Methods for solving interference problems by CNC plasma cutters
Why is the CNC plasma cutter in the cutting control system will appear wavy patterns? Even when cutting occasionally run the phenomenon? The solution is a partial ground wire that may be affected by interference.
Plasma torch gas road to do a good job away from the CNC machine tool control system.
Ground the plasma cutter power housing with a wire.
Grounding the power supply unit of the driver, the shielded cable with copper and aluminum as the shield can effectively suppress high-frequency electromagnetic interference, and the electrostatic induction of the changing electric field to the core wire can be suppressed after the shield is grounded.
The filter is connected to the inlet line of the control system or the inlet of the plasma cutter power supply. A filter is a device that eliminates interference, filtering the inputs or outputs to obtain pure direct current. A circuit that effectively filters out a frequency of a particular frequency or a frequency other than that frequency is a filter, which is to obtain a specific frequency or to eliminate a specific frequency.
CNC cutting host housing ground;
The CNC plasma arc cutting machine covers a large area, it is best to lay the ground unit separately (at least 3 meters under ground), and the grounding device should be reliably connected to the guide rail, cabinet and even cable sliding bracket of the machine. This makes the sensitive high-frequency interference voltage on the case have a low-impedance leakage channel, so that there is no accumulated charge and the possibility of increasing the voltage of the case, is safer for the personnel, and is conducive to the suppression of interference shock.
The strong and weak power in the cabinet strictly separates the line, the change rate of voltage and current in the strong wire is large, the electric field changes are produced, the electromagnetic wave interference is formed, and the nearby signal line and weak power control line are seriously affected. Keeping the signal line away from the strong wire, and the reasonable choice of shielding wire, twisted pair wire, can avoid interference signal in the transmission of the signal.
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