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Hi,
I just purchased and setup the DRV8711EVM board with the supplied stepper motor, and followed the manual instructions to get the stepper motor running. However whenever I would run the motor, it would only run for a few seconds before the motor would stop, the fault or stall LED would not light up, it would just stop. And if I read the faults from the basic menu it wouldn't show any faults. And if I tried to change any settings, or run the motor again, no response at all. It was as if it was disconnected, even though the status LED was still flashing and the "hardware connected" message was still showing. I had to power cycle everything, including the GUI to get it working again. After 3-4 times of doing this, I pressed start steps, the motor ran for a couple of seconds, then I pressed pause steps, the motor continued to run for a couple of seconds, then a big spark and smoke from the PCB. Upon inspection Q1 and R14 are fried. I don't understand what I could have done wrong? I had 24V DC supplied, the supplied stepper motor connected, and the preset configuration loaded supplied by TI.
Regards,
Nathan 
Hi Nate,
Thanks for posting on this forum and sorry you were having issues running the stepper out of the box. Because Q1 and R14 were fried during your tests please go ahead and return this damaged EVM for replacement from your point-of-sale vendor whether TI or one of our distributors.
Meanwhile I'm attaching an updated configuration file for use with this EVM and Stepper that came with it. Please follow this sequence for the replacement EVM. Connect the EVM to the computer. Power up the motor supply 24 V. First Reset the device using the GUI button. Green when reset.
Next release reset and wake up device. Widgets should appear as shown below.
Then load the attached configuration file using File > Open configuration menu. The motor should run normally when "Start Steps" button is pressed. It would be good to use a current limited power supply source for EVM bring up limiting to 2 or 3 A should be good to get started.
Regards, Murugavel
Hi Murugavel,
Thanks for the response and info, I'll give that a go when I get the replacement. I've started the process of returning it however they sent me the following message:
