ModuleWorks is at the forefront of 5-Axis machining and Simulation technology, providing the toolpath generation and CNC simulation components behind many of the popular CAM systems available today. The new release offers a range of new features across the product range, further expanding capability for 3 to 5-Axis machining and simulation. ModuleWorks has announced the latest release of its CAM components, version 2012.4. Product News ModuleWorks Launches New 2012.4 CAM Components
CNC SIMULATOR TILT ARCHIVE
Write a program similar to the example that takes some cutting operation, puts it in a subprogram, and then uses G68 to rotate it to multiple positions around the circle.CIMdata PLM Industry Summary Online Archive – A part that is otherwise too large for a machine might fit if you could take advantage of the extra long diagonal dimension.
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– You may be able to nest more parts on your machine table if you can perform arbitrary rotations on them. – If a part program is written for a bigger machine and has more Y-travel (extents) than X, you may be able to rotate the coordinates so the long axis is aligned with yo ur X and still be able to run it. This can reduce setup time by reducing the need to be accurate and trammed in. If you can probe the fixture to determine its angle, you can apply a G68 to “zero out” that angle and then run the part program. For example, suppose you wanted to run without tramming in a fixture. – Align work that is not exactly aligned to the coordinate system. This will also reduce the memory requirements of the part program. – Simplify your part program by creation of subprograms that repeat cutting operations multiple times along an arc. Here are some examples (for completeness, we include the subprogram example too): Other Uses for G68 Coordinate Rotationīeside the obvious usefulness of rotating the coordinates before calling a subprogram so that the same cut may be applied along a circular path, there are other important uses for G68. The value (address) of the word is ignored, but any I will cause Mach3 to treat the coordinate as relative. For Mach3, it is a function of whether the “I” word is present (think “I” for “Incremental”). For most controls, the decision of whether subsequent G68’s are relative or absolute is a parameter. In this case, rather than having multiple G68’s replace the values, they are relative to the values. There is the option on some controls to make G68’s relative, rather than absolute. The first G68 in the example would be written like so:Īs you can see from the example, multiple G68’s just replace the R or center values. Rather than having the coordinate words vary with which plane is selected (G17, G18, or G19), Mach3 just uses the “A” and “B” words. R specifies the angle of rotation in degrees, counterclockwise.įor Mach3, we use a slightly different syntax: In the example, we had the circle center at X0Y0. Where, alpha and beta are words for the 2 coordinates of the circle’s center we want to rotate about. Syntax for G68 Coordinate System Rotation (Fanuc & Mach3) This is one of the many tricks discussed in our CAM Toolpath Considerations page of the Feeds and Speeds Cookbook. You’ll get a much better finish if your tool arcs into the cut rather than just heading straight in along a line. G68 rotated the “arched doorway” slot through 3 calls of a subprogram to create 3 slots…īTW, those fans in the middle of each pocket are tool entry and exit paths. G0 Z3 G0 X0 Y0 M99Īnd here is what the simulation in G-Wizard Editor looks like: M98 P0071 G69 (Turn off coordinate rotation so it doesn’t confuse us later! ) G0 G90 Z250 M9 G0 G91 G28 Z0 Y0 M5 M30 M98 P0071 ( Third time we rotate 240 degrees
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M98 P0071 ( Second time we rotate 120 degrees ) ( Example use of G68 to make 3 slots in a circle ) T10 M6 G0 G90 G54.1 P20 X0 Y0 S8000 M3 G43 Z3 H22 D22 M8 ( First time we don’t rotate the slot ) We write a subprogram to do the arched doorway, and we want to be able to rotate the coordinates as we call the doorway subprogram for each slot. Let’s suppose we have a part that requires 3 “arched doorway” slots.
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This is a perfect excuse to use G68 coordinate system rotation. The repeats are all laid out on a circle around some center point. Consider, for example, a case where you want to repeat a pocket or slot multiple times on a part. It can be very convenient to be able to execute g-code with the assumption that the coordinate system has been rotated. G68 & G69 G Codes: CNC Coordinate Rotation Introduction