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--- quickstart:mycnc-quick-start:tangential-knife-setup [2019/07/02 13:51] – ivan
+++ quickstart:mycnc-quick-start:tangential-knife-setup [2020/09/14 09:11] (current) – ivan
@@ Line 1: / Line 1: @@
-=====Tangential Knife Setup=====
+=====Tangential Cutting Setup=====
-The following manual is designed to aid the user with the basic setup of a tangential knife system using myCNC software.
+//From our Video FAQ series: How to turn on tangential cutting?//
+{{youtube>zcrRAU9BJ0E?large}}
+The profile screen description for tangential cutting profile X1366V is available here: [[mycnc:mycnc_setup_examples:tangential_knife|Basic profile for Tangential Knife.]]
+Turning tangential cutting control ON automatically modifies the imported G-code or an imported DXF file:
+  - Positioning blocks (G0-code) is modified. CNC Control software looks at the next motion code, calculates the motion direction angle and adds a C-axis rotation into the G0 code to follow through the next motion.
+  - For Arc interpolation codes (G2, G3), CNC control adds a C-axis rotation to follow the motion direction
+  - For Linear interpolation (G1 code), CNC control calculates an angle between two line segments and modifies the behaviour depending on the angle in question (the three possible outcomes are discussed later in this manual).
 The main settings for the tangential knife/creasing wheel/etc can be found in **Config > Technology > Tangential Knife** on the following screen:
@@ Line 32: / Line 42: @@
 **Lift Height** specifies the height for the lifting procedure, as described in the **Knife Up Programming**. This value is set to be in millimeters.
+====Other tools====
+The X1366V profile allows for tangential cutting control not only with a simple cutting knife, but a variety of other tools such as a half-knife, creasing wheel, 45 degree knife, and more. Tools can be combined into a single job by importing a DXF file with pre-defined layers which will be assigned to different technologies. If a tool does not require tangential cutting control (such as a spindle), it can also be defined in the myCNC software to be assigned to a separate layer/pen in the DXF/HP-GL file respectively.
+The important part about tangential cutting control is the ability to use the rotation axis (axis C in the X1366V profile). This is turned on by the following code that is included in the M6 macro (the M6 macro is responsible for switching between the tools):
+<code>G10 L80 P7005 Q1</code>
+Similarly, turning tangential cutting off is done by using the following code in the M6 macro:
+<code>G10 L80 P7005 Q0</code>
+This allows us to use the rotation axis when necessary by writing a ''1'' or a ''0'' into the register #7005:
+{{:quickstart:mycnc-quick-start:tangential-knife-quickstart-009.png}}
+Since having a number of tools in the same program is typically necessary, we can turn tangential cutting (utilizing the rotation axis) only for the tools that require it, such as the Knife and Creasing Wheel (shown in the screenshot above). The other tools (camera, pen, spindle, etc) will have tangential cutting turned off by having their register #7005 contain a 0.
+Using register #7005 therefore allows the operator to utilize a variety of tools with tangential control features.
 ====Importing DXF files into myCNC====
@@ Line 51: / Line 81: @@
 The DXF import procedure automatically generates the knife turn/knife lift G-codes which are inserted into the program, and which correspond with the settings listed in Config > Technology > Tangential Knife. This allows for easy set up provided the DXF file has been correctly modelled.
+A full manual on importing DXF files is available [[quickstart:mycnc-quick-start:dxf-import|here]].