Incoming block - molybdenum wire - discharge gap - workpiece - workpiece pad - pulse source, which is the high frequency power supply channel to the gap pulse current. Any part of this channel should be insulated from the machine bed. There are four reasons for this:
First, to effectively protect the guide wheel, do not make the current through the guide wheel and bearing. Because the guide wheel bearing is fixed on the wire frame of the bed body, although the guide wheel sleeve is insulated, it is soaked with water and dirt, and the insulation is not reliable enough. In order to prevent current from flowing through the guide pulleys and bearings through the bearing seat to the bed, the bed and the high frequency source must be insulated.
Second, the protection of silk tube bearings and wire guide rails. The reason is also to prevent the passage of electric current from the molybdenum wire, to the package, to the bearing, to the guide rail, to the bed body.
. Third, to protect the stepper motor winding and housing insulation. Because the stepper motor winding is directly connected to 0V-24V, due to the frequency conversion sampling, the negative electrode of the high frequency power supply also communicates with 0V. At this time, once the waste or workpiece contacts with the bed, the whole potential difference of the high frequency power supply It is added between the motor winding and the motor housing, and it is easy to cause the stepper motor winding and the casing to break down and burn out.
Fourth, prevent energy loss and ensure the peak current of the pulse source. Once the insulation of the electric block or workpiece strip and the bed is reduced, the bed becomes a power loss resistance of the positive and negative poles of the short-circuit or partial short pulse source, energy is lost, the current peak is weakened, and the sampling is not accurate. Cutting efficiency will be significantly reduced.
Therefore, the insulation of the electric block, the workpiece pad and the bed must be inspected frequently and maintained frequently to maintain a high dielectric strength. This is a very important part of machine maintenance.
First, to effectively protect the guide wheel, do not make the current through the guide wheel and bearing. Because the guide wheel bearing is fixed on the wire frame of the bed body, although the guide wheel sleeve is insulated, it is soaked with water and dirt, and the insulation is not reliable enough. In order to prevent current from flowing through the guide pulleys and bearings through the bearing seat to the bed, the bed and the high frequency source must be insulated.
Second, the protection of silk tube bearings and wire guide rails. The reason is also to prevent the passage of electric current from the molybdenum wire, to the package, to the bearing, to the guide rail, to the bed body.
. Third, to protect the stepper motor winding and housing insulation. Because the stepper motor winding is directly connected to 0V-24V, due to the frequency conversion sampling, the negative electrode of the high frequency power supply also communicates with 0V. At this time, once the waste or workpiece contacts with the bed, the whole potential difference of the high frequency power supply It is added between the motor winding and the motor housing, and it is easy to cause the stepper motor winding and the casing to break down and burn out.
Fourth, prevent energy loss and ensure the peak current of the pulse source. Once the insulation of the electric block or workpiece strip and the bed is reduced, the bed becomes a power loss resistance of the positive and negative poles of the short-circuit or partial short pulse source, energy is lost, the current peak is weakened, and the sampling is not accurate. Cutting efficiency will be significantly reduced.
Therefore, the insulation of the electric block, the workpiece pad and the bed must be inspected frequently and maintained frequently to maintain a high dielectric strength. This is a very important part of machine maintenance.
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