![]() ![]() In this section, the usage of G02 (Circular Interpolation Clockwise), G03 (Circular Interpolation Counterclockwise) and Cutter Compensation (G41: Cutter Compensation Left, G42: Cutter Compensation Right) is described. Note that a small cut of less than the tool radius and at a right angle to the previous motion will work only with the Fanuc setting. These diagrams show how cutter compensation works for the possible values of Setting 58. It joins outside angles of more than 270 degrees with an extra linear motion. The control joins outside angles less than or equal to 270 degrees with a sharp corner. However the control will generate an alarm if the cutter’s path is programmed so that it will overcut. If Setting 58 is set to Fanuc, the control does not require that the tool cutting edge be placed along all edges of the programmed contour, preventing overcutting. A circular motion joins all of the outside angles. If Setting 58 is set to Yasnac, the control must be able to position the side of the tool along all of the edges of the programmed contour without overcutting the next two motions. Available Setting 58 values are Fanuc or Yasnac. ![]() Setting 58 controls how this part of cutter compensation works. The control checks these (3) blocks of information for interference. However, it will look ahead at the next (2) blocks that have X or Y motions. The control operates on one motion block at a time. You may not end a program (M30, M00, M01, or M02) with cutter compensation active. When cutter compensation is not active, the programmed path is the same as the center of the cutter path. G40 cancels cutter compensation and is the default condition when you power on your machine. Cutter compensation is limited to compensation in only the X-Y plane. Also, when cutter compensation is active (G41 or G42), you may use only the X-Y plane (G17) for circular motions. For example, a negative value entered for a G41 will behave as if a positive value was entered for G42. If the offset value is negative, cutter compensation operates as though the program specifies the opposite G code. The number to use with D is in the far-left column of the tool offsets table.The value that the control uses for cutter compensation is in the GEOMETRY column under D (if Setting 40 is DIAMETER) or R (if Setting 40 is RADIUS). G42 selects cutter compensation right, which moves the tool to the right of the programmed path, with respect to the direction of travel.Ī G41 or G42 command must have a Dnnn value to select the correct offset number from the radius / diameter offset column. This means that the control moves the tool to the left of the programmed path (with respect to the direction of travel) to compensate for the tool radius or diameter defined in the tool offsets table (Refer to Setting 40). The tool starts at X0 Y0, moves to the starting point of the arc, and cuts the arc to the end point : The other method to cut an arc is to define the X Y Z values for the end point and to define the radius of the circle with an R value.īelow are examples of using the two different methods to cut a 2" (or 2 mm) radius, 180 degree, counter-clockwise arc. Defining only the I J K values and not defining the end point X Y Z values will cut a circle. This is also the only method to cut a circle. The X Y Z values define the absolute X Y Z distances from the starting point to the end point of the arc within the current coordinate system. The I J K values define the relative X Y Z distances from the starting point to the center of the circle. The preferred method is to define the center of the arc or circle with I, J and/or K and to define the end point of the arc with an X, Y and/or Z. The arc or circle begins cutting from the current cutter position to the geometry specified within the G02/ G03 command.Īrcs can be defined using two different methods. Circular Interpolation Motion has several optional address codes to define the arc or circle. G02 and G03 are the G-codes for circular cutting motions. G253 Orient Spindle Normal To Feature Coordinate System ![]()
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