Differences

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--- mycnc:ihc [2019/11/07 08:55] – ivan
+++ mycnc:ihc [2019/11/07 10:36] – ivan
@@ Line 6: / Line 6: @@
   * **Ohmic Sensor**. The ohmic sensor is triggered at the moment the outer casing of the plasma torch touches the working metal - the difference in voltage is registered by a sensor which indicates that the torch is right at the surface of the metal.
-  * **Floating Head**. A floating head system uses a spring which presses a button after the torch has come into contact with the work surface, which signals that the torch has touched the metal. It is important to note that this system typically gets triggered only after some additional travel (the machine has to travel a little lower than the torch contact point to compress the spring enough) - this must be accounted for.
+  * **Floating Head**. A floating head system uses a spring which presses a button after the torch has come into contact with the work surface, which signals that the torch has touched the metal. It is important to note that this system typically gets triggered only after some additional travel (the machine has to travel a little lower than the torch contact point to compress the spring enough - this must be accounted for).
   * **Probe Sensor (pneumatic cylinder)**. Typically, a pneumatic system lowers down some sort of a probe sensor which will be set up lower than the plasma torch. The machine travels downwards until the probe is triggered, and then the probe is pulled back up as to not interfere with the cutting process.
-The myCNC IHC system allows the user to work with all three of these systems, with the setup process being similar between them all. Despite mechanical differences in these IHC systems, the way the controller performs the IHC procedure makes the IHC setup fairly universal.
+The myCNC IHC system allows the user to work with all three of these systems, with the setup process being similar between all of them. Despite mechanical differences in these IHC systems, the way the controller performs the IHC procedure makes the IHC setup fairly universal.
 Two out of three systems listed above (the Ohmic and the Probe Sensor) require the IHC system to only work before the cutting process starts. For the ohmic sensor, this is due to the fact that it must only register the voltage drops during the IHC process, while the probe sensor needs to be brought down/up before the cutting process as to not interfere with it. Therefore, these two systems require an **INPUT** from the sensor to the controller - the signal that indicates that contact has been made - and an **OUTPUT** from the controller to the IHC system housing those sensors, which indicates that these systems must be activated during the IHC phase.
-On the other hand, the floating head system simply requires an **INPUT** to the controller to indicate the button press. It does not need to be retracted or turned off when the cutting commences, so no OUTPUT from the controller is needed. Therefore, in order to set up the IHC system within the myCNC software, the user needs to assign at most two connections (or only one, in the case of the floating head mechanism).
+On the other hand, the floating head system simply requires an **INPUT** to the controller to indicate that the button has been pressed. It does not need to be retracted or turned off when the cutting commences, so no OUTPUT from the controller is needed. Therefore, in order to set up the IHC system within the myCNC software, the user needs to assign at most two connections (or sometimes only one, in the case of the floating head mechanism).
 The INPUT sensor will be assigned in the ''pins.h'' file (found in Settings > Hardware > PLC > Hardware PLC) as ''INPUT_IHC'', while the OUTPUT connection will be assigned as ''OUTPUT_PROBE''. Then, the sequence will be the following:
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 {{:mycnc:plasma-ihc-004.png}}
+After the contact has been made, the machine will travel up by the IHC Ignition Height + the IHC Correction Height:
+{{:mycnc:plasma-ihc-006.png}}
+If, for example, a pneumatic probe system has been used, the IHC Ignition Height is equal to 6.0, and the IHC Correction Height is equal to 1.0, the system will go up by 7.0 mm after contact with the working surface has been made.
 ====IHC and Arc Sensors====