Monthly Archives: April 2014

Even More Equipment

A generous donor has just presented to us a Shopsmith.  If you are not familiar with the Shopsmith, let me explain.  The Shopsmith is a multi tool: Wood Lathe, Drill Press, Horizontal Boring machine, Table Saw, Disk Sander, Drum Sander, Band Saw, Jointer, With additional attachments it can also become a belt sander, a planer, and a shaper.  It is very versitile.

6 minutes left



Work in progress: Unser kleiner Touch-Pi hat seine ersten Teilaufgaben in der Space-Steuerung schon bekommen, hier die von der ÖPNV-Website runtergeparsten Abfahrtszeiten der nächsten Bahnen (Die kvg bietet keinerlei vernünftige API an, denn dann könnten die Kunden ja gucken, wann sie die nächste Transportdienstleistung kaufen können - bewahre! Die haben da irgendein proprietäres System [geleast?], wo sie so nette Sachen wie im Bild - sowas hängt dann in offizieller Version im Auebad - jeweils einzeln teuer latzen müssen)

Ausserdem muss ich bei der Gelegenheit mal über deren grauenhafte Site ranten, wo die Fahrplansuche in einem Winz-scroll-dich-tot-Frame läuft! Das ist so 1995!

6 minutes left



Work in progress: Unser kleiner Touch-Pi hat seine ersten Teilaufgaben in der Space-Steuerung schon bekommen, hier die von der ÖPNV-Website runtergeparsten Abfahrtszeiten der nächsten Bahnen (Die kvg bietet keinerlei vernünftige API an, denn dann könnten die Kunden ja gucken, wann sie die nächste Transportdienstleistung kaufen können - bewahre! Die haben da irgendein proprietäres System [geleast?], wo sie so nette Sachen wie im Bild - sowas hängt dann in offizieller Version im Auebad - jeweils einzeln teuer latzen müssen)

Ausserdem muss ich bei der Gelegenheit mal über deren grauenhafte Site ranten, wo die Fahrplansuche in einem Winz-scroll-dich-tot-Frame läuft! Das ist so 1995!

Treffen: Cypherpunks

Mit dem Treffen der Cypherpunks bietet der shackspace einen regelmäßigen Termin für alle Crypto-, Privacy- und Datenschutzinteressierten.
Das Treffen findet jeden zweiten Sonntag ab 19 Uhr statt.

Teilweise finden zu einzelnen Treffen besondere Vorträge und/oder Workshops statt. Details hierzu könnt ihr der Wikiseite des Cypherpunk Projekts im shackspace Wiki entnehmen.

Schaut rein!

Weitere Informationen:

Zum Event:
Eintritt frei! (Spenden an shack e.V. sind gerne gesehen)
Datum: jeden zweiten Sonntag ab 19 Uhr
Anfahrt: U4/U9 Haltestelle “Im Degen”, Ulmer Straße 255, Stuttgart Wangen (gegenüber Kulturhaus Arena)

Photo: CC-BY Cory Doctorow

Treffen: Cypherpunks

Treffen: Python Workshop

Der Python Workshop im shackspace trifft sich bereits seit geraumer Zeit regelmäßig.
Das Treffen findet alle zwei Wochen Freitags ab 19 Uhr statt.

Der Workshop richtet sich an alle Erfahrungsstufen. Sowohl für blutige Anfänger als auch gesottene Veteranen und Umsteiger ist etwas dabei.

Schaut rein!

Weitere Informationen:

Zum Event:
Eintritt frei! (Spenden an shack e.V. sind gerne gesehen)
Datum: jeden zweiten Freitag ab 19 Uhr
Anfahrt: U4/U9 Haltestelle “Im Degen”, Ulmer Straße 255, Stuttgart Wangen (gegenüber Kulturhaus Arena)

Treffen: Python Workshop

Your Hackspace Needs You!

On 22nd May at 8pm in the Studio will be the Nottingham Hackspace Annual General Meeting!

This gathering of members is by far the most exciting, interesting, awe-inspiring and enlightening couple of hours in the Hackspace calendar!

Ok, it’s actually pretty much like a member’s meeting, but it is something that we have to do to ensure the Hackspace can continue to run, and we need you attend.  In order to complete the year properly and file our accounts, the meeting must be quorate, which means at least 52 members need to be there.

So please make every effort to come to the meeting, or register a proxy vote with the trustees by emailing them at trustees@nottinghack.org.uk.

At the AGM, we will start the elections for our new trustees, so if you are interested in becoming a trustee, please email trustees@nottinghack.org.uk by Sunday 4th May.  You must include your full legal name, a photograph of yourself and a paragraph about why you want to be a trustee.

You can see examples from our current trustees on the Board Wiki Page.

From next year, the trustees will take on more responsibility for the strategy of the space – where are we going in the next few years, and how are we going to get there. Additionally, they will have ultimate responsibility for all the teams, although they will not necessarily be involved in the day to day running.

We hope to see you all at the AGM!

Nova Labs Laser Cutter “Mongo” Undergoes Repair

Our beloved laser cutter (affectionately called Mongo due to its immense size) has been a steady workhorse for completing member projects at Nova Labs. It is really a model Charley, named after an actual hurricane like all of Hurricane Lasers’ models.

One day recently, Mongo began tracing the outline that should have been cut instead of actually cutting. No smoke, no cutting. The red spotting LED was visible, but that really isn’t useful because it doesn’t cut anything.

We began troubleshooting with the great folks at Hurricane. There are evidently 3 different power supplies within Mongo, and the one dedicated to powering the 100 WATT tube wasn’t operational – no LEDs, no fan running. We removed the power supply and took it apart, finding a crispy thermistor.

Power supply with toasted thermistor.

Burnt components are always a bad thing. Hurricane promptly sent us a replacement, so we desoldered the leads and installed a new one.

Nova Labs Laser Cutter “Mongo” Undergoes Repair

Putting power supply back together after soldering in new thermistor. Hand model is Leon.

Mongo worked briefly, but stopped lasing after a few minutes. We suspected that more internal components in the power supply were damaged than were apparent from a visual inspection. Hurricane shipped us a new power supply, while we shipped this one back for repair. Once the new one was installed, we could see the appropriate LEDs lit in operation. Seeing the red LED and observing the fan running was the first step. Turning on the water chiller (it cools the laser tube while in operation) triggers a flow sensor and the yellow LED.

Nova Labs Laser Cutter “Mongo” Undergoes Repair

Laser power supply with top red LED lit (powered on) and bottom yellow LED (Chiller operation) lit.

The ultimate test was a cutting job. It was continuous enough that we could capture the green LED, which lights up when the laser is actually cutting.

Nova Labs Laser Cutter “Mongo” Undergoes Repair

In addition to power and chiller status LEDs, this shows the bottom green (Laser) LED, which is lit when the laser fires.

During the cutting, we saw listless airflow in the chamber. This led to a filter-cleaning exercise and later to mirror focus calibration and cleaning. Since cleaning the mirrors, we’ve been able to back down the power settings to almost HALF of what they were – the steady accumulation of slight amounts of deposited soot cut back the effective power.

Mongo was briefly not working the next day, so of course we wondered if we needed to start all over. It turns out the safety switch for detecting the state of the cabinet door is a hall-effect (magnetic) switch. It sometimes gets out of alignment, so was adjusted. We will be replacing this with a standard switch soon, so we can better tell when it contacts.

Back to work!