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thc:thc [2019/11/28 10:15]
ivan
thc:thc [2020/03/13 10:17] (current)
ivan
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     - Make a test straight cut and check Arc Voltage during the cut (it is "​96V"​ for the setup below). \\ \\ {{hardware:​thc:​mycnc-thc-011.png}}     - Make a test straight cut and check Arc Voltage during the cut (it is "​96V"​ for the setup below). \\ \\ {{hardware:​thc:​mycnc-thc-011.png}}
  
-This second method is recommended for more experienced users who want more granularity and quality control.+This second method is recommended for the more experienced users.
  
 **5.** Select the proper ratio, as described in the Initial Setup part. **5.** Select the proper ratio, as described in the Initial Setup part.
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 {{:​thc:​thc-setup-007-acceleration.png}} {{:​thc:​thc-setup-007-acceleration.png}}
  
-**8.** Set the **THC Low Speed** value. Whenever the speed of the machine will fall lower than this value, the possibility of the arc voltage fluctuating rises greatly. Thus, to prevent the torch from diving, the last height value before the speed goes below your THC Low Speed value is taken and maintained until the speed rises back up again. ​+**8.** Set the **THC Low Speed, [%] of feedrate** value. Whenever the speed of the machine will fall lower than this percentage of the feedrate, the possibility of the arc voltage fluctuating rises greatly. Thus, to prevent the torch from diving, the last height value before the speed goes below your THC Low Speed percentage ​value is taken and maintained until the speed rises back up again. ​ 
 + 
 +The below diagram illustrates the way THC Low Speed works. On corners (green), the speed falls below the typical Feedrate #1 (red), so it can be used to disable THC on sharp corners. Feedrate #2 (blue), which is typically different from Feedrate #1, is used for hole and arc cutting. This way, THC will still be ON at smooth corners: 
 + 
 +{{:​thc:​plasma-setup-016-percentage-cutting-hole-speed.png}}
  
 **9.** Select the Hi/Lo event output port (63 by default). **9.** Select the Hi/Lo event output port (63 by default).
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 The next step is to check if THC is ON in the User Settings. The next step is to check if THC is ON in the User Settings.
  
-It can be a button in User settings ​of an item in PLC settings. Both settings will turn THC on/off and both represent the same variables - the user can decide which one they want to use out of convenience.+It can be a button in User settings, or a toggle ​in the PLC settings ​(Settings > PLC). Both settings will turn THC on/off and both represent the same variables - the user can decide which one they want to use out of convenience. Typically, the User Settings window is used
  
 {{:​thc:​thc-setup-user-settings-001.png}} {{:​thc:​thc-setup-user-settings-001.png}}
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   * **IHC Cutting Height**. After the pierce time has elapsed, the machine moves the torch to the cutting height at which the cutting will begin.   * **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 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.+  * **THC Pre-off time**. In order to prevent sudden movements due to rapid voltage changes as a cut (especially when cutting a hole) is finishing up, 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. ​   * **Lift After Cut Height** to move the torch up to after the cut has completed. ​
  
thc/thc.1574954159.txt.gz · Last modified: 2019/11/28 10:15 by ivan