使用L6470芯片无法可靠地感知失速

我已经非常成功地使用嵌入式ARM处理器控制L6470步进驱动器芯片，以实现除无传感器失速检测功能之外的所有功能。我希望我错过了一些东西，有人可以向我指出这一点。我一直在这个论坛上，我可以看到每一块ST文档。


当我试图检测失速时，检测阈值似乎非常敏感;在一个电流设置下，芯片检测到任何停顿，并且在下一个失速阈值电流增量时，芯片显示停止。这几乎使该功能无法使用，所以我没有使用它。我真的希望能够使用这个功能，因为我们不能把编码器放在任何地方。此外，这是我们选择驱动芯片的一个原因，如果我们不能使用该功能，那将是令人失望的。

我错过了一些明显的东西吗除了L6470数据表中包含的内容之外，是否有更多关于此功能的文档？

谢谢，
韦恩



以下为原文





I've been quite successful at controlling the L6470 stepper driver chip from my embedded ARM processor for all features other than the sensorless stall detection feature. I'm hoping that I'm missing something and that someone can point that out to me. I've been all over this forum and every scrap of ST documentation I can get my eyes on.


When I try to detect stalling, the detection threshold seems to be very sensitive; at one current setting the chip  detect any stalls, and at the next increment of stall threshold current the chip  shows stalling. This pretty much makes the feature unusable, so I'm not using it. I would really like to be able to use this feature, since we can't afford to put encoders everywhere. Also, it's one reason we picked the driver chip, so it will be disappointing if we can't use that feature.

Am I missing something obvious? Is there more documentation around this feature other than what is contained in the L6470 datasheet?

Thanks,
Wayne