Ed wrote: > Andy Holcomb wrote: > >> Does anyone know the price an encoder that would work on this machine >> with emc and not made out of gold? >> > > The encoders are standard TTL out put with differential, just use the > non-inverted signals if you need single end, there is also a tach output. > > >> Will the geckos run these motors? and are they good with emc? I am >> trying to get an idea of the cost to retro fit it. >> > > > Geckos should run OK but probably not to full potential since they have > an 80V limit. I use 320 Geckos on a mill useing EMC and except for the > lower speed it works Ok > > > > >>> Assuming resolver feedback there are a couple things you can do. The >>> first is get a resolver to quadrature converter box. With such a box >>> you get the signal generator to power the resolver and a fixed number of >>> pulses per rotation of it. You could also replace the resolver with an >>> encoder. This is what MattS and I did with a Hardinge lathe. He had a >>> little spindle built that matched the size and arrangement of the >>> Harosun(sp) resolver and mounted a shaft encoder on top of it. >>> > > Thats the plan for a Hardinge CHNC I picked up cheap, I have a couple of > ideas on turning the turret but don't mind suggestions! > > > > >>> Okay. Let's say now that you've got quadrature feedback of axis and >>> spindle position. Now you need a way to get those signals into the PC >>> running EMC2. Several board makers have devices that can do this. EMC >>> has HAL driver modules that can read these. In alphabetical order, some >>> of these include. Mesa, Pico, Pluto, STG, Vigilant, Vital. You'll find >>> links to these companies at www.linuxcnc.org. >>> >>> And lastly you will have to produce a velocity signal of the sort >>> expected by the motor's drive amplifier. In that age most of the drives >>> used an analog signal that varied between -10v and +10 volt. Again the >>> board makers will usually have that ability as well. >>> > > > I have schematics of this part if needed. Ed. > Thanks Ed Andy > ------------------------------------------------------------------------- > This SF.net email is sponsored by DB2 Express > Download DB2 Express C - the FREE version of DB2 express and take > control of your XML. No limits. Just data. Click to get it now. > http://sourceforge.net/powerbar/db2/ > _______________________________________________ > Emc-users mailing list > Emc-users@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/emc-users > >
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