I did an introductory CNC course down at my local hackerspace a year ago or so...
They always said that cutting aluminium takes alot of practice. The area of successfull feedrates/plungerates settings are way narrower than when cutting wood/plastics. They weren`t afraid we`d hurt the CNC in anyway (professional grade huge machine) but it would quickly become very expensive changing out the (broken) cutting heads. They also hated the cheap cutting heads available from ebay etc.
Haven`t really been down there since then, and I`ve only used the machine with plastic and alot of help setting up the toolpaths so...
They always said that cutting aluminium takes alot of practice. The area of successfull feedrates/plungerates settings are way narrower than when cutting wood/plastics. They weren`t afraid we`d hurt the CNC in anyway (professional grade huge machine) but it would quickly become very expensive changing out the (broken) cutting heads. They also hated the cheap cutting heads available from ebay etc.
Haven`t really been down there since then, and I`ve only used the machine with plastic and alot of help setting up the toolpaths so...