\section{Set Temperature}
\index{temperature}
Make sure to first read the instructions for using the Printrun software. Connect to the printer as described in the Printrun software section
%%% XXX pageref going to \label not \section
(page \pageref{Printrun}). Set the hot end and print surface for ABS or PLA plastic and turn both on. The temperature settings for ABS should be set at \texttt{230°C} for the hot end and \texttt{85°C} for print surface; for PLA they should be set at \texttt{180°C-185°C} for the hot end and \texttt{60°C} for print surface. If you have not already, make sure the axes end stops are aligned to be triggered when each axis homes. Click the \texttt{Motors Off} button.
\glossary{Idler}{Refers to parts using a bearing (usually a 608ZZ) to add tension in belts or to add pressure against a rolling surface.}
\section{Inserting Filament Into the Extruder}
\index{filament}
\index{hot end}
Once the hot end is heated to the correct temperature you will now need to load the plastic filament into the extruder. Raise both the idler clip and the 2 screws adding tension to release the hinged idler. It can be loosened if necessary.
(Fig. \ref{fig:extruder_idler_release}).
\begin{figure}[hbt]
\centering
\includegraphics[keepaspectratio=true,angle=0,height=0.4\textheight,width=1.0\textwidth]{extruder_idler_release.JPG}
\caption{Extruder idler release}
\label{fig:extruder_idler_release}
\end{figure}
% update feed hole picture.
Gently pull both the idler screws and the plastic clip upwards to release the idler. The idler can be rotated downwards allowing access to the hobbed bolt and filament feed hole(Fig. \ref{fig:extruder_filament_slot}, page \pageref{fig:extruder_filament_slot}). Feed the end of the plastic filament into the filament feed hole
(Fig. \ref{fig:extruder_filament_slot}).
\begin{figure}[htb]
\centering
\includegraphics[keepaspectratio=true,angle=0,height=0.4\textheight,width=1.0\textwidth]{extruder_filament_slot.JPG}
\caption{Extruder filament slot}
\label{fig:extruder_filament_slot}
\end{figure}
Now you can push the filament through the extruder by slowly pushing the filament down into the hot end.

Once the filament extrudes a small amount out of the nozzle raise the idler and slide the two idler bolts and plate back into place. Tighten the two idler bolts if you previously loosened them or if you need additional clearance. Now use the \texttt{Extrude} button in Printrun to test that the extruder is working properly. You may need to extrude 30-60mm to fully prime the hot end.

\section{Home Printer}
Use the home buttons to home the X axis and then the Y axis. Next home the Z axis. When the Z axis is at home the nozzle tip should be sitting right against the glass
(Fig. \ref{fig:nozzle_height}, page \pageref{fig:nozzle_height}). The image to the right, in figure \ref{fig:nozzle_height}, is the correct nozzle height.
\begin{figure}[p]
\centering
\includegraphics[keepaspectratio=true,angle=0,height=0.4\textheight,width=1.0\textwidth]{nozzle_height.jpg}
\caption{Nozzle height}
\label{fig:nozzle_height}
\end{figure}
\begin{figure}[p]
\centering
\includegraphics[keepaspectratio=true,angle=0,height=0.4\textheight,width=1.0\textwidth]{Z_end_stop_trigger.JPG}
\caption{Z end stop trigger}
\label{fig:Z_end_stop_trigger}
\end{figure}
The nozzle should not be pushing down on the print surface. To lower or raise the Z home height adjust the Z end stop trigger. The red end stop trigger is on the far left of the printer mounted on the X-axis motor mount.
(Fig. \ref{fig:Z_end_stop_trigger}, page \pageref{fig:Z_end_stop_trigger}).
The Z home position can be raised by turning the Z end stop trigger clockwise and lowered by turning counter-clockwise. Once you have homed the axes and the hot end and bed have reached the correct temperature it is time to print!

%fix image positioning, images for 5.3 get shoved underneath 5.4
\section{Z Print Height}
Load the \texttt{bedcalib.gco} file.
This file can be found at:
\texttt{http://download.lulzbot.com/TAZ/objects/calibration/bedcalib.gco}

The .gcode pattern should appear in the Printrun G-Code viewer. Press the \texttt{Print} button to begin the print. When the print starts make sure the first layer is not printing too close or too far from the print bed. Note 
Figure \ref{fig:1st_layer_adhesion}, page \pageref{fig:1st_layer_adhesion},
\begin{figure}[hbt]
\centering
\includegraphics[keepaspectratio=true,angle=0,height=0.4\textheight,width=1.0\textwidth]{1st_layer_adhesion.jpg}
\caption{First layer adhesion}
\label{fig:1st_layer_adhesion}
\end{figure}
as an example of a good first layer adhesion. From left to right: very low, low, \emph{perfect,} high, very high. If the first layer is too high or low you can pause the print by pressing the \texttt{Pause} button. Adjust the Z end stop trigger. After making adjustments you can home the axes and press \texttt{Restart} to restart the print.

\section{Remove Part}
After the part is finished printing, the heated bed will automatically cool down to \texttt{0°C}. Once the bed cools you can you pop the finished part off of the printed surface. To remove the printed part, use the clam knife included in your printer kit. Leather gloves are suggested to protect your hands from the clam knife blade. It is also safe practice to not place your hand behind the direction you are pushing the clam knife. Using the side of the clam knife blade pry up one side of the printed part. If your part is large you may need to pry at multiple points to pop the part off of the print surface. When removing parts take caution to not damage the PET film. If the film is cut or ripped it will peel from the glass and need to be replaced. Make sure to reset the heated bed to the correct temperature and allow it to heat up to the needed temperature before starting the next print.

