I've pulled a few servos off some equipment to. It is pretty easy to figure out the encoder resolution. Turn the motor by hand with a Crescent wrench on the shaft's flat and count the pulses. You only have to rotate the shaft through 90 degrees and then multiply by 4. Or if the cover comes off and you can see the disk inside just look and remember that 1,000 lines is about three lines per degree.
I very handly tool for this kind of work is a logic analyzer. ebay.com/itm/USB-SALEAE-24M-8CH-Logic-Analyzer <https://www.ebay.com/itm/USB-SALEAE-24M-8CH-Logic-Analyzer-24M-8-Channel-with-Buffer/233364033689?hash=item3655949099:g:DwAAAOSwmU9dnSwN> With on of these can can get an accurate count. You can see PMW signals and measure their duty cycle. Almost anything you can do with a 'scope but these work only on logic-level digital signals. They are worth 10X their asking price. Or just connect an LED to the wires can count flashes as you turn the encoder about 10 degrees On Sat, Jun 13, 2020 at 6:32 AM Lester Caine <les...@lsces.uk> wrote: > It seems I have a set of GYS701DC2 and mating servo drivers sitting in a > big metal box with a laser sitting in the top of it. I think it's due > for stripping down so I can salvage all the usable bits, but I've hit a > bit of a brick wall I can't find any data on the motors such as what > encoder they are fitted with. Anybody got an old manual as google is > proving lacking. > > While trawling around I cam across the JMC iHSV57-30-18-36 which looks > like a possible contender if I was starting from scratch. However once > again it does not list the resolution of the encoder, playing instead on > it's 'stepper motor' like setting. I've established that the built in > driver can handle any encoder from 1 to 2500 lines and it even lists > 1000, 1250 and 2500 as the 'standard' encoder resolutions, but not how > to recognise just which one is fitted :( In my book, the 2500 line > encoder gives a native 10000 step resolution without any > 'micro-stepping' and when combined with a 3mm pitch ball-screw ( on the > Taig mill ) looks like a magic combination. > > Anybody using the iHSV57-30-18-36 and worked out what the native > resolution is? ... any feedback as to if it's even worth concidering? > > -- > Lester Caine - G8HFL > ----------------------------- > Contact - https://lsces.uk/wiki/Contact > L.S.Caine Electronic Services - https://lsces.uk > Model Engineers Digital Workshop - https://medw.uk > Rainbow Digital Media - https://rainbowdigitalmedia.uk > > > _______________________________________________ > 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
