In the Tool Path Operation dialog in MecSoft CAM (i.e., RhinoCAM, VisualCAD/CAM, or VisualCAM for SolidWorks) navigate to the Cut Parameters tab and you will find the Compensation parameter. It is located at the top just below the Tolerance and Stock parameters. Set Compensation to either AUTO/ON or CONTROL/ON. The dialog for the 2½ Axis Profiling tool path is shown below.
Cutter Compensation will only be enabled when the Entry Motion of your tool path is set to Linear. On the Entry/Exit tab there are controls for defining both the Entry and the Exit motions of the toolpath. You must select Lines & Arcs as the entry method. You can set the Approach Motion Length (L) if you wish. Doing so will satisfy the Linear entry requirement. If you set Length (L) to zero then you must set the Engage Motion to Linear and enter a value for Length (L) there. This will satisfy the Linear entry requirement. The Entry/Exit tab of the dialog is shown below.
For most CNC controllers, the Cutcom Register value should be set to the same value as the Cutting Tool number. So if you are using Tool #1 the Cutcom Register value would be set to 1. Check with your CNC machine tool manufacturer or supplier to understand how Cutter Compensation is enabled in your controller. The Cutcom Register parameter is located in the Properties tab located on the right side of the Create/Select Tool dialog. An example is shown below.
From the dialog, make sure you have your desired post-processor selected from the list located under Current Post Processor. Now select the Edit button located to the right of the name of your selected post-processor. This will display the Post-Processor Generator (PPG).
With the Cutter Compensation from the left selected, you see three macros, one for Cutcom Left, Cutcom Right, and Cutcom Off. These must be defined in order for Cutcom to be enabled in your posted g-code file.
With the above 4 steps completed correctly, Cutter Compensation will be enabled when you post your G-Code file. In the illustration and sample G-Code file below we see Cutcom is first disabled on line N1G40. This is in case Cutcom has been previously left enabled. Then on line N10G41 Cutcom is enabled prior to the linear entry motion.