MechArtLab Infrastructure

Electronic Tools

Hardware Tools

2D Printers

HP LaserJet

Our trusty 2D printing workhorse 🖨️

• Location MechArtLab window sill
• Model HP LaserJet 3015P
• Purpose Printing two-dimensional objects in black & white
• URL ipp://npi0e1641.local/ (IPP) or socket://npi0e1641.local:9100 (JetDirect)
• Toner HP 55A (CE255A)

Stikka Printa

Stikka Printa: "Kleben und kleben lassen" ✨

• Location Table near DigiGes entrance
• Model Brother QL550 etc, ESP32
• Purpose Printing sticky labels in black & white
• Features Label & sticker printing, generating QR code labels etc
• Options Transparent or non-transparent [white | pink] sticker rolls of 62mm width
• URL https://stikka-factory.github.io/stikka-mqtt * accessible via IPv6 only

Stikka Printa: Upskirt shot 😍

Caveats

• The paper labels don't come off easily. After peeling off parts of it, you might have to use a solvent or duct tape to completely remove the remains.

Changing supplies

• Open the cover
• Pull orange lever up
• Remove previous roll
• Insert new roll
• Feed new roll through front feeder
• Push orange lever back down
• Close cover

Debugging

• The software sometimes chokes on large, high-frequency print jobs, and no more stikkas are coming through. In that case, the easiest is to briefly power-cycle the Raspberry controlling Stikka Printa.
• If Stikka Printa isn't accessible on the known URL, the Raspberry controlling it might not be turned on, could have gotten a new IP from DHCP, or init5.ch DNS could be broken. Start by ensuring both the Raspberry and Brother QL550 are turned on, and scanning the BW network range for port 8980 using something like: nmap -sS -p 8980 --open -oG - 10.168.0.0/24. Once recovered, please print a new QR label in case the URL has changed, and update the link in this Wiki 🙏

Software

• If you'd like to add or improve a feature, the Stikka Printa source code can be found on GitHub
• To access Stikka Printa via SSH, use l: dusjagr p: clubmate42

3D Printers Tools and Instructions

Best to directly connect to OctoPrint: http://octopi.local/ or install Cura on your laptop and use the SD cards reader.

Ender3	Ender3 v2	MicroDelta	Ultimaker

Bed leveling for Ender 3 (& V2)

Check this movie: https://www.youtube.com/watch?v=4JSa_r8xgX8

Other resources

Currently a MicroDelta printer is installed, use the page linked to get started.

Design: Download Sketchup from http://www.sketchup.com/ => Design => Export .STL

Slice: Download Cura from http://software.ultimaker.com/ => Load .STL => Prepare => Write .GCODE to SD card

Print: Insert SD card into Ultimaker => Push, Scroll to Card => Select .GCODE => Push

Share: Upload model and .STL (but not .GCODE) to http://thingiverse.com/

First time? Ask @tamberg.

Laser Cutters

There's a public MacBook with LightBurn preinstalled and configured for our laser cutter armada.

Creality Falcon A1 Pro

Specifications

• 20W blue diode laser
• 2W infrared module for glass and metal, at 455±5 nm wavelength
• Engraving area: 358 × 268mm
• Max. Working Speed: 600mm/s
• Cuts up to 10mm basswood and 8mm black acrylic, 0.04mm stainless sheet
• For full specs, see vendor website

General usage

• Ensure the compressor in the wood workshop is turned on ☝️
• Place the exhaust hose through the window
• Ensure the devices tubular lock is in the unlocked position
• Ensure power switch is in in the ON position
• Unlock the Emergency Stop by turning the knob
• Connect LightBurn via USB-C and laser away ⚡

Known quirks

• The devices touch display turns off after a few minutes. Just touch it to make it shine again
• Though the laser cutter comes with USB-C ports, using a USB-C to USB-C cable has been problematic
• Using USB-C to USB-A cable with a USB-A-to-USB-C adapter is known to work 🫠

Software

• To operate the Falcon A1 Pro using LightBurn on your own device, see their Wiki
• For improved settings, use Aaron's magic Girlen Core config ✨

ORTUR Laser Master 2

The attached computer has already LightBurn installed, it's the best software to use many different laser machines: https://www.youtube.com/watch?v=YLhbvwq_EDc

You find drivers and firmware updates here: https://ortur.tech/olm2/

Hackaday wrote a few articles on mods and improvements, aswell as a nice discussion on open source hardware around the ORTUR company: https://hackaday.com/tag/ortur/

Parts'n'Stuff / Private Storage

SMD collection

See a list of all our parts: https://sgmkcloud.ocloud.de/index.php/s/GmFmeziyQkk9cCM

Or for nextcloud users, editable: https://sgmkcloud.ocloud.de/index.php/f/43592

Lab tools / Wetware

PCB Etching

Instructions on how to use the PCB etching facility can be found under PCB Etching.

Instructions for Mask design and print for custom PCBs.

Oven for Reflow and PDMS

There is a temperature sensor in the oven connected to an arduino that can be read through serial terminal. At the moment the sensor is mounted at the wrong position and shows around 40° less than the real temperature in the moddle of the oven. more about the code and connection of the temperature sensor is documented.

Instructions for reflow soldering.

Instructions for PDMS bioelectronix.

Lasercutter for PCB stencils

http://hardwarebreakout.com/2013/03/diy-laser-cutter-for-pcb-stencils

Library

There's a Library in the OpenLab. Librarything.de login is 'SGMK' combined with our beloved password...

Comic on soldering File:FullSolderComic EN.pdf PDF booklet. by Andie Nordgren link title

Office / Public Station

Chill out / Coffee

Entertainment

Toilet DJ

Plays random WAV files from SD card upon poweron, with randomness being a bit wonky due to seeding from a floating analog pin.

Currently features about 100 tunes, feel free to add your own favourites! *Note the file format requirements below.

Amplifier inputs

The amplifier is located on top of the flushing tank, and has three inputs:

• Tape ToiletDJ
• Tuner Bluetooth dongle
• CD unassigned

System specs

• Amplifier Dynavox CS-PA 1
• Speakers Grundig Kugelbox 510
• System Arduino Uno, Adafruit Wave Shield v1.1
• Storage 32GB SD card, FAT (MS-DOS) filesystem
• WAV format Mono, 22kHz, 16-bit sampling rate
• Repo GitHub

File conversion

To convert a sound file into the required format, you can use tools like ffmpeg as follows:

ffmpeg -i input.mp3 -ac 1 -ar 22050 -sample_fmt s16 output.wav