On Tuesday 24 January 2017 12:47:01 Jon Elson wrote: > On 01/24/2017 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 $$$. > > Toothed belt drives don't add backlash, until the belts are > badly worn. (On a hobby system, you will NEVER wear them > out.) No, you don't need much reduction, and with a > suitably-sized motor, no reduction is needed. Note that > stepper motors are rated on holding torque, and they will > not even produce that much when running at low speeds. > Servos draw no current at no load, and can stay cool so they > have a reserve or peak torque available. The torque peak > can often be 4 - 6 X the continuous rated torque. So, a > motor rated at 100 Oz-In continuous could easily deliver 400 > Oz-In peak for a few seconds. > > Jon
Thats a consideration I hadn't plugged into my train of thought Jon, thanks. 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> ------------------------------------------------------------------------------ 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
