=====Tangential Knife Operations=====

====Step 1 - Swap out sacrificial boards===

Swap the sacrificial MDF Board used with the spindle for the sacrificial Polystyrene Board used with the knife.  

====Step 2 - Remove AXYZ Spindle Unit====  

  - Move machine head to a position that is convenient for making changeover of the different tools.  
  - remove the vacuum hose as safety collar. 
  - With an allen Key loosen the 5x Hex Studs securing the Spindle mounting plate to the machine head mounting plate. 
  - Disconnect control cables connecting spindle to the machine head by turning the aviation connector plug sleeve anticlockwise. 
  - Support the weight of the spindle while simultaneously completely removing the hex studs. 
  - Now place spindle unit safely to one side.   

====Step 3 - Install Multicam Tangential Knife Works==== 

  - align the holes on the Knife Works mounting plate with the holes on the machine head mounting and insert the 4x hex studs and tighten. 
    - Use the lowest holes available
    - **Do not use the cross-threaded hole 2nd from the bottom on the left-hand side**

====Step 3 - Install Multicam Tangential Knife Works  - Continued ====  
    - When tightening bolts
        - support the knife with another pair of hands - or your gut hand
        - get the top left and bottom right screws 3/4 threaded.
        - make sure the knife plate is **flat** against the machine head mounting plate.
        - Thread the bottom left, then top right screws 3/4 threaded
        - Finger tighten all screws in the same order
        - Use the 3mm Allen Key to fully tighten.
 ====Step 3 - Install Multicam Tangential Knife Works  - Continued 2 ====  

  - Connect the control cable via the aviation plug.
  - Connect the air supply hose;
    - push the socket down
    - jam the hose in - the socket has teeth that will grip the hose.

 ====Step 3 - Install Multicam Tangential Knife Works  - Continued 3 ====   
  - Add 2 drops of machine oil to oil nipple (2 drops to be added every 2 hours of operation)
  - Execute function F58 - Changes A2MC from Spindle control to Tangential Knife control setting. At this point the machine will reboot
  - Allow the machine to home the knife on the X&Y axis

====Step 4 - Fit Knife Blade====

<WRAP center round important 60%> **WARNING - KNIVES ARE EXTREMELY SHARP** 

** Move Machine head to middle of table and place scrap foam on knife as guard whenever knife is not in use. ** </WRAP>

==== ====

<WRAP center round info 60%>**Extreme care should also be exercised when handling Knife blades as they are expensive and fragile and are likely to break if dropped.** 


Only remove them from their packaging over the sacrificial board  </WRAP>
==== ====

====Step 4 - Fit Knife Blade - Continued====
-  Wear protective gloves whenever handling the knife. 
- Select specific knife blade appropriate for your cutting requirements.
- The knife cutting length should be as close as possible to the thickness of material
- Again, position Machine head over sacrificial board in a convenient position for installing the required knife blade. 
- Execute Function F42 to 90 deg to expose the knife retention grub screw and remove grub screw with 3mm Allen Key. 
- Insert Knife blade with into holder with keyway oriented to the grub screw hole. Screw in grub screw and tighten. 
==== ====
 <WRAP center round important 60%> **MAKE SURE THE KNIFE IS FITTED STRAIGHT** ** 


The grub screw should only contact the **flat area** of the knife blade hilt ** </WRAP>

====Step 5 - Set Knife Length====

The machine head needs to be calibrated to the correct Z axis value so that the knife tip's highest point of travel is level with the upper surface of the sacrificial board. This requires the operator calibrate the  z axis manually ( or by eye) while the knife is reticulating.         
  - Now move Machine head over sacrificial board.
==== ==== 
<WRAP center round important 60%>** **WARNING** 

the next Step Starts the Knife**</WRAP>

====Step 5 - Set Knife Length - continued ====
- Execute Function F24 - Set Knife Length. This will start the knife's reticulating movement. 
  - Using the Z axis jog buttons (and =/- buttons to adjust jog speed -fast, medium or slow) to lower the tip of the blade slightly into the sacrificial board. 
  - When you have adjusted the Z axis to the correct depth the tip should be just under ( by the smallest fraction possible) under the surface of the sacrificial board at the highest point of travel.
  - When you are happy with the calibration of the Z axis select enter. 
  - A2MC will now ask if you want to Set Knife? Perform a visual check of whether the knife is running parallel to the X axis. If the knife is aligned on the X axis Select **no**. If the Blade is not aligned select **Yes** and perform the [[facilities:fablab:equipment-cots:multicam_m-2412:set_knife|Set Knife]] procedure.  
  
 
====Other Knife Operations====
  * [[facilities:fablab:equipment-cots:multicam_m-2412:oscillating_knife||Adjust over/under cut]]
  * [[facilities:fablab:equipment-cots:multicam_m-2412:oscillating_knife#set_knife]]