Miscellaneous Drawings

Encoder Buffer, EL-2260
Page last updated: May 14, 2002

The encoders attached to the servo motors only provide single-ended signals which can be noise sensitive. To provide more reliability in motor positioning, these signals are converted to differential signals with the drivers provided on this card. This is a small board that resides inside the stage interconnect box for each servo stage. It has two connectors. P1 connects to the internal terminal strip in the interconnect box where it receives power and sends it's output waveforms. P2 connects directly to the motor encoder using the same pin-out as the encoder. The driver is a standard DS3487 (RS-422) driver. The power to the board is filtered by L1, C1 and C2.