Let me know if there are questions. The pattern in C channel is repeating (transition 1-6 and then 7-12, 13-18 and 19-24). There are 4 such pieces per full motor revolution and that is 8-pole motor, so there are 4 electrical revolutions per full motor revolution, which means that each of those pattern pieces correspond to 1 electrical revolution. And each of those pattern pieces has 6 different stages in it just like with Hall sensors. And no, it does not need to be sampled very often. Just like with Hall sensors - that info is needed only on startup to get the phase alignment. The difference is that Hall sensor signal is obtained when motor is at standstill. For the C channel the motor needs to move at least 4 encoder pulses to determine the section of the pattern. But the docs in that forum thread tell that encoder is emulating motion of 8 pulses forth and back for this exact purpose.
Viesturs piektd., 2024. g. 26. jūl., plkst. 20:19 — lietotājs Nicklas SB Karlsson (<n...@nksb.eu>) rakstīja: > > The information in the link might be useful for me. Though do not fully > understand the signal pattern, at least yet. > > Implement in software I however guess signal have to be sampled very often > and this would eat to much execution time. > > Nicklas Karlsson > > > tis 2024-07-23 klockan 23:15 +0300 skrev Viesturs Lācis: > > Hello! > > > > Next stop in my quest of Biesse retrofit after having 8i20 move those > > Yaskawa motors is getting the Yaskawa encoders read directly by Mesa > > boards. Seemed like a quick and easy task since those are 5V > > incremental encoders but not really. > > > > I posted my problem here with some pictures and a link to youtube to > > show how that encoder signal is seen in LinuxCNC: > > https://www.forum.linuxcnc.org/27-driver-boards/53321-yaskawa-incremental-encoder-and-mesa-7i48 > > > > Like I mentioned there, all I am missing is and index signal for bldc > > module - it is provided by Yaskawa servodrive but I cannot see it > > directly, so I would like to understand what are my current options > > besides keeping the original drives in cabinet just as an encoder > > signal converter. > > > > Viesturs > > > > > > _______________________________________________ > > Emc-users mailing list > > Emc-users@lists.sourceforge.net > > https://lists.sourceforge.net/lists/listinfo/emc-users > > > > > _______________________________________________ > Emc-users mailing list > Emc-users@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/emc-users _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
