![]() ![]() You can then use both spindles to support a workpiece at both ends for maximum support and minimum vibration. In SSC mode, both spindles accelerate, maintain speed, and decelerate together. This is called Synchronous Spindle Control (SSC) mode. This means that when the main spindle receives a command to turn, the secondary spindle turns at the same speed, in the same direction. Once G112 is active, all motions are programmed with XYZ and C cannot be used.Īll X values are in radius when using G112.ĭual-spindle lathes can synchronize the main and secondary spindle. Since the spindle is not turning in G112, “feed per inch” (G98) must be selected. They are also available for a tool in any of the three plane selection (G17, G18, G19).Ī Lathe with Y-axis can use G112 and it can be useful to extend the range of travel of the live tool all the way across a part.Ĭircular motion (G02 and G03) in any of the three planes (G17, G18, G19) are also available with G112. ![]() The tool centerline programing (G40) and cutter diameter compensation (G41/G42) are available with G112. ![]() The G112 code allows 3-D contouring using the X, Y, and Z axes. The G112 code is intended to be used with a Lathe using the C-axis and Live Tooling to program cutter anywhere along a non-rotating part. ![]() Refer to Chapter 16 for more information on modal G-codes. Cuts that must cross spindle center can be accomplished with two parallel passes on either side of spindle center.Ĭartesian to Polar conversion is a modal command. If necessary re-orient the program so the cut does not go over the center of the part. Tool paths should never cross the spindle centerline. Note: Programmed moves should always position the tool centerline. This feature allows face machining programming in the Cartesian coordinate system. Normally a straight line would require many points to define the path, however, in Cartesian, only end points are necessary. G112 also converts X, Y position commands into rotary C-Axis and linear X-axis moves.Ĭartesian to Polar coordinate programming greatly reduces the amount of code required to command complex moves. While it is active, the control uses the G17 XY for G01 linear XY strokes and G02 and G03 for circular motion. The G112 XY to XC coordinate interpolation feature lets you program subsequent blocks in Cartesian XY coordinates, which the control automatically converts to polar XC coordinates. ![]()
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