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--- mycnc:mycnc_advantages [2019/05/14 12:58] – ivan
+++ mycnc:mycnc_advantages [2019/05/14 13:34] – ivan
@@ Line 58: / Line 58: @@
 ===Cutting from the edge of the sheet===
-In case the cutting is done on a thick sheet, it can be hard to perform the initial cut in order to break through the material for the first time. In this case, the edge cutting function can be used, since the breakthrough process is a lot less demanding if performed on the edge of the sheet. In this mode, a spot for the cut will be selected, the part itself is selected through scrolling to the necessary cutting command (as shown above), after which the operator can move the machine from the cutting position to the closest point at the edge of the material sheet and turn on the edge cutting mode.
+In case the cutting is done on a thick sheet, it can be hard to perform the initial cut in order to punch through the material for the first time. In this case, the edge cutting function can be used, since the breakthrough process is a lot less demanding if performed on the edge of the sheet. In this mode, a spot for the cut will be selected, the part itself is selected through scrolling to the necessary cutting command (as shown above), after which the operator can move the machine from the cutting position to the closest point at the edge of the material sheet and turn on the edge cutting mode.
-This will automatically start the initial contact and ignition procedure, after which the machine will automatically move directly to its actual cutting position upon reaching which it will continue to execute the cutting program.
+This will automatically start the initial contact and ignition procedure, after which the machine will move directly to its actual cutting position upon reaching which it will continue to execute the cutting program.
 ===Parts Library===
@@ Line 86: / Line 86: @@
 The results of the system working with such an imported DXF file, library parts, or part multiplication are saved as G-code files. Therefore, the myCNC software can be used with third-party CNC control systems to prepare the necessary G-code commands.
+===Cut Charts===
+myCNC software makes it possible to create cut charts for different types of plasma cutting sources. The list of parameters that the operator indicates when loading a module from a table can be configured. Usually the following parameters are considered:
+  * material (regular steel, stainless steel, aluminum, titanium, etc)
+  * thickness
+  * cutting current
+When loading the control system, the following parameters will be loaded from the cut charts (provided they have been inputted)
+  * Cutting speed
+  * Ignition height
+  * Punching height
+  * Punching time
+  * Cutting height (arc reference voltage for THC)
+  * Cutting current
+  * Magnitude of current decrease at the trajectory corners
+  * Cut width adjustment (kerf)
+  * Crawling speed (during punching through)
+  * Driving time at creeping speed (when punching)
+  * The delay time to enable tracking after punching
+  * Gas parameters for manual and automatic Hypertherm console (type of cutting and shielding gases, MixGas1, MixGas2 gas mix values, plasma torch cutting and shielding channel pressure values during Preflow and Cut)
+  * Consumable components of the plasma torch as auxiliary information for the operator of the machine (types of electrodes, nozzle, protective nozzle, protective cap, swirl and water tube)
+{{mycnc:screens:mycnc-profiles--47.png}}
+{{mycnc:screens:mycnc-profiles--65.png}}
+{{mycnc:screens:mycnc-profiles--66.png}}
+===Torch Height Control===
+Unlike many CNC systems, myCNC has full integration of the THC (torch height control) system. This brings along the following benefits:
+  * Cutting height (THC reference voltage) is set in the CNC system itself (not on an external THC, as in many other systems). In addition, the optimal value for the cutting height can be loaded from the Cut Chart when selecting the material thickness.
+  * The system implements several algorithms to prevent the plasma torch from diving - a THC start delay, THC preemptive shutdown, and THC momentary shutdown when cutting speed drops below a predetermined value, as well as during abrupt voltage surges.
+<code>
+NOTE:
+Arc voltage is not stable for the first few tens or hundreds of milliseconds
+after the material has been punched through.
+At the end of the cutting process, the plasma torch passes over an already cut out trajectory,
+where the arc length and the arc voltage increase.
+The arc also lengthens and its voltage increases at the corners of its path as the
+cutting speeds lower and and more material is burned though.
+When the arc passes through the cut, the arc voltage can increase
+up to a few dozen volts.
+All of these factors can lead to short-term diving when running THC,
+leading to the plasma torch nearly touching the material
+Timely reactions to such situations and short-term blocking of
+torch height control in such scenarios is an effective method of diving prevention. </code>
+  * In addition to the work on the pre-set arc voltage (loaded from the table), the THC myCNC system is able to measure the real arc voltage after punching and is to maintain this voltage during the cutting process. This tracking method is becoming increasingly popular, as it allows you to get away from the effect of "floating" the arc voltage during the life cycle of the plasma torch consumables. The arc voltage when using new nozzle electrodes will differ from the arc voltage when using nozzle electrodes that have completed several hundred ignitions. In this case, when the arc voltage is preset (loaded from the table), the system will control the constant voltage level by changing the height of the plasma torch. Turning on the voltage tracking mode will ensure that the plasma torch height remains constant.