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. ------------------------------------------------------------------------- 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 [email protected] https://lists.sourceforge.net/lists/listinfo/emc-users
