DTHC-SETUP/INSTALL MANUAL CandCNC

TIP SAVER %: This value determines the lowest the DTHC will let the torch head go downbefore it locks movement. It’s a percentage of the Preset Tip Volts. It constantly measures theactual tip volts and if the value is too high,it keeps the Torch from moving down any lower.(remember that if the actual voltage is ABOVE the Preset it will LOWER the torch until they match.)Under certain cutting conditions, for example where the cut passes over a void or another cut line,the voltage will go up, and the normal reaction is for the torch to “dive” down. The torch will diveany time the flame has less metal to cut. At the end of a closed cut (i.e a circle or polyline object)where the end is close to the beginning the voltage will climb and cause the torch to dive down. Insome cases it hits the metal. By setting the Tip Saver % to a value that represents a voltage thatwill still have the tip off the metal, tip crashes are prevented. Since the head is free to climb up itjust sets a minimum gap based on the volts. This feature can save tips and even end caps andtorch damage from the head dropping into a void.UPPER FAULT LIMIT/LOWER FAULT LIMIT: Consider this to be an outside (of the Lock%) set of limits that detect a serious fault condition and applies one or more of the General THCparameters. The Upper fault limit is in absolute volts. It’s in Tip Volts (rather than a percentage) It’sthe highest volt reading you will allow before the fault triggers one or more of the actionparameters. Since a high voltage would indicate a large gap and the possibility of the torch cuttingair over a void the User can define that motion STOPs, the Torch turns off and the Torch raisesrapidly to Safe Z height (set in MACH). Unlike the Head Lock, set by the TIP SAVER % value, thisdoes not just inhibit the Z movement, but instead shuts down operation. The act of running off theside of a piece of material or entering a section already cut can drive the head down. The headlock will prevent it from going too low, but not stop the machine. The Faults will trigger after thehead locks (and voltage still keeps climbing or lowering) and execute the selected items in theGeneral THC Settings.______________________________________________________________________________NOTE: THE FOLLOWING SETTINGS ARE FOR UNITS THAT HAVE THE DIGITALCURRENT PROBE (DCP) OPTION. If you do not have the DCP installed and setup, the valueslisted have no effect. When the DCP is used the return current is displayed on the TORCH AMPSReadout (DRO).and used by the settings below to trigger certain functions. Please see the DCPsection in this manual for setup and calibration of the DCP.Arc OK Current (AMPS). The minimum current to turn on the ARC OK signal. This worksin parallel with any existing ARC OK signal from the plasma or can be used as the exclusive ARCOK sensor. By setting the ARC OK value for different materials you can fine tune the cut processso that thicker material requires more ARC OK Current. Set the ARC OK Current to approx ½ ofthe normal Cut Current of the material as a default starting point. You can adjust that value bymaterial type if you want.PAGE 42