I've found that a half stepping motor (400step/rev) with a scale of 2000 steps/inch (5 turns/inch screw lead) works pretty well for a 100ipm with software stepping.
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----- Original Message ----- From: "Chris Albertson" <albertson.ch...@gmail.com> To: "Enhanced Machine Controller (EMC)" <emc-users@lists.sourceforge.net> Sent: Friday, September 16, 2016 12:06:47 PM Subject: Re: [Emc-users] Got "new" PC, some question about setting it up. Gene, That was a good data point: " 60IPS". May I ask about the lead screw and if you are micro stepping? And the motor size. I think I'm going to design for a target speed of 100 IPS but if it comes out 60 I'll be happy. On Thu, Sep 15, 2016 at 11:55 AM, Gene Heskett <ghesk...@shentel.net> wrote: > On Thursday 15 September 2016 12:16:45 Chris Albertson wrote: > > > Hello, > > > > Got a "new" computer I saved from going to the dump. II am going to > > it use for LinuxCNC. I tested latency for a good 30 minutes and got > > just under 30,000 over 20,000 on the display. The PC is an Intel i7, > > 2.67 GHz, 4GB RAM and no built-in graphics on the mother board. There > > is a video card in one of the slots. One PCI slot is free. > > > > I want to run some NEMA 23 stepper motors to control a Sieg X2 mill. > > (aka "Mini Mill".) Yes, call it a "toy" but the parts I want to make > > would fit on your open hand. I have a rotary table I am converting > > also and hope one day to be able to do 4-axis work. > > > > Questions: > > > > 1) Is it worth it to experiment with different video drivers and such > > to reduce the latency? The numbers look good enough already, I think. > > > Not for moving steppers at usable speeds. > > > 2) What would I gain by using a Mesa card over a parallel port card? > > I don't have either one of these now and would need to buy one or the > > other and with only one PCI slot I can use only one card. > > A mesa 5i25 with a 10 dollar breakput board on the other end of a parport > cable essentially removes the boxes latency from the equation because > all you will need is the much slower servo-thread. I still have one > software stepper driven machine, and its slow, and z now misses pulses > at a maxvel it was happy with at ubu8.04 LTS. So I intend to put one of > the 5i25's in it before too long. Its in a box on the floor beside this > chair right now. I have the exact same motor on my toy lathe, and with a > 5i25 issuing the marching orders it can do 60 ipm without losing a step. > The software stepping machine is an identical intel D-525-MW, but no > 5i25. 8 ipm is the speed limit if I don't want it to lose steps. Thats > a huge difference. Best dollars you will spend. > > Cheers, Gene Heskett > -- > "There are four boxes to be used in defense of liberty: > soap, ballot, jury, and ammo. Please use in that order." > -Ed Howdershelt (Author) > Genes Web page <http://geneslinuxbox.net:6309/gene> > > ------------------------------------------------------------ > ------------------ > _______________________________________________ > Emc-users mailing list > Emc-users@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/emc-users > -- Chris Albertson Redondo Beach, California ------------------------------------------------------------------------------ _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users ------------------------------------------------------------------------------ _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
