On 31/10/10 12:16, Andy Pugh wrote: > > However, you might be better with a full 5-axis kinematics and driven > rotaries. :-) >
This is probably best as I do want to eventually add a stepper to drive the angle at which I present the tool (when I can figure out how to machine a worm& wheel accurately, but I am thinking of buying a small rotary table to use instead). I am just starting to explore using the machine and have only so far cut a couple of patterns along the face of a bowl so have not yet decided on the best way of assigning axes etc. In those tests, I had a fixed tool position so assigned the C axis for headstock rotation and Z for depth movement and the X axis for radial tool movement. Now I have added a movable tool post under stepper control I have another degree of freedom. For many simple patterns I can keep the same axis assignment as I had before as I will not be using the pumping movement. However when using pumping and cutting on a face I will have two motions in the the same (possibly directly opposite) direction being driven by different steppers. In this case I was thinking of assigning Z for tool depth cutting direction, X as radial movement as before, but now Y for headstock movement and thus B for headstock rotation (see http://blog.alanbattersby.co.uk/wp-content/uploads/2010/10/assign_axes.jpg). So here Y and Z would be in the same direction!! It doesn't sound right does it what should I do? My problem is getting axis to accurately represent the correct cutting path if at all possible. I understand that axis will correctly draw the tool path but unfortunately in my case this will not be the correct actual path because unlike a standard mill or lathe the workpiece will also be moving. Should I really be looking at using and modifying the lathe configuration or looking to do some heavy tinkering with the axis source? Alan ------------------------------------------------------------------------------ Nokia and AT&T present the 2010 Calling All Innovators-North America contest Create new apps & games for the Nokia N8 for consumers in U.S. and Canada $10 million total in prizes - $4M cash, 500 devices, nearly $6M in marketing Develop with Nokia Qt SDK, Web Runtime, or Java and Publish to Ovi Store http://p.sf.net/sfu/nokia-dev2dev _______________________________________________ Emc-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/emc-users
