Igor Chudov wrote: > I am not too far from adding a 4th axis to my Bridgeport Interact > mill. The 4th axis will be a servo driven rotary table that sits > vertically on the milling table, so that the axis of the rotary ta ble > is parallel to X. > > I have a question, inspired by a recent discussion. > > Let's say I wanted to mill a helical spiral. > > Can I use EMC2 to instruct the milling table to move along X at a > given velocity, while at the same time, the rotary table is turning > with another given angular rotational speed. In other words, can I > specify two speeds, one for XYZ move and another for the angular > speed? > You can't specify two speeds, but you can decide how much to rotate the A axis (A is parallel to X) during the XYZ move.
This is how the manual describes combined linear and rotary motion: "If any of XYZ are moving, F is in units per minute in the XYZ cartesian system, and all other axes (UVWABC) move so as to start and stop in coordinated fashion" So, if you want to make a helical groove that wraps around the workpiece 3 times, you need to perform a 1080 degree move (3 * 360) along with whatever the XYZ move is: G1 X 3 A 1080 F 1 The line above will make a single groove that wraps around the stock 3 times, with 1 inch spacing between, and it will take 3 minutes to complete (F1 for 3 inches = 3 minutes). So basically the rotational speed is adjusted so that the rotation takes the same amount of time as the linear motion. - Steve ------------------------------------------------------------------------------ What happens now with your Lotus Notes apps - do you make another costly upgrade, or settle for being marooned without product support? Time to move off Lotus Notes and onto the cloud with Force.com, apps are easier to build, use, and manage than apps on traditional platforms. Sign up for the Lotus Notes Migration Kit to learn more. http://p.sf.net/sfu/salesforce-d2d _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
