Differences

This shows you the differences between two versions of the page.

--- thc:thc [2019/10/24 12:07] – ivan
+++ thc:thc [2019/11/05 15:00] – ivan
@@ Line 128: / Line 128: @@
 ===Check Additional Machine/User Settings===
-The **Arc Voltage Control** setting signifies the THC behaviour that the user prefers.
+The **Arc Voltage Control** setting signifies the THC behaviour that the user prefers. The underscores signify whether or not the Torch Height Control will have a THC Start Delay (the entries with underscores do have the start delay, while the entries without the underscores will ignore the THC Start Delay).
 {{:thc:thc-setup-user-settings-003.png}}
@@ Line 138: / Line 138: @@
   * **_Measure** - similar to regular Measure, the reference voltage value is recorded by the controller prior to the THC Start. THC Start Delay WILL be used.
-A skilled operator can also control the reference arc voltage, if necessary, to bring the torch up/down, however the system allows for a fully automatic Torch Height Control through these settings. The underscores signify whether or not the Torch Height Control will have a THC Start Delay (the entries with underscores do have the start delay, while the entries without the underscores do not).
+A skilled operator can also control the reference arc voltage, if necessary, to bring the torch up/down, however the system allows for a fully automatic Torch Height Control through these settings.
-NOTE: It is usually recommended to have some amount of THC Start Delay in order to prevent THC from making the torch moving erratically during the initial cutting phase.
+**NOTE:** It is usually recommended to have some amount of THC Start Delay in order to prevent THC from making the torch moving erratically during the initial cutting phase.
 **Creep Speed** can be set up in order to signify the speed during the creep phase of the machine movement. The Creep speed is set on the CNC Speeds screen as a percentage of the Cut Speed. This setting can help improve the initial plasma arc stability, especially when cutting materials of a considerable thickness. Set the **Creep Time** (in seconds) to signify the amount of time for which the Creep Speed will be active, or set it to 0 to disable Creep Speed entirely.
 {{:thc:thc-setup-user-settings-004.png}}
+====THC diagram====
+The THC diagram in the User Settings allows the operator to tweak the THC settings in a simple visual way - arrows signify time, values signify height. The following settings are available:
+{{:thc:thc-setup-012-diagram.png}}
+  * IHC Correction Height. The correction height is typically set once per machine, and signifies the correction between the IHC sensor and the actual height of the plasma torch. Read more about the IHC Correction height in the [[mycnc:ihc|IHC manual]].
+  * IHC Ignition Height. After contact, the torch rises to the Ignition Height and waits for the arc signal.
+  * IHC Pierce Height. After receiving the arc signal, the torch rises to the pierce height and begins the pierce procedure.
+  * IHC Pierce Time. The pierce time specifies the amount of time, in seconds, allocated to the pierce procedure.
+  * IHC Cutting Height. After the pierce time has elapsed, the machine moves the torch to the cutting height at which the cutting will begin.
+  * THC Start Delay signifies the time for which Torch Height Control is not turned on after the cutting has started (to prevent metal splashes/voltage variations that are often present at the beginning of the cut to impact the cutting procedure). This delay can be set to ON or OFF in the User Settings.
+  * THC Pre-off time. In order to prevent sudden movements due to rapid voltage changes as a cut (especially when cutting a hole) is done, THC can be turned off some time before the end of the cut and the machine will be kept at a set height until the THC system will move to the next cut.
+  * Lift After Cut Height to move the torch up to after the cut has completed.
 ==== Registers to control THC ====