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June 17, 2010
about 4 months ago
What mode are you using? I’ve got this weird problem I’m dealing with where the AutoDriver seems to work in modes 0 and 3 intermittently, but not perfectly in either mode. The way I interpret the datasheet, it should be mode 0, but all sample code indicates mode 3, so I’m obviously confused by something.
I don’t know if you’re using an SPI lib or bitbanging, but it seems that your only option is to have logic in your write() method that checks the mode and sets the idle clock value appropriately, and clocks in and out data according to the mode.
Sorry for this dumb question, but how did the stepper move after you sent the command? Did it move, and if so, do you know if it moved correctly? You could have one or more phases hooked up incorrectly. If kval hold isn’t doing anything when you increase it, the only thing that comes to mind is phase wiring.
SW should be pulled low for commands like GoUntil and ReleaseSw to work.
about 8 months ago
Anyone have trouble reading data out of the BlinkM? I’m trying to read the firmware and just get back 0xFF, 0xFF, where I should be getting back ‘a’, ‘a’. I am using the broadcast address 0x00, and sending the ‘Z’ command, then reading back two bytes.
about 9 months ago
Craig / Cyrus, I ended up writing an app where I could use sliders during motion commands to change the Kval values on the fly. I don’t really have a good understanding of the values yet, though that’s on my list of things to do, hence the temporary approach.
I can’t verify your statement about stopping on full steps. Can you point me to the exact page in the datasheet? I’ve read it twice and maybe I’m just blind… Thanks!
The communication protocol for changing colors and brightness is absent.
about 2 years ago
Anyone get the L6470 to run without constantly reporting stall errors on A and B?
about 2 years ago
Anyone having trouble setting the dynamic range to 8G? I have comms working, and can verify the device ID and read data. However, my data is always coming in with a 2G dynamic range, even when I set XYZ_DATA_CFG to FS1.
about 4 years ago
Does anyone know the part # of the LED used in this board? I’d like to get manufacturer’s maximum current spec.
We just measured the current through this LED bar and it’s more like 17mA. We measured 70mA across 4 of them @ 12.4V, and 17mA across one.
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