I have a project in which the customer desires to use a linear motor to drive a pick and place unit over 16 feet of travel. The normal position feedback device is a linear incremental tape scale ala Renishaw / RSF. They want absolute feedback to eliminate homing AND true positional accuracy of .002" over the 16 feet of travel. Speed is moderate, peak of 2 meter/sec, accel of 1 g. I have used Temposonics in past and but am concerned about it's accuracy over this distance. Can anyone suggest another technology / brand to investigate? I need to be able to provide an incremental pulse stream to the drive for velocity feedback and am open to dual looping with tape scale and absolute device.