Hi,
We bought a RX28 and a power supply to the Dynamixel bus (http://robosavvy.com/store/product_info.php/products_id/505). We're connecting both the computer (through its RS485 serial port) and the RX28 to the power supply board (which is correctly powered).
The problem is I can't communicate with the motor at all. I tried the lib_robotis.py (I found it here http://www.hizook.com/blog/2010/03/14/robotis-dynamixel-servos-overview-applications-tear-down-and-open-source-software). I also tried directly sending the ping message in hex through the serial port. But I don't get any answers from the motor. Any ideas?
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When powering the board, the motor flashes once in red. Is that normal?
Cheers,
Ugo
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![[레벨:30]](http://www.robotis.com/xe/modules/point/icons/default/30.gif "포인트:8122985point, 레벨:30/30"){kind=icon}
ROBOTIS
Hi Ugo,
Please note that if the LED blinks/flashes once, this is normal.
If the motor does not move after the power is supplied, it looks like you may have an error in the setting or packet sent.
The default for the RX-28 is 57600bp and ID is 1.Check your communication speed and ID.
We recommended using the USB2Dynamixel when connecting the Dynamixel and computer.
Other usb-serial products may not support the communication.
http://support.robotis.com/en/techsupport_eng.htm#product/auxdevice/interface/usb2dxl_manual.htm
For more information on communication, please refer to the link below.
http://support.robotis.com/en/techsupport_eng.htm#software/dynamixelsdk.htm
ROBOTIS