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1. MILLING CANNED CYCLES. CNC 8065 (REF: 1209) ·62· G212. Outside thread milling cycle 1.12 G212. Outside thread milling cycle Canned cycles (·M· model) This cycle may be used to make an outside thread through a helical movement of the tool. Working in Cartesian coordinates, the basic structure of the block is as follows: G212 Z D I J K B C L A E Q L K B Parameter definition: Z Reference plane. Defines the reference plane coordinate. It may be programmed either in absolute or incremental coordinates, in which case it will be referred to the starting plane. If not programmed, it assumes as reference plane the current position of the tool. D Safety distance. Defines the distance between the reference plane and the surface of the part where the milling is to be done. If not programmed, it assumes 0. I Machining depth. Defines the threading depth. It may be programmed either in absolute or incremental coordinates, in which case it will be referred to the reference plane. J Thread diameter. Defines the nominal diameter of the thread The sign indicates the machining direction of the thread (positive if clockwise and negative if counterclockwise). K Thread depth. It defines the distance between the crest and the root of the thread. J D B Thread pitch. Defines the thread pitch. With a positive sign, the direction of the thread pitch is from the surface of the part to the bottom. With a negative sign, the direction of the thread pitch is from the bottom to the surface of the part. C Type of tapping. Defines the type of tapping to be carried out. This parameter depends on the type of tool being used. When programming C= 0, the threading will be done in a single pass. When programming C=1, it will make one thread per each pass (single-edge cutter). When programming C=n (where n is the number of cutting edges of the cutter), it will make n threads per each pass. If not programmed, a value of C=1 is assumed. I Z G00 G01 G98 G99 M03 M04
Canned cycles (·M· model) L Finishing stock. It defines the finishing stock at the bottom of the thread. If not programmed, a value of 0 is assumed. A Maximum penetration step. Defines the maximum penetrating pass of the thread. If not programmed or programmed with a 0 value, it will run a single pass up to the finishing stock. E Approach distance. Approach distance to the thread entry. C=0 C=1 C>1 Q Thread entry (start) angle. Angle (in degrees) of the segment formed by the center of the hole and the thread entry point with respect to the abscissa axis. If not programmed, a value of 0 is assumed. Basic operation 1 Rapid movement to the center of the hole (X, Y). 2 Rapid movement to the reference plane (Z). 3 Rapid movement of the plane axes to the thread entry point (it only makes this movement if parameter E has been programmed). 4 Rapid movement to the thread entry point coordinate along the longitudinal axis. 5 Rapid movement to the thread entry point (movement interpolated in 3 axes). 6 Thread entry with a helical movement tangent to the first helical threading path. 7 Making the thread according to the value of parameter C. C=0 Helical movement, in the direction indicated in parameter J, to the bottom of the thread (the movement will only be one revolution). Then, helical thread exiting movement, tangent to the previous helical path. It must be borne in mind that in the exit tangent to the helical path, the exit point will exceed the coordinate of the bottom of the thread along the longitudinal axis. C=1 Helical movement, with the pitch and direction given in parameter J, to the bottom of the thread. Then, helical thread exiting movement, tangent to the previous helical path. It must be borne in mind that in the exit tangent to the helical path, the exit point will exceed the coordinate of the bottom of the thread along the longitudinal axis. C=n Threading loop until reaching the bottom of the thread. Helical movement, with the pitch and direction given in parameter J, (the movement will be one revolution). Helical thread exiting movement, tangent to the previous helical path. Rapid movement to the Z coordinate of the thread entry point of the next threading path. It must be borne in mind that in the last helical exit, the exit point will exceed the coordinate of the bottom of the thread along the longitudinal axis. 8 Rapid movement to the reference plane (G99). 9 Repetition of steps 3 to 8 until reaching the depth of the finishing stock. 10 Repetition of steps 3 to 8 until reaching the bottom of the thread. 11 Rapid movement to the reference plane (G99) or to the starting plane (G98). 1. MILLING CANNED CYCLES. G212. Outside thread milling cycle CNC 8065 (REF: 1209) ·63·
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CNC 8065 Canned cycles (·M· model
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Canned cycles (·M· model) INDEX A
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Canned cycles (·M· model) ABOUT T
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Canned cycles (·M· model) Softwar
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Page 19: Canned cycles (·M· model) MATERIA
Page 23 and 24: MILLING CANNED CYCLES. 1.1 General
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Page 65 and 66: MULTIPLE MACHINING 2 The programmer
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Page 73 and 74: Canned cycles (·M· model) Y J Y D
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Canned cycles (·M· model) 4.8 Rea
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Canned cycles (·M· model) 4.9 Bor
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Canned cycles (·M· model) 4.10 Bo
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Canned cycles (·M· model) 4.10.1
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Canned cycles (·M· model) I Penet
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Canned cycles (·M· model) Type of
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Canned cycles (·M· model) θ Pene
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Canned cycles (·M· model) 4.13 Ci
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Canned cycles (·M· model) The fin
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Canned cycles (·M· model) F Surfa
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Canned cycles (·M· model) 4.15 2D
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Canned cycles (·M· model) T Rough
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Canned cycles (·M· model) New pro
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Canned cycles (·M· model) P.XY Na
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Canned cycles (·M· model) Fz Pene
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Canned cycles (·M· model) Program
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Canned cycles (·M· model) Configu
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Canned cycles (·M· model) 4.17 Re
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Canned cycles (·M· model) I Penet
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Canned cycles (·M· model) Z Part
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Canned cycles (·M· model) The rou
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Canned cycles (·M· model) F Surfa
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Canned cycles (·M· model) The rou
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Canned cycles (·M· model) 5 Rapid
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Canned cycles (·M· model) 4.24 Mu
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Canned cycles (·M· model) 4.25 Mu
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Canned cycles (·M· model) 4.27 Ra
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Canned cycles (·M· model) CNC 806
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