Reprap Forum - Developers

Building RepRap for new Kinematics class (no replies)

Mr.What — Wed, 04 Mar 2026 16:40:33 -0500

I'm trying to build RepRapFirmware 3.6-dev as a platform to test my new Kinematics class. I'm getting a C++ syntax error, but it is not trivial for me to come up with a fix.
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.

DELTACORE - "new" kinematics on Marlin (4 replies)

GIRATOR — Fri, 09 May 2025 04:28:59 -0400

Hi, I want to share "new" kinematics combination I implemented - deltacore.
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

New generation extruder for FFF/FDM metal printing (3 replies)

KILDET — Wed, 05 Mar 2025 17:11:26 -0500

Hi, I am currently working on a project that deals with the design of an extruder (hot end+cold end) that should allow conventional FFF 3D printers to directly process metal alloys such as aluminum or zinc alloys. Imagine if your printer would be able to process not only PLA, ABS, PETG , but also metals after minor modification. You could then produce components with greater strength and durability. This proposed extruder would work with metal wire, which is used for welding, for example. I would need to know your opinion on this new opportunity. If such a thing existed, would you be interested? What benefits do you think it could have for you? What problems could it pose for you? Any opinion is valuable to me thank you.

Affordable Open Source DIY Resin Printer (6 replies)

sudarshan — Sun, 09 Mar 2025 20:59:51 -0400

Ahoy there folks and my inspiration digital dentist (wherever you are in this now silent RepRap universe). Owing to the lack of proper open source, DIYable resin 3d printers, and the hot mess that tariffs has become for my hobbies of late, I have resolved to put my hat into the arena to build one for the benefit of the general-public and the posterity, trying to keep it under $300 apx. So help me O the great noodly monster of the Printverse!

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.

Serial port responses, Marlin 2.1.2.1 (no replies)

lukaari — Fri, 17 May 2024 23:08:30 -0400

Hi,

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.

Help with custom stl file. To enable an option in the file (no replies)

Bossydale — Wed, 20 Mar 2024 16:46:03 -0400

So as is always the way I've had an idea which is a really good idea.

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?

Marlin 2.1.2.1 MKS Gen L v1 - Enable Laser cooling - disable 3 servos (no replies)

lukaari — Tue, 13 Feb 2024 21:59:20 -0500

Hello,

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.

EMO PIG- 90% 3d printed prusa i3 clone with a twist (no replies)

kokodin — Sun, 11 Feb 2024 06:18:34 -0500

Well hello there. I am going crazy with doing things by myself, so i thought i will share my pain with others and maybe some of you will know what am i doing wrong.

Recently i made something stupid. I downloaded from prusa all the mk3s files, printed or modyfied a lot of those files, some were made from scratch to replace cnc parts and thus EMO PIG was born. (or Original Prosiak how it is called in polish)

And it almost work but not quite as i would like.
I have some limitations (because i wanted to show off kids at school i work at you don't need high budget to make a printer) like using ramps and arduino mega, character based screen, Zrods being m8 thereaded rods, and bearings are 3d printed shells with ptfe tube liners runing on stainless rods, It uses the cheapest power suply i could find, used hp computer that only had 2 12V outputs and both of them could push 12-16 amps. But i also have bigtree tmc's 2130 in spi and sensorless homing is working (and that like 1/3 of the budget too), I use ir switch as a z probe that works too. printer is mostly made out of pink and black pet-g but pink is more magenta than pink :]
Currently I am using marlin 2.1 from way back i made my last printer, but for some reason i would like to port actual prusa firmware to run on it, just for kicks.and the latest firmware seems the most interesting so i installed all the ide stuff required to compile it and.
For some reason prusa frimware compiles always at around 640kb while atmega is only 1/3 of that so i have no idea where rambo stores it if it also uses atmega 2560 and i can't find a schematic that shows that 2mb serial flash mentioned in changelogs. or am i so dumb to not see it, because i most likely would have to hack something like that into the ramps to have it working. Hacking things in is not a problem, knowing what to do kind of is.

I am currently at a phase that my project kind of work, meaning i can put sd card in and print small things from pla on unheated bed but things that takes more than one hour kind of die from heat creap in cheap hotend knokof and it is very moody

if you are interested in seeing it or know what am i doing wrong let me know, i probably post some pictures anyway but if you are interested in any specyfics i gladly share what i developed so far in details, (if we can call stealing from prusa a development)
but i think that without help i probably just be forced to be unhappy and just chuck newest stable marlin into it and call it good , because i am 2 months into it and i am loosing will to continue what i set as a goal. so help wpild be apriciated, or just audience and some support.

Bed and Cooler icons are overlaping on the display MKS MINI 12864 v2 (no replies)

lukaari — Sat, 10 Feb 2024 19:27:06 -0500

Hi,

I added the chamber to the configuration, compile ok, but Bed and Cooler icons on the display MKS MINI 12864 v2 are overlapping.

Solved, by adding the #define STATUS_COOLER_X 33 in the config file, will shift the cooler to the left in the place of the second hotend which i dont use.

Monster8 - Marlin 2.1.2.1 Configuration for XYZE0E1AUV + Laser cooling (11 replies)

lukaari — Tue, 13 Feb 2024 17:46:33 -0500

Hi,

Is any chance that you can help me or run the scan program Marlin 2.1.2.1 for the MKS Monster8 board with MKS Mini12864 v3.0 display for the configuration - XYZE0E1AUV + Bed and Laser cooling. - First hot end using MAX31855, using -3 option

You run the similar scan for the my MKS Gen L board, it was so helpful, it make me understand all changes in few minutes.

Please let me know if you need any other information.

Thank you very much.

#define TEMP_SENSOR_0 -3
#define TEMP_SENSOR_1 0
#define TEMP_SENSOR_2 0
#define TEMP_SENSOR_3 0
#define TEMP_SENSOR_4 0
#define TEMP_SENSOR_5 0
#define TEMP_SENSOR_6 0
#define TEMP_SENSOR_7 0
#define TEMP_SENSOR_BED 1
#define TEMP_SENSOR_PROBE 0
#define TEMP_SENSOR_CHAMBER 0
#define TEMP_SENSOR_COOLER 18
#define TEMP_SENSOR_BOARD 0
#define TEMP_SENSOR_REDUNDANT 0

Monster8 - can we copy or download original configuration files, form the board ? (1 reply)

lukaari — Thu, 08 Feb 2024 19:51:55 -0500

Hi,

Monster8 board. Can we see, copy or download original configuration files form the board ?

Thank you,

Monster8 / Marlin 2.1.2.1 , did anyone test the configuration XYZE0E1UVW ? (no replies)

lukaari — Mon, 05 Feb 2024 01:20:19 -0500

Hello,

I just got the Monster8 V2, loaded it with the Marlin 2.1.2.1 and test the basic XYZE0 on the bench with steppers, hotend, bed, with out the 3d printer mechanicals. It worked fine.

Just wondering if anyone has test the full configuration XYZE0E1UVW or for example, or similar.

And if you did, can you please share your experience.

Thank you

Marlin 2.1.2.1 #error "No auto-assignable Spindle/Laser pins available." (2 replies)

lukaari — Sat, 03 Feb 2024 15:59:46 -0500

Hello,

I successfully configured the cooler, but encountered a compiler stoppage during code compilation with the following message:

In file included from C:\Marlin-2.1.2.1\Marlin\src\pins\ramps\pins_MKS_GEN_L.h:62:0,
from C:\Marlin-2.1.2.1\Marlin\src\pins\pins.h:119,
from C:Marlin-2.1.2.1\Marlin\src\inc\MarlinConfig.h:34,
from C:\Marlin-2.1.2.1\Marlin\src\HAL\AVR\eeprom.cpp:24:
C:\Marlin\src\pins\ramps\pins_RAMPS.h:316:6: error: #error "No auto-assignable Spindle/Laser pins available."
#error "No auto-assignable Spindle/Laser pins available."
^~~~~

exit status 1

Compilation error: #error "No auto-assignable Spindle/Laser pins available."

It took me some time to get the cooler loop working, but I had to remove 3 out of 4 servos. I suspect a pin conflict might be the issue. I attempted the following:
a) In Marlin-2.1.2.1\Marlin\src\pins\ramps, I rearranged servo pins to check for additional servo activation, but without success.
b) I also tried reassigning laser pins, but that didn't resolve the issue either.
I attached configuration and pin files of the working code with one servo.
Thank you for any help or sugestion.

Marlin 2.1.2.1 Config: 2 Hotend loops, one Extruder, reasighn E1 to U pins (2 replies)

lukaari — Sat, 03 Feb 2024 18:16:42 -0500

Hello,

I'm using the MKS Gen L v1 board, Marlin 2.1.2.1 with aim to make configuration of XYZE0U with 2 hotend loops with only one extruder in use.

I aim to reassign E1 to unused or virtual pins and use the current E1 pins for a new U axis.

What are the minimum changes needed in the existing configuration to add U axis with min end stop plug?

Any help or suggestions would be appreciated.

Thank you.

How to setup 3.5k thermistor parametars in Marlin 2.1.2.1 (8 replies)

lukaari — Fri, 02 Feb 2024 23:46:25 -0500

Hello,

I need help configuring the Marlin 2.1.2.1 to use thermistor which resistance is 3,5k at 25C.

I am using MKS Gen L board V1. I tested several options config file but I always got reading over the 100C.

I think you for any help or recommendation

X and Y will home, but will not read G1 from SD card (1 reply)

radiumsilver — Mon, 09 Oct 2023 21:59:28 -0400

Hello,

I am building a simple bot using Marlin Firmware and TMC2209 stepper motors. This machine runs the X, Y and Z axis and it's purpose is simply to dispense glue. My issues is that for some reason when I insert an SD card and select a simple g-code program it will run the homing for X, Y and Z, but then commences to only run the Z axis, X and Y will not move. This is frustrating as when I connect to pronterface everything works fine all axis respond. I have tried a myriad of different g codes and sequences and every time it's the same, everything will home, but only the z will run. I have attached my modified Marlin config files along with a one code I've tried to run. I have read through a many different forums, but haven't found any solutions. I have tried using the 998 and 999 dummy thermistors, and have played with the feed rates.

Thank you in advance!

Re: What Does A Developer Do With AI? Position Description and Duties (-1 replies)

Dust — Wed, 31 Dec 1969 19:00:00 -0500

This is just a spammer, linking through to their search engine optimization AI tool.

Is not reprap related

Re: What Does A Developer Do With AI? Position Description and Duties (-1 replies)

VDX — Wed, 31 Dec 1969 19:00:00 -0500

... as the AI isn't much more capable then me, it's more suitable as "personal assistant" for handling and organizing all the tiring tasks to give me more free time and easier/lazier life B)-

Cannot receive data from 3d printer but sending it successfully (2 replies)

mile — Wed, 06 Sep 2023 17:11:23 -0400

Hello, im trying to build a simple app as a learning project but im running some issues. So im successfully connecting through serial port and sending data to my printer (tried to send G28 and it homes) but when i try to read data for example i sent M503 i receive nothing. So my question is could it be that i need to set Databits, StopBit , Parity etc , if so where can i find them in my firmware. Im using Marlin 2.1.2 and Bigtreetech SKR 1.3. Thank you

4 months in 6 minutes (2 replies)

deckingman — Thu, 27 Jul 2023 05:00:06 -0400

I've just posted a little video on my YT channel that you might (or might not) like. Essentially it condenses the 4 months of my new printer build, from concept through design, manufacture and assembly to working machine, into 6 minutes. Being "all metal" (no printed parts other than those needed for electrical insulation purposes), it's hardly a RepRap but these forums long ago departed away from that concept so I don't feel too bad about posting a link here. [youtu.be]

Changing Control Boards?Need your help (no replies)

Nuthead — Thu, 18 May 2023 17:45:17 -0400

Hi, I have an Ultimaker 3 and I want to get rid of the Ultimaker firmware,screen, and print head. I am planning on using a Creality control board, running the Ender 5 firmware, and putting in a Creality print head, and screen. I am not sure if there would be any issues that I am not considering, or if there is a better way to go about doing this.Please share your ideas. Thank you so much.

Berdair MOSFET board (no replies)

OutcastZeroOne — Tue, 11 Apr 2023 09:46:39 -0400

MOSFET boards are nothing new. What I never did find was a board that fit on the back of the 555 motor of the pump :D

[attachment 120288 EA9BA10C-3E80-4F15-AFC5-BE657C28CAC3.jpeg]
[attachment 120289 13393802-9BBC-4F2F-B0F4-029054F9F0CF.jpeg]

I have a small PWM signal generator to help figure out the best PWM frequency for the motors. Found my 24v likes 20hz, while the 12 prefers 30-40hz. Outside the ranges it would stumble or make horrible high pitched whines.

Video of testing the 12v Berdair pump

As for the boards themselfs I used Digikeys Redboard service. Boards where made by a local shop in California, which surprised me there was a place so close by. 10 day turnaround from ordering to in my hand and cheaper than JLC with the same settings. They didn’t drill the center hole but sent me 2 extra boards, so kind of a trade off :P

My custom watercooling setup (7 replies)

OutcastZeroOne — Tue, 11 Apr 2023 08:59:18 -0400

I’ve been working on a water cooled hotend for my printer for a number of years now. Since about mid 2018. Back then options where limited and I opted for full custom setups of everything.

Right now I’m running a custom made watercooled hotend, stainless steel water jacket printed by JLC PCB for me over a heatsink I cut on a lathe I designed and printed. Cooling is done via a coil cooler that is microcontroller controlled based off temperature of the fluid. Still working on the firmware for that but as it sits now here are some pictures of things.

3d printed wind turbines collection (no replies)

esposcar — Sat, 11 Feb 2023 10:41:29 -0500

Hello, we are a group of friends that is developing several vertical/horizontal wind turbine devices and we are also developing a new concept of a multi-stage VAWT. A group of students at the Munich University of Applied Sciences have asked us to give them information for their construction class project of our multi-stage & multi-generator vertical wind turbine system and they delivered in June a pdf of 107 pages that we have attached in this topic.

This is our website where it can be found several videos and other things about our projects,
https://www.kolibriwindstorm.com/

And below you can find a video that shows all the devices in action,
https://youtu.be/WNd7hWqSSfQ

imgonline-com-ua-twotoone-71KAFen4ytW7Y%281%29%282%29.png

UniAleman6.png

WM-Screenshots-20221231213512.png

272196301_924452018252634_1803611599617494301_n.png

Prototype.png

marlin2.1.2 on Geeetech A20M with SKR V1.4 (3 replies)

ALF — Tue, 17 Jan 2023 06:24:16 -0500

Good morning, being beginner on this forum I shall ask you to be forgiving
I have a GEEETECHA20M of which the card mother in grilled. I have decide to take up SKR V1.4 (changes already made on another simple extruder printer and 100% fonctionnal).
When I take shape Marlin 2.1.2 for GEEETECH A20M and that I compile no problem, no error.
When I make modifications essentials to adapt it to SKR 1.4 nothing more go. (see below.)
Would be there one worries in librairies LPC1768?
shape with TMC2209, BL Touch, sensorless homing on axles X and Y, bed traming

here is the messages of error emanate from VS Encode:

In file included from Marlin\src\feature\../sd/../inc/../HAL/./LPC1768/../shared/Marduino.h:36,
from Marlin\src\feature\../sd/../inc/../HAL/./LPC1768/HAL.h:37,
from Marlin\src\feature\../sd/../inc/../HAL/HAL.h:30,
from Marlin\src\feature\../sd/../inc/MarlinConfig.h:31,
from Marlin\src\feature\../sd/cardreader.h:24,
from Marlin\src\feature\runout.h:28,
from Marlin\src\feature\runout.cpp:31:
Marlin\src\feature\runout.cpp: In function 'void event_filament_runout(uint8_t)':
Marlin\src\feature\../inc/../../Configuration.h:1824:34: warning: too many arguments for format [-Wformat-extra-args]
1824 | #define FILAMENT_RUNOUT_SCRIPT "M600 T1c"
C:\Users\alf26\.platformio\packages\framework-arduino-lpc176x\cores\arduino/Arduino.h:58:18: note: in definition of macro 'PSTR' 58 | #define PSTR(v) (v)
| ^
Marlin\src\feature\runout.cpp:132:30: note: in expansion of macro 'FILAMENT_RUNOUT_SCRIPT'
Compiling .pio\build\LPC1768\src\src\gcode\bedlevel\G26.cpp.o
132 | sprintf_P(script, PSTR(FILAMENT_RUNOUT_SCRIPT), tool);

Could you please help me?

Edit Marlin for Polar Coordinates (3 replies)

dexrod — Mon, 18 Sep 2023 14:32:48 -0400

Hey all!

I'm building a cantilevered 3d printer, similar to the one in the attached picture. However, I'm not sure how to adapt Marlin to account for this. I need rotation of the arm around the z axis, change of the length of the arm, and the linear motion along the z axis (up-down) shouldn't need any changes since I'll just be using threaded rods for that.
Thanks!

fighting with M808 Loop (no replies)

Alvon3DprinTor — Sat, 24 Sep 2022 10:06:09 -0400

Hi everybody,

I'm trying to make a 45° extension module to make little infinite printing just when I need it.

see : Youtube Short : 45°deg GA3D.tech M808 test

337px-GA3Dtech45deg.jpeg

I've a few problems to understand exactly what is happening with the M808 loop when it works, and when not

This example works :

G92 X0 Z0 Y0 E0 ; set start position to 0 0 0 Reset Extruder

M140 S0
M105
M190 S0
M104 S0
M105
M109 S0

M808 L10        ; Set Marker to repeat 10 times
M300 P100 S440  ; Beep!
M300 P10 S0     ; Silence
M808            ; End Marker

M808 L10
G92 X0 Z0 Y0 E0 ; set start position to 0 0 0 Reset Extruder
G1 F9000 X0 Y0
G1 F9000 X30 Y0
G1 F9000 X30 Y-120
G1 F9000 X10 Y-120
G1 F9000 X30 Y-120
G1 F9000 X30 Y0
G1 F9000 X0 Y0
M808

the following one stops after one loop, I have no idea why (after 30 try in all direction I'm lost...)

If you are experienced with that, or If you see my stupid mistake it would makes me very happy :), thank you very much in advance for advices and remarks.

I use marlin 2.1.1 on a good old ramps 1.4 with an arduino meg 2560

;FLAVOR:Marlin
;TIME:4286
;Filament used: 2.25787m
;Layer height: 0.2
;MINX:45.274
;MINY:23.901
;MINZ:0.2
;MAXX:127.694
;MAXY:54.991
;MAXZ:77.2
;Generated with Cura_SteamEngine 5.0.0
M140 S0
M105
M190 S0
M104 S200
M105
M109 S200

G92 X0 Z0 Y0 E0 ; set start position to 0 0 0 Reset Extruder
;Extruder Relative mode
M83
;LAYER:31
;TYPE:WALL-OUTER
;MESH:profil002a.stl




M808 L500
G92 X0 Z0 Y0 E0; set start position to 0 0 0 
M83
M109 S200
G1 F3000 X0 Y0
;TYPE:WALL-OUTER
;MESH:profil003a-Cube.stl
G1 F600 X2.4 Y0.0 E-94.72792
G1 X0.0 Y0.0 E0.11974
G1 X0.0 Y9.4 E0.46896
G1 X2.4 Y9.4 E0.11974
G0 F7500 X1.8 Y-22.966
;TYPE:WALL-INNER
G1 F600 X1.8 Y0.6 E0.4091
G1 X0.6 Y0.6 E0.05987
G1 X0.6 Y8.8 E0.4091
G1 X1.8 Y8.8 E0.05987
G0 F7500 X1.2 Y-22.966
G1 F600 X1.2 Y1.2 E0.34923
G0 F7500 X1.21 Y1.2
G1 F2700 E14.05462
;MESH:NONMESH
G0 F300 X1.21 Y1.2
G0 F7500 X1.72 Y8.72
G1 F2700 E19.05462
G0 F7500 X2.4 Y9.4
;Z belt triggering
G1 F3000 X0 Y0
G1 F3000 X30 Y0
G1 F3000 X30 Y-120
G1 F3000 X10 Y-120
G1 F3000 X11 Y-120
G1 F3000 X15 Y-120
G1 F3000 X20 Y-120
G1 F3000 X30 Y-120
G1 F3000 X30 Y0
G1 F3000 X0 Y0
M808

New Bed Leveling (7 replies)

MARKYU — Mon, 04 Jul 2022 02:26:56 -0400

I just made this distance sensor which can be used on bed leveling and adjust first layer (:P)

516115055.jpg

details:
[github.com]

Marlin and OctoPrint sharing the same display (1 reply)

yet-another-average-joe — Mon, 27 Jun 2022 06:27:38 -0400

Hi,
I'm developping a "thing" that allows the Marlin and OctoPrint user to share the same display for OctoPrint and Marlin. Unfortunately, the Raspberry Pi has no slave mode (why ??????), and Marlin acts as a master when communicating whith a display (RepRapDiscount Full Graphic Smart Controller, etc.).
As a workaround, I created a shield that is seen as a slave by Marlin, and as a slave by the RasPi.

[github.com]
[github.com]
[github.com]

A STM32 catches Marlin UI frames, converts them into a bitmap, and sends a signal to the Pi. Then, the Pi reads this bitmap and displays it.

The OctoPrint plugin installs a low level "driver" that directly writes to the RasPi VRAM, creating an overlay window showing Marlin UI.
This overlay window is customizable from a OctoPrint plugin (size, colors, transparency).
There's a demo mode that does not require the custom hat (no electronics needed) : just a button between a GPIO pin and GND.

The custom Pi hat is a huge limitation because very few people (if any) will make a PCB and populate it !

I'm now thinking of something else. Marlin uses a custom u8glib library. So I'm thinking of an additionnal u8glib mode that would act as a SPI slave, and give its bitmaps to the RasPi, without the need of any electronics.

But is this doable ? Could Marlin communicate over SPI asynchroneously ? I fear some timing issues !

Is there some Marlin devs on reprap.org ?
Where could I communicate ? (of course not on Marlin Git, it is for issues and FQs, not for development)
Maybe Discord, but I'm unable to speek english fluently : not an option

3D Printer Tester Survery (no replies)

efeerdogmus0 — Wed, 18 May 2022 12:08:28 -0400

Hello, we have been developing a 3D printer prototype for a while. We prepared a 5-minute survey to learn what you want to add to the project and to deliver our prototypes to test users. It is extremely important that our friends, who are especially 3D printer users, support us with their ideas. [forms.gle]