This is a good idea! I will look around for it! Now I have a single stage ring blowers. That blower has not much flow volume…How much volume do you have with Fume Control System? Best wishes from Germany!
I'm not completely sure what you mean by probing, as the term is used for a few different functions on different CNC machines and software. Arc Voltage Feedback is the most common method of controlling and maintaining the distance between the front most part of a plasma torch and the surface of the workpiece. The correct torch height is necessary in order to control cut quality (angularity, dross formation) as well as to minimize the possibility of the torch dragging on the workpiece, causing a bad cut and possible damage to the torch and consumables. All plasma cutting torches have arc voltage, which is a DC (direct current) voltage that can be monitored between the torch electrode (negative polarity) and the workpiece (positive polarity). During steady state cutting (with the torch at a known physical distance from the workpiece) a steady voltage reading can be observed. If there is any warpage in the workpiece this steady voltage will change as the torch gets either closer or further distance from the workpiece, with the voltage becoming lower when closer and higher when further from the workpiece. So, a torch height control system (THC) uses software and electronics as well as a z axis motor drive to monitor this feedback voltage and will automatically move the torch closer to the workpiece if the arc voltage increases, and further away if the voltage decreases from a known value. So, arc voltage control improves cut quality and minimizes the chance of plate collision, and is only functional once the plasma establishes a cutting arc between the plasma torch and the workpiece (metal being cut). Note that the other primary z axis and height control function is to locate the surface of the workpiece accurately before the torch fires so that the torch height can achieve the recommended (by the plasma cutter manufacturer) pierce height. Pierce height is always higher than cut height to protect the torch consumables from being damaged during the initial pierce at the beginning of each cut cycle. Different height control systems use a few types of measurement techniques to locate the surface of the workpiece with the two most popular being "ohmic sensing" and "limit switch or floating head" sensing devices. Often this initial surface sensing is called "probing", and it occurs before arc voltage sensing even starts. I hope this answers your question! Jim Colt
Hi Jim, I have one question. I have Thc on my plasma table with a power max 45 xp. Works absolutely awesome. But my screen has the Ihs. I never use it. And my cuts are always great. I am using pronest lt and love this system. I think some of the drawing functions on fusion are better but I love how simple it is to draw in libre cad send it to pronest for a cut simulation and if all is good just export and cut. Seems like the fusion has a lot of steps to get to the actual cut … I’m not a computer guy so this system is great for me. Easy to understand and cut with. Thanks for all your videos now and in the past. I went with hypertherm because of your videos. Had a Eastwood versa 60. Was ok ….. but it’s no hypertherm for sure. And like you have always said. Clean dry air will make for great consumable life. I couldn’t agree more , over 1,900 cuts and finally now the electrode looks like it needs changing. Still cuts great. I’m using fine cut because I’m cutting 5052 aluminum.063 cuts soooo clean and my table is always clean unlike when I was cutting steal.
That motor in the blower box is an open motor, not TEFC.
This is a good idea! I will look around for it! Now I have a single stage ring blowers. That blower has not much flow volume…How much volume do you have with Fume Control System? Best wishes from Germany!
I'm not completely sure what you mean by probing, as the term is used for a few different functions on different CNC machines and software. Arc Voltage Feedback is the most common method of controlling and maintaining the distance between the front most part of a plasma torch and the surface of the workpiece. The correct torch height is necessary in order to control cut quality (angularity, dross formation) as well as to minimize the possibility of the torch dragging on the workpiece, causing a bad cut and possible damage to the torch and consumables.
All plasma cutting torches have arc voltage, which is a DC (direct current) voltage that can be monitored between the torch electrode (negative polarity) and the workpiece (positive polarity). During steady state cutting (with the torch at a known physical distance from the workpiece) a steady voltage reading can be observed. If there is any warpage in the workpiece this steady voltage will change as the torch gets either closer or further distance from the workpiece, with the voltage becoming lower when closer and higher when further from the workpiece. So, a torch height control system (THC) uses software and electronics as well as a z axis motor drive to monitor this feedback voltage and will automatically move the torch closer to the workpiece if the arc voltage increases, and further away if the voltage decreases from a known value.
So, arc voltage control improves cut quality and minimizes the chance of plate collision, and is only functional once the plasma establishes a cutting arc between the plasma torch and the workpiece (metal being cut).
Note that the other primary z axis and height control function is to locate the surface of the workpiece accurately before the torch fires so that the torch height can achieve the recommended (by the plasma cutter manufacturer) pierce height. Pierce height is always higher than cut height to protect the torch consumables from being damaged during the initial pierce at the beginning of each cut cycle. Different height control systems use a few types of measurement techniques to locate the surface of the workpiece with the two most popular being "ohmic sensing" and "limit switch or floating head" sensing devices. Often this initial surface sensing is called "probing", and it occurs before arc voltage sensing even starts. I hope this answers your question! Jim Colt
Hi Jim, I have one question. I have Thc on my plasma table with a power max 45 xp. Works absolutely awesome. But my screen has the Ihs. I never use it. And my cuts are always great. I am using pronest lt and love this system. I think some of the drawing functions on fusion are better but I love how simple it is to draw in libre cad send it to pronest for a cut simulation and if all is good just export and cut. Seems like the fusion has a lot of steps to get to the actual cut … I’m not a computer guy so this system is great for me. Easy to understand and cut with. Thanks for all your videos now and in the past. I went with hypertherm because of your videos. Had a Eastwood versa 60. Was ok ….. but it’s no hypertherm for sure. And like you have always said. Clean dry air will make for great consumable life. I couldn’t agree more , over 1,900 cuts and finally now the electrode looks like it needs changing. Still cuts great. I’m using fine cut because I’m cutting 5052 aluminum.063 cuts soooo clean and my table is always clean unlike when I was cutting steal.