Delcam Showcases Feature-Based Programming at MACH
Delcam will demonstrate the ease and speed of programming that is possible with its FeatureCAM feature-based CAM system on stand 4011 at MACH. The latest release, FeatureCAM 2012 R2, includes important new strategies for roughing and turn-mill operations, alongside a range of more general enhancements for faster toolpath generation.
FeatureCAM was the world’s first feature-based programming software when it was launched in 1995. Constant development since then has ensured that the system has retained its leadership in programming speed and ease of use, while an increased range of strategies has been added to provide more efficient toolpaths giving greater machine productivity.
The main addition to FeatureCAM 2012 R2 is a series of new strategies for 2.5D roughing. These include a continuous spiral option to minimise wear on the cutter and machine tool, high-speed roughing options, including trochoidal machining and Delcam’s patented Race Line Machining, and “tear-drop” moves to clear corners more smoothly. In addition, more styles of leads and links can now be used to give greater overall efficiency for the toolpaths.
Stepovers for 2.5D mill roughing can now be set as large as the tool diameter itself. Previously, stepovers were limited to 50% of the tool diameter and, if this limit was exceeded, the toolpath would leave stands. The new algorithm supports larger stepovers by providing extra moves automatically to clean up those stands.
Other milling improvements include an option to add an extra profile pass exactly at the base of flat pockets, the ability to use face-milling tools with chamfered edges to machine chamfers as well as faces and so minimise the number of tools needed, and a choice of right- or left-handed thread-milling tools resulting in either climb or conventional machining of the thread.
Roughing has also been improved for users of turning equipment that can operate with live tooling. A new option allows cutting with a live milling tool, while the workpiece is rotating in the turning spindle. This approach avoids the issues associated with interrupted cutting and ensures regular chip breakage, so removing any chance of wrap-around by the swarf.
Turn-mill programming has been improved with the addition of more flexible five-axis positioning. For example, any amount of negative b-axis movement available can be used, so avoiding extending the y limit too far back into the machine. Switching the positioning angles in this way makes editing easier to keep the machine within its travel limits.
Another turn-mill improvement is support for cylindrical interpolation, which allows toolpaths to be created with NC code for a plane and then wrapped around a cylinder. This approach, which can also be used for four-axis milling, allows cutter compensation to be applied when calculating the toolpath and gives smaller NC code files.
