THC-A2 Automatic Torch Height Control for Mechanized Plasma ...

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Installation and setup of ROBOTORCH THC CAUTION: Portion of this install may include opening your plasma power supply and attaching wires. MAKE SURE THE UNIT IS UNPLUGGED prior to removing any cower or making any connections. Plasma units have HIGH VOLTAGES present that can be dangerous or lethal. IF YOU ARE NOT EXPERIENCED WORKING WITH HIGH VOLTAGES DO NOT ATTEMPT TO INSTALL THIS OR ANY OTHER DEWICE INSIDE YOUR PLASMA UNIT YOURSELF. SEEK PROFFESSIONAL HELP. 1. Install Interface card (voltage divider). Best place to install interface card is inside of the plasma power supply. The connections are made trough the screw terminal blocks. Picture 6. Terminal block Block number Will be connected 1 and 2 (CNC) input to computer controlled output of CNC controller, such as the one that turns plasma torch ON and OFF. 3 and 4 (PL) output to plasma trigger switch 5 and 6 and 7 (COL) output to CNC controller. 5 and 6 are normally open, 6 and 7 normally closed. Will be switch if horizontally collision happens. 8 (OS) to torch tip (ohmic touch-retract initial height sensing). NOT tip voltage! Ohmic touch-retract initial height sensing functioning if 12 is connected to. 9 and 10 (FR ) edge “freeze” input. Stops making adjustments to avoid drop 6
the torch if cutting speed will be slow down. (Need edge “freeze” output in CNC controller). 11 (-) to ( - ) The Tip Voltage (Arc voltage). About 300 VDC open circuit. 12 (+) to ( + ) The plasma machine chassis. DB9 to THC-A2 control console 2. Install the control console and remote control box. It could be in the table or mounted in the wall. Don’t cover cooling holes on the bottom! The control console had 2 DB9 connectors. One of them must be connected to the interface card (voltage divider) and other to the torch lift station. Connect power supply. It works with 100-240 VAC and transform it to 24 VDC. 3. Mount the torch lift station with 4 screws and connect (DB9 connector) it with cable (shipped with) to the control console. Mount the torch. If torch is mounted like in picture 13: - set upper limit (move small rubber O-ring in the belt up or down). -collision control switch must by push down, otherwise THC don’t work and in remote control you will see “COLLISION ” Final setup and testing 1. Switch power ON. (Don’t switch plasma power supply ON ) 2. Torch must move up to the limit and stop. 3. In LCD you will see Picture 7. 4. Now you could set arc voltage and pierce height. 5. If CNC controller relay connect screws 1 and 2 in terminal block, torch move down and little bit up to the pierce height. Check, haw heavy it pushes down by sensing blade surface. If ohmic sensor is connected properly it will sense it very soft. This test is reasonable to do with thin plate 6. In LCD you will see Picture 10. Torch will move up to the limit, and down again. 7. Switch plasma power supply ON. 8. If you start cut now, you will see arc voltage picture 8 in the LCD. If you will push pierce height set button now, torch will be freeze and no torch height adjustments occurs. 9. If a vertically collision happens, the torch will jump up to the pierce height and continuing cutting. In LCD you will see Picture 11. 10. If a horizontally collision happens, plasma and CNC controller will be switch OFF and all stops. In LCD you will see Picture 12. 11. Place torch in a right place, turn THC power OFF, wait a second and turn it ON. Everything is OK again. 7
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Page 3 and 4: 2. Control console and remote contr
Page 5: Features of the THC-A2 - Arc Voltag

THC-A2 Automatic Torch Height Control for Mechanized Plasma ...

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