Random Notes on Yaskawa Sigma 5 and 7 Motors and Drives

For some reason there is not much info on Yaskawa motors and servopacks, so I found getting to know their features and finding spare parts was a bit of a slog. This page is to share a few of the things I discovered along the way, maybe it will help you save some time, compared with the days of testing and research I had to do!!

  • CN8 Safety Jumper Plug – the Yaskawa part number for this is (I think) JZSP-CVH05-E. The plug itself is TE connectivity 2013595-1, but as a jumper requires two sets of pins connected, I think 3 to 4, and 5 to 6,  see 4.6.1 in the manual.
  • I bought an SGD7S servopack that was missing all connectors, including the main power plugs that slot into the servopack. They were a nightmare to track down, and even after finding what they it was a struggle to find anywhere I could actually buy them. Specifically, they are TE connectivity again, from their Dynamic series, I think the D3900S spring clamp, but others like the D3950 might fit, the mounting dimensions appear to be the same…. you might have more luck with TE part numbers though, like 1-2013522-3 seems to be for both the 10 and 3 pin connectors, and 1-2013522-0 the 10 pin (note the common PN in the middle). Alternatively both, with the above safety jumper, are included in Yaskawa pack Y-05481-2. I found a digikey product that “seems” to be right?! But with $30 shipping from the US to the UK no thanks… I’ll just use my own push on plugs, it’s going in a cabinet anyway….
  • Tuning-less function has it’s limits – I needed precise positional control on a rotary axis, but found it lagged slightly. Curiously, when I ran auto-tune for position, and then went back to tuning-less, the motor had a bad time – lots of grumbing, grinding, vibration noises when accelerating and decelerating, and jumpy motion. I discovered this was a setting under Pn140 for “Use Model Following Control” that had been switched on by auto-tune. Switching it off gave smoother motion again.
  • Servo-packs seem to be universally compatible with older motors. So Sigma 7 servopacks like the SGD7S are indeed compatible with Sigma 5 motors like SGMJV – I called Yaskawa to check, and have this pair running now. Note that this is done by the servopack querying the encoder for the motor model, it needs to know this to adjust settings. This does however mean that compatibility does not flow in the other direction, ie a Sigma 5 servopack would NOT recognise a Sigma 7 motor.
  • Sigma-5 servodrives all say 3 phase on the label, but lower power ones CAN take single phase 230V, if you check the manual on page 3-12, section, although it advises some derating in performance. Quote:
    • “The following models support a single-phase 200-V power input.
      SGDV-R70A, -R90A, -1R6A, -2R8A, -5R5A
      When using the SERVOPACK with single-phase, 200 V power input, set parameter Pn00B.2 to 1.”
  • Sometimes, when looking second hand, you will find part numbers that don’t appear to be documented, at all, with e.g. design revision numbers which are simply not detailed in the manual. The best way I have found to discover what they mean, is to search for the model e.g. SGD7S and then “EU Declaration of Conformity”, or “EC Declaration of Compliance” if that doesnt work. Inside these documents you’ll find a complete and comprehensive breakdown of part numbers – here is an example.

Want to share something you’re learned about Yaskawa motors? Comment below!