On Tue, 8/6/13, Sven Wesley <[email protected]> wrote: Subject: Re: [Emc-users] Planning phase for new machine, need decision support To: "Enhanced Machine Controller (EMC)" <[email protected]> Date: Tuesday, August 6, 2013, 12:17 AM
The palette I'm going to use as a table is pretty heavy, and put a mould half on top of that. That's at least 100 kg moving parts, maybe more. And I want at least 5 m/min transport, the double would make me satisfied but that means too large motors and screws for the budget I think. -------------------------- You need to figure out how much torque you'll need. Some people have used motors from Fisher and Paykel clothes washers and directly fit them to the table screws on milling machines. How much torque? Up to 40 Newton-meters for the Ma series, up to 50 for the MB series. http://www.fp.fisherpaykel.com/direct-drive-motors/common/pdf/4876_NZ_Motors_BRO_HR.pdf The motors on my 2400 pound Acra knee mill peak at 3 Newton-meters and use cogged belts for speed reduction. A 50 Nm motor directly coupled to the screw on such a mill would be pretty crazy. ;-) I wonder if those motors (which look to me like very overgrown 3.5" floppy drive motors) could be stacked and the windings connected in parallel for even more power? In any case those motors seem to be plentiful and cheap if you live in a country where F&P is a common appliance brand. (The motors are also sought after by homebrew wind generator builders to convert into alternators.) ------------------------------------------------------------------------------ Get your SQL database under version control now! Version control is standard for application code, but databases havent caught up. So what steps can you take to put your SQL databases under version control? Why should you start doing it? Read more to find out. http://pubads.g.doubleclick.net/gampad/clk?id=48897031&iu=/4140/ostg.clktrk _______________________________________________ Emc-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/emc-users
