I hadn't come across the high surface speed version of 'HSM' only the adaptive clearing of Fusion 360 and the similar looking trochoidal plug-in for CamBam.

It's the ability to use high depth (that sounds like it should be a contradiction!) of cut that is most appealing, partly because of the gear-cutting issue mentioned above and also because of the increased tool life to be expected. Shorter cutting times are also a bonus as it reduces the time for which I'm producing noise in a residential street.

My spindle is the ever-popular Huan Yang 2.2KW water-cooled beastie capable of 24000 rpm.

CamBam users may not be aware of the range of plugins available from the following link. The main site is in French but the plug-ins page is in English. The list of free goodies available is amazing and greatly extends the basic program to include features you would otherwise have to buy other, much more expensive software to obtain. V-Engrave, Arc Text, Text on Polyline and Trochoidal Pocket being just some of the ones I've already used. There is also a very active support community for all the plugins on the relevant forum page.

http://www.atelier-des-fougeres.fr/C...ugin_menu.html