The servos on my BP knee mill with an Anilam 1100M conversion have timing belt reduction to the ball screw... and so does my CHNC.
JT On 1/24/2017 10:03 AM, [email protected] wrote: > Don't servos need a lot of reduction to get the torque up? Gearboxes always > bring backlash into the system. Low backlash boxes are lots of $$$. > > > > Danny > > ---- dragon <[email protected]> wrote: >> I hate to say it but I'm with Ed on this one. I just paid $32 each for >> e661 servos WITH encoders to put on my 10x24 lathe and Jet 626 mill. >> Grab a free thrown out PC and get rid of the noise problems from that >> SPI bus on the rPi. Analog input drives can be had on ebay for $35, >> especially if you run under 80vDC. With my 96v supply I hope to be up >> around 150ipm. >> >> While 3 phase steppers are MUCH better than two phase for all of the >> reasons that Danny listed, you can spend the same amount or less for a >> servo setup if you don't mind some used components. >> >> After having worked with both, I knew that I wouldn't be happy with a >> stepper system even for my little home machines. >> >> Just my opinion... >> >> On 01/24/2017 08:49 AM, Ed wrote: >>> On 01/23/2017 11:45 PM, Gene Heskett wrote: >>>> Greetings all; >>>> >>>> I see some "Nema 24" motors at quite reasonable prices showing up on >>>> fleabay, >>> SNIP >>>> Now, I don't believe this is going to help with the resonance stalls I am >>>> getting at about 30 ipm, so I'm thinking of building a viscous damper to >>>> fit on the rear of this puppy. But unlike the ones on my hf micromill, >>>> which are long steel spools carrying a 2+ inch stack of heavy fender >>>> washers with elastomer sheets between the washers, which are true shock >>>> absorbers as the resonance is killed by the frictional losses as the >>>> washers walk on the talcum covered elastomer, but I don't have room for >>>> a 2+" stack of fender washers in this spot. 5/8" axially at best. >>> SNIP >>>> Cheers, Gene Heskett >>> >>> RANT MODE ON >>> >>> Why in this day of cheap encoders, small ebay servo motors, and good >>> inexpensive servo drives does any one even use stepper motors? >>> >>> Dampers, resonance issues, lost steps, stalls, only 30 IPM? Why? >>> >>> Gene, don't stay on the dark side! Go to servo's and don't look back, >>> you will never regret it. >>> >>> RANT MODE OFF >>> >>> ----deflates----- >>> >>> Ed. >>> >>> >>> ------------------------------------------------------------------------------ >>> Check out the vibrant tech community on one of the world's most >>> engaging tech sites, SlashDot.org! http://sdm.link/slashdot >>> _______________________________________________ >>> Emc-users mailing list >>> [email protected] >>> https://lists.sourceforge.net/lists/listinfo/emc-users >>> > > ------------------------------------------------------------------------------ > Check out the vibrant tech community on one of the world's most > engaging tech sites, SlashDot.org! http://sdm.link/slashdot > _______________________________________________ > Emc-users mailing list > [email protected] > https://lists.sourceforge.net/lists/listinfo/emc-users ------------------------------------------------------------------------------ Check out the vibrant tech community on one of the world's most engaging tech sites, SlashDot.org! http://sdm.link/slashdot _______________________________________________ Emc-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/emc-users
