LaserCutter

	Attention: Dangerous machine ahead
	Use only at your own risk, and after proper instruction!

	Attention: Maintenance
	Machine is currently not working (ETA unknown)

   

LaserCutter Status: broken [box doku]
Description	A Laser to cut stuff
Owner	MuMaLab

Before starting, please read the Safety Guidelines

Current Status

• Undergoing major maintenance and upgrades
• Lens: 50mm

Features

• Big build area (Table Size: 1240 x 1000 mm / max Cutting Size: 1140 x 800 mm)
• Pilot laser for dry run and positioning
• 90W CO2, wavelength ≈ 10 microns

Components / Parts

• Trocen AWC7824 Controller Laser Engraving Cutting Controller
• Reci 90W CO2 Laser Tube
• DY13 100W Laser PSU
• OpenLaserSafety v1.0
• Exhaust System including filters

Technical Details & Manuals

These resources are not needed by users.

• LaserCutter/Technical Details
• LaserCutter/Calibration

Safety System panel

Code on github

The Safety System runs on an Arduino, checks for

• Water flow (Right before the laser tube, arduino counting pulses)
• Chiller temp (measured before and after laser tube)
• Exhaust system (differetial pressure; digital)
• water leak under the chiller and in connection pipe on both sides (digital) (--> Heiko)

• lid closed (reed contacts, directly connected to the controller --> Peter)

--> Adrian, Heiko (Code review by Peter?)

Maybe later:

• Compressor running
• power consumption (???)
• ...

Sensors

Waterleak

Schematic

Consumables

Our laser tube:

• Reci W3 80W Long life CO2

Mirrors:

• use copper-backed or molybdenum-backed mirrors. Do not use silicone backed mirrors.

Finance

When we have this thing running, we maybe need to think how we can get the costs back in. A 100W laser tube costs around 1200€ and has a lifetime of 6000-10000h.

As discussed on the 20150315 Plenum (and again in 20161009 Plenum), we will start with the following structure:

• 2€ per 10min for members, 3€ for HuS, 4€ for non-members, 5+€ for "commercial" use

Logging

We installed a data logger to keep track of the usage hours. The logger tracks the time the air assist is on, which is just about the runtime the laser controller displays for a job. We want to use this to track the working hours of the laser tube, but if you want to check how long your laser cutting jobs took, feel free to checkt that here as well:

• Log overview
• last 100 jobs (JSON)
• Daily summaries (JSON)

Inspiration

Some connectors: - https://www.flickr.com/photos/satiredun/15868308421/sizes/o/ 'PCB' out of steel: - https://www.youtube.com/watch?v=OtZQoIheYcc

Additional Parts

• Gas spring, Price 24€, Manufacturer Shockex, Part number 1181202100, Amazon [5], Force: 320 N, Outer diameter 1: 18 mm, outer diameter 2: 8 mm, Stroke length: 187 mm, Lenght: 468 mm

Sources

• [1]: http://support.epiloglaser.com/article/8205/42827/
• [2]: http://www.lasersaur.com/
• [3]: http://www.lightobject.com/AWC608-Commercial-DSP-CO2-Laser-Engraving-Cutter-Controller-P321.aspx
• [4]: http://www.gasfedershop.de/gasfeder_berechnung/
• [5]: http://www.amazon.de/gp/product/B008MPR8W8
• [6]: https://www.youtube.com/watch?v=Wpsi3tKJGMo