enable the Laser cooling feature, I had to disable three servos, which are typically in use.

Enabling Laser cooling utilizes all available timer resources on the board, necessitating the removal of three out of the four servos I usually employ.

I am seeking assistance from anyone capable of:

a) Writing the necessary code to integrate separate cooler temperature control into Marlin 2.1.2.1 , or

b) Modifying an existing hotend PID loop to function as a cooler loop , or

c) Adding a configuration option where user can choose to use the cooler with or without the laser features so it does not monopolize timer resources, thereby allowing for the proper addressing of servos.
This option should be commented in the configuration_adv file.

Please let me know if you are able to assist.

Thank you.]]> lukaari Developers Tue, 13 Feb 2024 21:59:20 -0500 https://reprap.org/forum/read.php?2,894344,894376#msg-894376 Re: Monster8 - Marlin 2.1.2.1 Configuration for XYZE0E1AUV + Laser cooling https://reprap.org/forum/read.php?2,894344,894376#msg-894376 VDX Developers Tue, 13 Feb 2024 17:46:33 -0500 https://reprap.org/forum/read.php?2,894344,894374#msg-894374 Re: Monster8 - Marlin 2.1.2.1 Configuration for XYZE0E1AUV + Laser cooling https://reprap.org/forum/read.php?2,894344,894374#msg-894374
Many years ago i did my share, when Graupner was the leading company, using almost all thair products, including their wankel motor. (tu)
I did some work with dispensing dot of the UV cured glue. Problem with the dot was that dot had volume and UV curing take few seconds to cure, and curing is not unifirm.

Currently my focus is on the Marlin and boards for my project. I was using MKS GEN L v1 where I add the laser cooling loop. Using laser option and laser control PWM timer CPU lose timer resource and I lost 3 servos. Not sure how to to fix this except to ask someone to modify the temperature range of the bed or the chamber PID loop, or add another chamber PID loop. This will be also very useful for the wax printing!
Can you please let me know if you have somebody who can do it.
Thanks]]> lukaari Developers Tue, 13 Feb 2024 13:40:24 -0500 https://reprap.org/forum/read.php?2,894344,894371#msg-894371 Re: Monster8 - Marlin 2.1.2.1 Configuration for XYZE0E1AUV + Laser cooling https://reprap.org/forum/read.php?2,894344,894371#msg-894371
Some years ago, when developing jetting paste-dispensers, I've used Marlin4Due together with Pronterface/Printrun to control the dispensers ... later I've updated/modified it for laser-engraving too

As all my tools are controlled by PWM or pulsing, it's suitable for all sorts of applications, regardless of the emitted power, when working with lasers.

Here is a thread about in the English forum (but the vimeo videos don't work anymore) - [reprap.org]

And here a longer thread in the German forum - [reprap.org]


And here, in my youtube channel, you can find some related videos - [www.youtube.com]]]> VDX Developers Tue, 13 Feb 2024 01:35:40 -0500 https://reprap.org/forum/read.php?2,894344,894370#msg-894370 Re: Monster8 - Marlin 2.1.2.1 Configuration for XYZE0E1AUV + Laser cooling https://reprap.org/forum/read.php?2,894344,894370#msg-894370
Here in New York, manufacturing is chased out by the real-estate developers :(

Are you actually repair the lasers to the condition that you can make machine and do some metal cutting.

As hobby I actually testing the Marlin with some boards to see if it can be repurposed as for example robot or the cnc controller.

Not sure about the reliability and precision. I have few of the 3d printers and xyza desktop assemblies. I just tested the MKS Gen L and Monster8 but I need to test the configuration with all 8 steppers.
I got one 3d printer combo 3d printer and laser aas module... but it can do only wood and possibly acrylic.

Did you tray to combine the marlin with higher power laser on any larger fixtures?

Check the Sorenson switching power supply's they go up to 150A or more,]]> lukaari Developers Mon, 12 Feb 2024 17:31:15 -0500 https://reprap.org/forum/read.php?2,894344,894369#msg-894369 Re: Monster8 - Marlin 2.1.2.1 Configuration for XYZE0E1AUV + Laser cooling https://reprap.org/forum/read.php?2,894344,894369#msg-894369
The housing in the images is from a 50 Watt CW fiberlaser - have several with different wreckage types ... some with exploded fiber-couplings for backreflection ... some with broken electronics (one with 130Watts is emitting fine, when supporting the diodes with current only) ... some with cut external fiber ...

They are all air-cooled - the housing is a "sandwich" of two cooler-plates with the fins in the center, where the air is forced through ... and the electronics, diodes and fibers are placed in the visible cavities, then covered with a metal sheet.

The two diodes in the image are salvaged from a (watercooled) 3kW or 6kW pulsed fiberlaser ... have several (nearly identical buildup) of this diodes with output powers of 135W, 200W, 270W and 310W ... the pumping diodes from the broken/salvaged CW-fiberlasers are much smaller/weaker - 5W, 9W, 25W, 30W ... but then too up to 40(!) of the diodes per laser B)-

The CW-fiberlasers are controlled only by the current through the diodes ... the 200+W, I'm using too with adjustable current modulating - they start to emit at around 2-3 Amps, then linear rising up tomax power (135, 200, 270, 310W) with the specific max currents of 12V for the smaller to 15V for the bigger ... and max. currents of 35, 40 and 43 Amps.

I'Ve developed some drivers for them with adjustable "constant current" of up to 20A per driver and placing two of them parallel vor higher current ... modulating the current with up to 50kHz (or up to 200kHz for the "smaller" IR-diodes from the CW-fiberlaers)]]> VDX Developers Mon, 12 Feb 2024 14:46:25 -0500 https://reprap.org/forum/read.php?2,894344,894368#msg-894368 Re: Monster8 - Marlin 2.1.2.1 Configuration for XYZE0E1AUV + Laser cooling https://reprap.org/forum/read.php?2,894344,894368#msg-894368
What I'm observing on the left appears to be a cover positioned over the lasers, correct? I'm assuming the lasers are cooled through the bottom, but I'm curious, is that plate liquid-cooled? I wonder if the lasers can adjust their power output, and if so, does the cooling block of the material have enough thermal inertia to accommodate these changes?

Could you provide more details on the laser specs? Specifically, what's the laser power and what kind of cooling is recommended by the manufacturer? Also, do you have the rest of the laser setup, including the fiber combiner, lenses, colimator, etc.?

Just out of curiosity, where are you located?]]> lukaari Developers Mon, 12 Feb 2024 12:03:35 -0500 https://reprap.org/forum/read.php?2,894344,894367#msg-894367 Re: Monster8 - Marlin 2.1.2.1 Configuration for XYZE0E1AUV + Laser cooling https://reprap.org/forum/read.php?2,894344,894367#msg-894367
Here some images of the setup with 2 of the diodes and 3x Peltiers under every diode and a 10mm alu sheet for heat-distributing ... for an ambien temp. of around 20degC the emitted hot air will be at around 55 to 60degC at full power:

[attachment 120808 IPG-Leergehaeuse.jpg] [attachment 120809 DDL-Aufbau-Basis2.jpg]]]> VDX Developers Mon, 12 Feb 2024 09:52:55 -0500 https://reprap.org/forum/read.php?2,894344,894366#msg-894366 Re: Monster8 - Marlin 2.1.2.1 Configuration for XYZE0E1AUV + Laser cooling https://reprap.org/forum/read.php?2,894344,894366#msg-894366
Achieving laser cooling up to around the kilowatt (KW) level can be accomplished using Peltier devices.

However, these Peltiers are power-hungry, requiring efficient driving with a current source.

Initially, I attempted to utilize one of the Marlin temperature loops, leveraging the PID autotune feature, to drive the Peltier. Unfortunately, PWM drive output is not the optimal method for driving Peltiers.

Instead, I've implemented an external laser cooler loop, albeit less precise, which work for the moment.

Using the MKS Gen L v1 board, integrating the laser cooling loop necessitated removing three servos, leaving only one servo and three spare pins on the board :( .

Considering these constraints, I've acquired the MKS Monster8 board and seek insights from anyone who has experience with this board, referencing my original post.]]> lukaari Developers Mon, 12 Feb 2024 09:13:07 -0500