Mastercam X7's Blend Mill toolpath now includes additional controls to produce exactly the tool motion you want for your part. Just like the chain synchronization options that are available in Mastercam Wire, you can now adjust your toolpath motion by synchronizing your two selected chains. You apply the synchronization method when you first select your chains (in the Chaining Options dialog box).
You can also adjust the sync mode within the Chain Manager for an existing toolpath to see how different sync options may adjust your toolpath.
The following graphics show the same part with no sync and with syncing by entity.