Add draft laser cutter page with training page from the wiki

Author: nomis

syllabuses/Workshop/Laser Cutter/syllabus.md

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+# Bandsaw
+
+## Safety
+
+### Materials
+
+* Can catch fire
+* Can produce toxic fumes
+
+### Laser
+
+* High-power laser can cause burns or severe eye damage
+* Laser compartment must remain closed
+
+### Electricity
+
+* Mains 240V inside control panel
+* High voltages (2kV) in control panel and around laser tube
+
+### Lid
+
+* Do not operate if the lid doesn't stay open on its own
+* Users may hit their head on the lid when arranging materials
+
+## Startup checks
+
+### Enclosure is intact and all access panels are closed
+
+* Check the laser enclosure and viewing windows aren't damaged
+* Check all access panels are locked closed
+
+## Usage
+
+### Starting of the machine
+
+* Check there are no obstacles for when the laser cutter moves to the home position
+* Tap your tag on the access control
+* Ensure the external extractor fan is running (TODO: audible noise but no easy
+  way to confirm this and it's shared by multiple tools)
+* Release the E-Stop
+* Power on the machine (green button/key switch)
+* Ensure the internal air assist/pump is running (unless cutting paper)
+* Ensure the chiller is running (Big Laser Cutter only, TODO: how to check this)
+
+### Stopping of the machine
+
+* Return the laser to the home position ("Datum" button)
+* Power off the machine (red button/key switch)
+* The E-stop should be pressed in an emergency, this will cut power to the laser
+* Remember to log out if leaving the machine unattended for any period of time
+
+### Hazards
+
+* The laser can cause burns and blindness
+* The laser compartment must remain closed, and the lid-sensor must not be bypassed
+* The laser cutter contains high voltages (2kV, 240V) and users must keep clear
+  of the wiring in the laser compartment and control panel
+* There is a risk of fire with **any** material and the laser cutter must not be
+  left unattended, even for a minute (there is pause button and an emergency stop)
+
+### General
+
+* Know how to power-up the cutter and checking that the extraction, water
+  cooling and air assist are working
+* Know which materials may be cut safely, that some plastics may produce
+  chlorine or cyanide gases, and that some materials may catch fire more easily
+  than others
+* Know that the cutter works best with coolant temperature between 10-20C,
+  should not usually be used above 25C, and how to check the temperature
+* Basic use of the software
+* Setting appropriate power/speeds for different materials
+* Using the cutter's control panel to move the head/carriage
+* Positioning the workpiece and setting Z (vertical) alignment
+* Focusing the laser (Big Laser Cutter only)
+* Using the test button before cutting
+
+### Materials
+
+* Acceptable materials include:
+  * Acrylic
+  * Laser safe plywood
+  * Laser safe silicone rubber
+  * Laser safe vinyl
+  * Paper/cardboard
+  * Glass (engraving only)
+  * PLA (short cuts only)
+* Unacceptable materials include:
+  * Metal (engraving only, preparation required)
+* Consult the complete list of materials on the wiki page
+* Ask a maintainer if you are unsure of suitability
+
+### Post Cutting/Engraving
+
+* Once you have finished your work, turn off the laser cutter, log out of the access control, and clean up the bed
+* Leave the machine in the state you would expect to find it
+
+## Maintenance
+
+### Basic
+
+#### Removing dirt and debris
+
+* Remove large debris by hand
+* Use vacuum cleaner to remove small debris
+
+#### Checking alignment of visible guide laser
+
+1. Put scrap material in the laser cutter and focus
+2. Close the lid
+3. Briefly press and release the "Laser" button to fire the laser
+4. Open the lid and align the guide laser with the mark on the material
+
+### Intermediate
+
+* Cleaning mirrors and lens
+* Checking alignment of laser
+* Minor corrections of alignment (mirrors 2 and 3 only)
+
+### Advanced
+
+* Removal of bed for extended cleaning
+* Full alignment
+* Replacement of laser tube