YT204001-JT YXU169F | ABB Speed Measurement Board

The SMB is located in the robot. The SMB does not have any LEDs located on it.The SMB reads the resolvers feedback and converts the analog voltage into a digital signal. Then the SMB converts the digital signal into a serial communication.The position of all six (6) axes resolvers are communicated to the robot computer every .5msec.The SMB can be checked most thoroughly with an Oscilloscope. The signals to check for are the Serial Data Out (SDO) and the Serial Data In (SDI). Another signal to check would be the exciter signal going to the resolvers. Use the Oscilloscope to check for proper amplitudes and ensure that there is no noise on these lines