2.5d CNC machining an aluminum torque arm 

2000mm/min 20000rpm / 5% trochoidal stepover / 33% trochoidal width. To be honest this is mostly guesswork and not the result of precise calculations - I do not cut much aluminum and with trochoidal milling enabled feeds and speeds work well over a large range of values. I used the feed override during machining to reduce the feed a little - it initially just shook the machine too much and made filming difficult. Edit: I just aim to achieve nice "needle" chips - then everything is fine. If the chips are dust feeds are too low and / or rpm too high, if the chips are heavily deformed feeds are too high and or rpm too low.

Thank you, it seems my tools break before i get a chance to override the settings... maybe i should try trochoidal

60 USD or similar it's very cheap but you can do a lot as you can see

It's actually free, if you don't mind waiting a few seconds to export.

Hi, thank you - I appreciate every link. Maker faire Berlin is unfortunately too far away and also no time next week.

I know - I'm not sure if You remember, few weeks ago Friend of My wrote you an email from Poland. Since that time we are providing some tests and publicate results at our FB . Shortly our Project of CNC for Makers will be over and Estelcam will be one of this platforms witch we will seriously recomend to builders as base Cam and Machine Control Software. We are testing your Software also under Linux ( No is not mistake ) There is kind software translation platform that allow to start your software also in Linux At the moment I provided first Gcodes still left to test controling of the Machine via Arduino UNO. I was hope to talk and tell You all this informations in Berlin. So now we are Done :)