Added some 3D printer photos and text. Added OctoTray page.

input/projects/3d-printing/fabrikator-mini.md

 
 TODO photos
 
-### Power Supply Replacement
+## Spool mount
+
+One of the first problems I ran into was mounting the filament spool.
+I found a [ready-made solution on Thingiverse](https://www.thingiverse.com/thing:1057433), which I was using for a while, until I switched to a different brand whose spool did no longer fit.
+Because of that, [I designed my own holder](https://www.thingiverse.com/thing:1427890).
+
+<!--%
+lightgallery([
+    [ "img/fabmin_spool_1.jpg", "My spool holder" ],
+    [ "img/fabmin_spool_2.png", "Design of my spool holder" ],
+    [ "img/fabmin_spool_3.jpg", "Spool holder on printer" ],
+    [ "img/fabmin_spool_4.jpg", "Original I modeled mine after" ]
+])
+%-->
+
+## Feet
+
+With a heavy filament spool mounted on the backside of the printer, it was no longer standing upright.
+Because of that, bigger feet were needed.
+Luckily, there was also [something available already](https://www.thingiverse.com/thing:1396469).
+I just had to [cut a bit off in OpenSCAD]() to get matching front feet.
+
+TODO photos
+
+## Power Supply Replacement
 
 I did not really trust the stock power supply and I also needed more power available for further modifications.
 So one of the first steps was replacing the power supply.
 
 TODO photos
 
-### Heatbed Replacement
+## Heatbed Replacement
 
 One of the first problems I ran into were with the printing surface.
 In its stock configuration, the Fabrikator Mini has an acrylic sheet with blue painters masking tape on top as its print surface.
 This works, but I was not entirely happy with the adhesion of PLA and the need to frequently replace the tape or even use stuff like glue or hairspray to keep the prints firmly in place.
 So I did a search on eBay, and found a vendor offering replacement aluminum heatbeds specifically for the Fabrikator Mini. They were made `tinyfab.xyz`, they now have their own [webshop listing the heatbed](https://www.tinyfab.xyz/product-page/mini-fabrikator-v1-1-5-alu-heatbed). Unfortunately, it no longer seems to be available.
-I've also bough a 80mm wide kapton tape roll and have been using this as a print surface on the aluminum heatbed ever since, only replacing it when needed after I damaged it on print removal.
+I've also bought a 80mm wide kapton tape roll and have been using this as a print surface on the aluminum heatbed ever since, only replacing it when needed after I damaged it on print removal.
 Depending on how you solder the power supply wires to the heatbed, it can either run in a 15W or a 60W configuration.
 I found the 15W setting to be painfully slow in reaching usable temperatures, so I have been using the 60W variant basically from the beginning.
 Of course, as mentioned before, I used a beefier power supply for this that can handle the load. I did not however replace the DC connector on the printer or use a MOSFET or anything special. Both the connector and the (in stock unused) heatbed MOSFET seem to be able to handle the load in my configuration, even for very long prints.
 
 TODO photos
 
-### Mesh Bed Leveling
+## Custom Firmware
+
+Luckily the main board already has a MOSFET for the heated print bed that was unused in the original setup.
+But of course, to enable support for the heatbed, I had to compile my own custom Marlin firmware.
+This is also recommended for safety reasons, as the chinese manufacturers often leave out the temperature runaway shutoff in their firmware config.
+
+
+
+I also wrote [this blog post](2016_03_24_marlin_fabrikator_mini.html) about my Marlin modifications.
+
+## Mesh Bed Leveling
 
 Even though it probably shouldn't be necessary for such a small printbed, I did still have some first layer adhesion issues with the aluminum printbed. Especially one corner seems to be a bit bent. So I enabled Mesh Bed Leveling in my Marlin Firwmare (see below) and also wrote a little [GUI Tool to assist the leveling process](https://git.xythobuz.de/thomas/Bed-Leveling-Utility). It is also on [GitHub](https://github.com/xythobuz/Bed-Leveling-Utility).
 
 
 And this is really just an example! Do not just copy these values to your printer, they will differ of course.
 
-### Temperature Issues
+## Temperature Issues
 
 With all of this added load, and even in its stock configuration, the Fabrikator Mini electronics and stepper motors run very hot.
 So hot that I did not feel comfortable leaving it like this.
  * [Y-Axis motor fan](https://www.thingiverse.com/thing:1454399)
  * [Z-Axis motor fan](https://www.thingiverse.com/thing:1531538)
 
-TODO photos
+<!--%
+lightgallery([
+    [ "img/fabmin_yfan_1.jpg", "Y-axis fan" ],
+    [ "img/fabmin_yfan_2.jpg", "Y-axis fan" ],
+    [ "img/fabmin_yfan_3.jpg", "Y-axis fan" ],
+    [ "img/fabmin_yfan_4.jpg", "Y-axis fan" ],
+    [ "img/fabmin_yfan_5.jpg", "Y-axis fan" ],
+    [ "img/fabmin_zfan_1.jpg", "Z-axis fan" ]
+])
+%-->
 
-### Z-Axis Noise and Wobble
+## Z-Axis Noise and Wobble
 
 Right from the start I noticed a very painful high-pitched squealing noise coming from the Z-axis whenever it moved.
 Even with lubrication I was not able to resolve this.
 
 TODO photo
 
-### Part Cooling Fan
+## Part Cooling Fan
 
 Even though print results were already pretty good, there was still some sagging noticeable on sections with long bridges, and also some stringing issues.
 Of course, the only real solution for these issues with PLA is a part cooling fan.
 
 TODO wiring hotend heatbed part-fan hotend-fan
 
-### Full Graphics Smart LCD
+## Full Graphics Smart LCD
 
 To be able to properly control the printer and print from the SD Card (before I was using OctoPrint), it is very useful to install some kind of display for status informations and changing settings on-the-fly.
-One of the most common solutions there is the [Full Graphics Smart Controller](https://reprap.org/wiki/RepRapDiscount_Full_Graphic_Smart_Controller) that is available as cheap chinese clones easily.
+One of the most common solutions out there is the [Full Graphics Smart Controller](https://reprap.org/wiki/RepRapDiscount_Full_Graphic_Smart_Controller) that is available as cheap chinese clones easily.
 As there was no good mounting solution available that could also be printed with the Fabrikator Mini itself, I designed [these small mounting brackets](https://www.thingiverse.com/thing:1441146) to hang the display from the front acrylic plate cutout of the machine.
 The controller board already has connectors available for the LCD. Just take care that the pinout matches, if I remember correctly I had to switch the connectors around.
 
-TODO photo
+<!--%
+lightgallery([
+    [ "img/fabmin_disp_1.jpg", "Full Graphics Smart LCD on Fabrikator Mini" ],
+    [ "img/fabmin_disp_2.jpg", "Mounting brackets, far view" ],
+    [ "img/fabmin_disp_3.jpg", "Mounting brackets, near view" ]
+])
+%-->
 
-### Raspberry Pi Zero
+## Raspberry Pi Zero
 
 Of course, to really properly utilize a 3D printer, you need OctoPrint!
 This is normally used in conjunction with a Raspberry Pi connected to the printer.
 As it is also printing very slowly, there's really not much load on the Pi itself, and I never had any problems printing from it.
 I do have to admit however, that the OctoPrint webinterface sometimes takes very long to load with this setup.
 But once it's there it works fine.
-I'm even doing all my slicing for the Fabrikator Mini on the Pi Zero.
+I was even doing all my slicing for the Fabrikator Mini on the Pi Zero for a while.
 
-TODO describe power supply situation for Pi, with modded USB cable
+To power the Pi, I'm using a small 5V step down converter that's connected to the 12V input of the printer.
+As the printer board is also connected to 12V and has its own 5V regulator, I decided to cut the +5V rail in the USB cable connecting the printer and the Pi.
+This way, the display backlight on my printer, as well as the mainboard, are turned off when the power supply relais is turned off.
+With an unmodified cable, the printer LEDs would be lit all the time the Pi is running.
 
 TODO photo
 
-### Relay Board
+## Relay Board
 
 To fully utilize OctoPrint, it also needs a way to control the power supply to the printer.
 One popular method to achieve this is an ATX computer power supply.
 As I already had my power supply, and because the current of the small Fabrikator Mini is not that huge (and it's not switched under full load), I decided to use a simple two-channel relay board connected to the Pi.
 
-TODO more text or link to OctoPrint page section?
+Some more about controlling power supplies from OctoPrint [can be found on this page about my OctoPrint setups](octoprint.html).
 
 TODO photo
 
-### Webcam
+## Webcam
 
 No OctoPrint experience is complete without having a webcam connected to the Raspberry Pi.
 So I bought the, in my view, standard model for 3D printing needs: the Logitech C270.
  * [Logitech C270 Manual Focus System](https://www.thingiverse.com/thing:3081838)
  * [Fabrikator Mini C270 Webcam Holder](https://www.thingiverse.com/thing:1531522)
 
-TODO photos
+<!--%
+lightgallery([
+    [ "img/fabmin_webcam_1.jpg", "My webcam holder" ]
+])
+%-->
 
-### LED-Strip
+## LED-Strip
 
 Depending on where the printer is located, it can be very hard to see any details of the printing process.
 That's why one of the first modifications I did, long before using OctoPrint, consisted of sticking two pieces of white 12V LED-Strips inside to the backside of the front acrylic plate.
 Nowadays I'm using the second relay connected to the Raspberry Pi Zero to switch the light on and off independently from the printer itself.
 This is very convenient to turn the lights off when printing overnight.
 
-### TODO
+## Slicing Profiles
+
+
+
+## Print Results Pictures
 
-* Firmware
-* Feet
-* Spool mount
-* Slicing Profiles
-* Print Results Pictures
 

input/projects/3d-printing/ikea-lack.md

 
 <span class="listdesc">[...back to 3D-Printing overview](3d-printing.html)</span>
 
-**More content coming soon!**
+As is common in the 3D printing community, I have built myself a tower of Ikea Lack tables to store my printers in.
+It has three levels.
+I also included some lights to properly see whats going on, as well as a slide-out table for my small printer.
 
-### Concrete slab for noise and vibration dampening
+## Mounting Hardware
+
+There are many solutions available, now more than back when I built this.
+Nonetheless I decided to design my own simple brackets to mount the feet of one table to the one below it.
+
+For the middle level of the tower, I added some pieces of wood to make more space, so it can fit my large printer comfortably.
+
+<!--%
+lightgallery([
+    [ "img/lack-simple-bracket.png", "Design of my mounting bracket" ]
+])
+%-->
+
+My design files for the mounting bracket [can be found on my Gitea server](https://git.xythobuz.de/thomas/3d-print-designs/src/branch/master/ikea-lack).
+
+## Slide out table
+
+
+
+## Filament holder
+
+
+
+My design files for the filament holder [can be found on my Gitea server](https://git.xythobuz.de/thomas/3d-print-designs/src/branch/master/ikea-lack).
+
+## Concrete slab for noise and vibration dampening
 
 Unfortunately, because the Ikea Lack tables are very lightweight and also hollow, they tend to amplify the sound coming from the 3D printers on them.
 But there is an easy solution to this: vibration dampening by increasing the mass.
 For the surface below the frame, I've used an old cardboard box.
 I've "sealed" the surfaces of the cardboard and the wood pieces with clear flex-o-tape, to avoid the water wicking out of the concrete too fast, and to be able to remove the pieces easily later-on.
 
-<div class="lightgallery">
-    <a href="img/ikea_lack_concrete_1.jpg">
-        <img src="img/ikea_lack_concrete_1_small.jpg" alt="Simple wooden frame">
-    </a>
-    <a href="img/ikea_lack_concrete_2.jpg">
-        <img src="img/ikea_lack_concrete_2_small.jpg" alt="Screwed together in the corners">
-    </a>
-    <a href="img/ikea_lack_concrete_3.jpg">
-        <img src="img/ikea_lack_concrete_3_small.jpg" alt="Added some tape to seal the surface">
-    </a>
-</div>
+<!--%
+lightgallery([
+    [ "img/ikea_lack_concrete_1.jpg", "Simple wooden frame" ],
+    [ "img/ikea_lack_concrete_2.jpg", "Screwed together in the corners" ],
+    [ "img/ikea_lack_concrete_3.jpg", "Added some tape to seal the surface" ]
+])
+%-->
 
 Then I've simply hand-mixed about one half of a 35kg bag of cement/sand mixture with 2l of clear tap-water.
 The resulting sludge can then be filled into the frame.
 
 Also, be careful: avoid contact of the concrete with your skin, it burns after a while!
 
-<div class="lightgallery">
-    <a href="img/ikea_lack_concrete_4.jpg">
-        <img src="img/ikea_lack_concrete_4_small.jpg" alt="Mixing the concrete">
-    </a>
-    <a href="img/ikea_lack_concrete_5.jpg">
-        <img src="img/ikea_lack_concrete_5_small.jpg" alt="Final consistency">
-    </a>
-    <a href="img/ikea_lack_concrete_6.jpg">
-        <img src="img/ikea_lack_concrete_6_small.jpg" alt="Filling the frame">
-    </a>
-    <a href="img/ikea_lack_concrete_7.jpg">
-        <img src="img/ikea_lack_concrete_7_small.jpg" alt="In my first attempt, I just tried to form the surface by hand. It worked, but is not perfect.">
-    </a>
-    <a href="img/ikea_lack_concrete_8.jpg">
-        <img src="img/ikea_lack_concrete_8_small.jpg" alt="Closing it up for 24h">
-    </a>
-    <a href="img/ikea_lack_concrete_9.jpg">
-        <img src="img/ikea_lack_concrete_9_small.jpg" alt="Side-view">
-    </a>
-</div>
+<!--%
+lightgallery([
+    [ "img/ikea_lack_concrete_4.jpg", "Mixing the concrete" ],
+    [ "img/ikea_lack_concrete_5.jpg", "Final consistency" ],
+    [ "img/ikea_lack_concrete_6.jpg", "Filling the frame" ],
+    [ "img/ikea_lack_concrete_7.jpg", "In my first attempt, I just tried to form the surface by hand. It worked, but is not perfect." ],
+    [ "img/ikea_lack_concrete_8.jpg", "Closing it up for 24h" ],
+    [ "img/ikea_lack_concrete_9.jpg", "Side-view" ]
+])
+%-->
 
 After about 24h, the frame can already be removed.
 Because of the large surface area and the low volume of our piece, it get's hard quite quickly.
 And also, we're not using it for large static loads, so we don't have to wait the full 28-days specified by the manufacturer.
 The small parts at the edges where the concrete slightly got under the frame can just be broken off by hand.
 
-<div class="lightgallery">
-    <a href="img/ikea_lack_concrete_10.jpg">
-        <img src="img/ikea_lack_concrete_10_small.jpg" alt="After 24h, one side removed">
-    </a>
-    <a href="img/ikea_lack_concrete_11.jpg">
-        <img src="img/ikea_lack_concrete_11_small.jpg" alt="The small parts at the edge can just be broken off easily by hand">
-    </a>
-    <a href="img/ikea_lack_concrete_12.jpg">
-        <img src="img/ikea_lack_concrete_12_small.jpg" alt="Final result, left view">
-    </a>
-    <a href="img/ikea_lack_concrete_13.jpg">
-        <img src="img/ikea_lack_concrete_13_small.jpg" alt="Final result, right view">
-    </a>
-</div>
+<!--%
+lightgallery([
+    [ "img/ikea_lack_concrete_10.jpg", "After 24h, one side removed" ],
+    [ "img/ikea_lack_concrete_11.jpg", "The small parts at the edge can just be broken off easily by hand" ],
+    [ "img/ikea_lack_concrete_12.jpg", "Final result, right view" ],
+    [ "img/ikea_lack_concrete_13.jpg", "Final result, left view" ]
+])
+%-->
 
 And it works perfectly, the noise of the printer is greatly reduced!
 
 Here are some more photos of the second slab I made.
 
-<div class="lightgallery">
-    <a href="img/ikea_lack_concrete_v2_1.jpg">
-        <img src="img/ikea_lack_concrete_v2_1_small.jpg" alt="">
-    </a>
-    <a href="img/ikea_lack_concrete_v2_2.jpg">
-        <img src="img/ikea_lack_concrete_v2_2_small.jpg" alt="">
-    </a>
-    <a href="img/ikea_lack_concrete_v2_3.jpg">
-        <img src="img/ikea_lack_concrete_v2_3_small.jpg" alt="">
-    </a>
-    <a href="img/ikea_lack_concrete_v2_4.jpg">
-        <img src="img/ikea_lack_concrete_v2_4_small.jpg" alt="">
-    </a>
-    <a href="img/ikea_lack_concrete_v2_5.jpg">
-        <img src="img/ikea_lack_concrete_v2_5_small.jpg" alt="">
-    </a>
-</div>
+<!--%
+lightgallery([
+    [ "img/ikea_lack_concrete_v2_1.jpg", "Frame, with corners for Lack legs" ],
+    [ "img/ikea_lack_concrete_v2_2.jpg", "Mixing the concrete" ],
+    [ "img/ikea_lack_concrete_v2_3.jpg", "More hard mixing work" ],
+    [ "img/ikea_lack_concrete_v2_4.jpg", "Pouring it out" ],
+    [ "img/ikea_lack_concrete_v2_5.jpg", "After vibrating it" ]
+])
+%-->

input/projects/3d-printing/octoprint.md

 
 ### Automatically Connect to Printer
 
-[Bernd Zeimetz has a great writeup on how to auto-connect to the serial port](https://bzed.de/post/2017/11/octoprint_autoconnect_printer/) of your 3D printer. Here is the very brief version of it:
+[Bernd Zeimetz has a great writeup on how to auto-connect to the serial port](https://bzed.de/post/2017/11/octoprint_autoconnect_printer/) of your 3D printer.
+Here is the brief version of it, slightly modified to work with current OctoPrint versions.
 
 Create the script `/home/pi/connect_octoprint.py` with the following contents:
 
 <pre class="sh_python">
-#!/home/pi/OctoPrint/venv/bin/python
+#!/home/pi/oprint/bin/python2
 
 OCTOPRINT_URL = 'http://localhost:5000/api/connection'
-API_KEY = 'AAABBB000YOURAPIKEYHERE000BBBAAA'
+API_KEY = 'YOUR_API_KEY_HERE'
 BAUDRATE = 115200
 
 import requests
 port = sys.argv[1]
 headers = {'X-Api-Key': API_KEY}
 json = {
-  "command": "connect",
-  "port": port,
-  "baudrate": BAUDRATE,
+    "command": "connect",
+    "port": port,
+    "baudrate": BAUDRATE,
 }
 
 r = requests.post(
-        OCTOPRINT_URL,
-        json=json,
-        headers=headers
+    OCTOPRINT_URL,
+    json=json,
+    headers=headers
 )
 
 if (r.status_code == 204):
 
 Make sure to replace the API Key from your OctoPrint user settings page.
 Also change the baudrate if needed.
+Don't forget to make the script executable with `chmod a+x connect_octoprint.py`!
 
 Now create the file `/etc/systemd/system/octoprint_connect@.service` with the following contents:
 
 Find out the USB Vendor and Product ID of the 3D printer serial port:
 
 <pre class="sh_sh">
-lsusb -v | grep -iE ‘(^bus|idvendor|idproduct)’
+lsusb -v | grep -iE '(^bus|idvendor|idproduct)'
 </pre>
 
 Then create the file `/etc/udev/rules.d/3dprinter.rules` and modify its contents with the IDs you got from the previous step:
     KERNEL=="tty*", ATTRS{idVendor}=="0403", ATTRS{idProduct}=="6001", \
         TAG+="systemd", ENV{SYSTEMD_WANTS}="octoprint_connect@%k.service"
 
-That should be it. If it doesn't work, there's some debugging hints in the article linked above.
+That should be it.
+If it doesn't work, there's some debugging hints in the article linked above, like:
+
+<pre class="sh_sh">
+systemctl list-units 'octoprint_connect*'
+journalctl -u octoprint_connect@ttyUSB0.service
+</pre>
 
 ### Physical Power Button
 

input/projects/3d-printing/octotray.md

+title: OctoTray
+description: Linux PyQt tray application to control OctoPrint
+parent: 3d-printing
+position: 35
+comments: true
+github: https://git.xythobuz.de/thomas/OctoTray
+date: 2021-05-08
+---
+
+<span class="listdesc">[...back to 3D-Printing overview](3d-printing.html)</span>
+
+To quickly print new stuff on one of my printers, I am using the OctoPrint integration of PrusaSlicer.
+Unfortunately, it does not allow me to turn on the printers power supply using the Raspberry Pi.
+But it is possible to do that via the OctoPrint REST API.
+Because of that, I wrote a small tool to trigger the power of my printers that lives in the system tray.
+It runs on Linux using the Python Qt5 bindings.
+
+<!--%
+lightgallery([
+    [ "img/octotray_1.png", "Screenshot of first OctoTray version" ]
+])
+%-->
+
+You can find the project [on my Gitea server](https://git.xythobuz.de/thomas/OctoTray) or on [GitHub](https://github.com/xythobuz/OctoTray).

macros.py

     items = "".join(items)
 
     title = "xythobuz.de Blog"
-    link = "%s/blog.html" % BASE_URL
+    link = "%s" % BASE_URL
     feed = "%s/rss.xml" % BASE_URL
     desc = htmlspecialchars("xythobuz Electronics & Software Projects")
     date = email.utils.formatdate()