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--- mycnc:mycnc_advantages [2019/05/14 13:19] – ivan
+++ mycnc:mycnc_advantages [2020/07/31 11:06] – ivan
@@ Line 13: / Line 13: @@
 This article goes over a number of such advantages and opportunities that are present in myCNC software compared to the other major CNC control systems.
-====Plasma and Oxy-fuel Cutting====
 ===Stopping and resuming the program===
@@ Line 28: / Line 25: @@
 This function is similar to the one described above, however, the program is stopped automatically due to a break in the plasma torch arc. The program can be resumed by pressing the Run button after eliminating the source of the break (by cleaning the plasma torch, replacing the nozzle, etc).
-===Drafting mode===
+===Simulation mode===
-By pressing a button on the remote control or on the screen of the control system, the system can be set to a drafting mode. This will ignore the start commands for cutting, initial positioning and firing cycles. When launching the control program, the machine will only perform idle movements within the program (movements at the working cutting speed or accelerated movements at the idle stages speed are also possible).
+By pressing a button on the remote control or on the screen of the control system, the system can be set to a simulation (jog toolpath) mode. This will ignore the start commands for cutting, initial positioning and firing cycles. When launching the control program, the machine will only perform idle movements within the program (movements at the working cutting speed or accelerated movements at the idle stages speed are also possible).
 ===Running the program backwards and forwards===
-In drafting mode, one can move within the program both forwards and backwards. This is extremely useful in case the operator needs to cut out a part from the few remaining bits of material, and an idle run is necessary to check that the part can fit in the space that remains before the actual cutting starts.
+In simulation mode, one can move within the program both forwards and backwards. This is extremely useful in case the operator needs to cut out a part from the few remaining bits of material, and an idle run is necessary to check that the part can fit in the space that remains before the actual cutting starts.
 {{:mycnc:001-forwards-backwards.jpg}}
@@ Line 40: / Line 37: @@
 In comparison with the "search by frame number" method employed by traditional CNC systems, this implementation performs significantly better in terms of time spent and ease of operation.
 {{:mycnc:007-fast-forward.jpg}}
+===Hole Cutting===
+{{:mycnc:mycnc-advantages-001-hole-cutting.png}}
+A 2D (or a 2.5D) file such as the one shown above contains both the outer and the inner contours of the part being cut. In certain applications (plasma cutting, tangential knife cutting) it is preferable to have a separate (often lower) speed for the holes that are located inside the main contour. However, a number of CAM programs do not accommodate for this need if they do not have an implementation for two separate speeds.
+To solve this issue, myCNC features an Arcs Slow Speed Control settings (Settings > Motion) which allows the user to quickly set up hole cutting speed based on the arc diameter of the hole in question:
+{{:mycnc:mycnc-advantages-002-hole-cutting.png}}
 ===Detail Multiplication===
@@ Line 56: / Line 63: @@
   * A heavy sheet that has been put down slightly asymmetrically, with the cutting map having to be adjusted to take this sheet rotation into account
   * Using the last remaining bits of material that require the part to be rotated or mirrored in order to fit it in
+Read more about this feature [[mycnc:mycnc_rotate_widget|here]].
 ===Cutting from the edge of the sheet===
@@ Line 93: / Line 102: @@
 When loading the control system, the following parameters will be loaded from the cut charts (provided they have been inputted)
-  * cutting speed
+  * Cutting speed
-  * ignition height
+  * Ignition height
-  * punching height
+  * Punching height
-  * punching time
+  * Punching time
-  * cutting height (arc reference voltage for THC)
+  * Cutting height (arc reference voltage for THC)
   * Cutting current
-  * The magnitude of current decrease at the trajectory corners
+  * Magnitude of current decrease at the trajectory corners
-  * Cut width adjustment (Kerf)
+  * Cut width adjustment (kerf)
   * Crawling speed (during punching through)
   * Driving time at creeping speed (when punching)
@@ Line 106: / Line 115: @@
   * 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.