ISO programming
G128
G128
Refer to your machine manual.
This function must be enabled and adapted by the machine manufacturer.
With this cycle you can program a guide slot in two dimensions and then transfer it onto a cylindrical surface. Unlike Cycle 27, with this cycle, the control adjusts the tool in such a way that, with radius compensation active, the walls of the slot are nearly parallel. You can machine exactly parallel walls by using a tool that is exactly as wide as the slot.
The smaller the tool is with respect to the slot width, the larger the distortion in circular arcs and oblique line segments. To minimize this process-related distortion, you can define the parameter Q21. This parameter specifies the tolerance with which the control machines a slot as similar as possible to a slot machined with a tool of the same width as the slot.
Program the center path of the contour together with the tool radius compensation. With the radius compensation you specify whether the control cuts the slot with climb milling or up-cut milling.
The cylinder must be set up centered on the rotary table. Set the preset to the center of the rotary table.
This cycle performs an inclined machining operation. To run this cycle, the first machine axis below the machine table must be a rotary axis. In addition, it must be possible to position the tool perpendicular to the cylinder surface.
The machining time can increase if the contour consists of many non-tangential contour elements.
Help graphic | Parameter |
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Q1 Milling depth? Distance between cylindrical surface and contour floor. This value has an incremental effect. Input: –99999.9999...+99999.9999 | |
Q3 Finishing allowance for side? Finishing allowance on the slot wall. The finishing allowance reduces the slot width by twice the entered value. This value has an incremental effect. Input: –99999.9999...+99999.9999 | |
Q6 Set-up clearance? Distance between the tool face and the cylindrical surface. This value has an incremental effect. Input: –99999.9999...+99999.9999 or PREDEF | |
Q10 Plunging depth? Tool infeed per cut. This value has an incremental effect. Input: –99999.9999...+99999.9999 | |
Q11 Feed rate for plunging? Traversing feed rate in the spindle axis Input: 0...99999.9999 or FAUTO, FU, FZ | |
Q12 Feed rate for roughing? Traversing feed rate in the working plane Input: 0...99999.9999 or FAUTO, FU, FZ | |
Q16 Cylinder radius? Radius of the cylinder on which the contour will be machined. Input: 0...99999.9999 | |
Q17 Dimension type? deg=0 MM/INCH=1 Program the rotary axis coordinates in degrees or mm (inches) in the subprogram. Input: 0, 1 | |
Q20 Slot width? Width of the slot to be machined Input: –99999.9999...+99999.9999 | |
Q21 Tolerance? If you use a tool smaller than the programmed slot width Q20, process-related distortion occurs on the slot wall wherever the slot follows the path of an arc or oblique line. If you define the tolerance Q21, the control adds a subsequent milling operation to ensure that the slot dimensions are as close as possible to those of a slot that has been milled with a tool exactly as wide as the slot. With Q21, you define the permitted deviation from this ideal slot. The number of subsequent milling operations depends on the cylinder radius, the tool used, and the slot depth. The smaller the tolerance is defined, the more exact the slot is and the longer the re-machining takes. Recommendation: Use a tolerance of 0.02 mm. Function inactive: Enter 0 (default setting). Input: 0...9.9999 |
NC programs contained in this User's Manual are suggestions for solutions. The NC programs or individual NC blocks must be adapted before being used on a machine.
Some NC programs depend on the machine kinematics. Adapt these NC programs to your machine kinematics before the first test run.
In addition, test the NC programs using the simulation before the actual program run.
With a program test you determine whether the NC program can be used with the available software options, the active machine kinematics and the current machine configuration.
11 CYCL DEF 28 CYLINDRICAL SURFACE SLOT ~ | ||
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