>>I am trying to do champagne on a soda budget You are not alone. :-)
>>I am looking at about $70 per axis for those amps. That is really cheap. How much power or torque do you need? There was a guy selling brushless drives and motors out of Canada (Vancouver?) for a while on Ebay and his setups were very inexpense. Dave On 4/23/2011 10:49 AM, Robert Pabon wrote: > Yeah, the 80v is the only real downer for me as well but everything else > looks good. The PWM command eliminates the need for a pwn to analog > conversion card so that is good. cost wise I am waiting on a final answer but > they are cheap. My budget is minimal and I am trying to do champagne on a > soda budget. I am looking at about $70 per axis for those amps. > > --- On Fri, 4/22/11, andy pugh<bodge...@gmail.com> wrote: > > >> From: andy pugh<bodge...@gmail.com> >> Subject: Re: [Emc-users] Motion control cards >> To: "Enhanced Machine Controller (EMC)"<emc-users@lists.sourceforge.net> >> Date: Friday, April 22, 2011, 2:50 PM >> On 22 April 2011 22:26, Robert Pabon >> <robertpa...@corseusa.com> >> wrote: >> >>> Man my head is starting to spin! No wonder people just >>> >> go with steppers and call it a day. Maybe my vision is >> clouded by ignorance but it doesn't seem like it should be >> that hard to pick up a brushless DC motor, a suitable amp >> and make it work. >> >> The issue is that to commmutate a brushless motor the drive >> needs to >> know the rotor position. There are lots of ways that that >> information >> can be transmitted, and the manufacturers seem to like to >> choose >> deliberately incompatible methods (possibly so that they >> can guarantee >> motor and drive compatibility). >> >> >>> http://www.servodynamics.com/Drawing/23S-IE.pdf >>> >> Looks good. No wierdness there, just conventional Hall >> sensors and an >> incremental encoder. That's about as easy as it gets. >> >> >>> http://www.a-m-c.com/download/datasheet/bd30a8.pdf >>> >> That one looks a little easier than the other, as it takes >> a PWM input >> rather than an analogue voltage. >> It claims to allow you to swap the hall phasing between 60 >> and 120 >> degrees, so combined with the 6 possible ways to connect >> the halls and >> the 6 possible ways to connect the power cables I think >> all >> possibilities are covered. >> The drawback of the AMC drive you linked is that it only >> goes up to 80V. >> >> How much are they? >> >> -- >> atp >> "Torque wrenches are for the obedience of fools and the >> guidance of wise men" >> >> ------------------------------------------------------------------------------ >> Fulfilling the Lean Software Promise >> Lean software platforms are now widely adopted and the >> benefits have been >> demonstrated beyond question. Learn why your peers are >> replacing JEE >> containers with lightweight application servers - and what >> you can gain >> from the move. http://p.sf.net/sfu/vmware-sfemails >> _______________________________________________ >> Emc-users mailing list >> Emc-users@lists.sourceforge.net >> https://lists.sourceforge.net/lists/listinfo/emc-users >> >> > ------------------------------------------------------------------------------ > Fulfilling the Lean Software Promise > Lean software platforms are now widely adopted and the benefits have been > demonstrated beyond question. Learn why your peers are replacing JEE > containers with lightweight application servers - and what you can gain > from the move. http://p.sf.net/sfu/vmware-sfemails > _______________________________________________ > Emc-users mailing list > Emc-users@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/emc-users > > ------------------------------------------------------------------------------ Fulfilling the Lean Software Promise Lean software platforms are now widely adopted and the benefits have been demonstrated beyond question. Learn why your peers are replacing JEE containers with lightweight application servers - and what you can gain from the move. http://p.sf.net/sfu/vmware-sfemails _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
