Hello! I am doing retrofits of 2 Biesse CNC machines/ They have Yaskawa CACR-SRnnBE12G-E servodrives and I am getting different error messages about "main circuit voltage error" and similar (A.03, A.20 and A.40 if anyone wants to know details) and in the manual's troubleshooting section all of them have "replace servopack" as the suggested solution.
There are brushless AC servo motors with quadrature encoders. Motor rated power is 2 kW, 1.5kW and 0.75kW I am looking for replacement servo drives. I was thinking about Mesa 8i20, but am not sure if I can get it to work properly with only encoder feedback (I have some experience with getting the BLDC component to work, but servos on my router have hall sensors that made the init process a lot easier). There are few places in manuals that mention 8i21. Is it available? What motors is it meant for? Is there any not-too-expensive alternative I could use? I really would appreciate something with pid autotuning. And one more totally unrelated question - I would like to acquire 3phase to 1phase AC converter. I have 12kW solar inverter with 3 phase output and heatpump with 1phase input (there is 25A fuse so that would be 220V*25A = 5,5 kW power) and that does not allow me to optimize on self-consumption - I want to modulate heatpump's consumption based on inventer's production (they both have I/O for this purpose). I found out about Scott transformers but that will have 2phase output that I have to load equally. Should I use a cheap off-grid solar inverter and feed 3-phase rectified DC to inputs? I am sure I am not the first with a similar issue, there must be some simple solution. Viesturs _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
