Piezos are suitable for fast switching, as they offer electromagnetic quietness, good repeatability, high reliability and fast speeds. However, fast acceleration can mean recoil forces excite vibration in the pipette and both piezo and stepper actuators have suffered from these in the past, causing unwanted, repetitive solution switching for many milliseconds. Engineers at Siskiyou and PI (Physik Instrumente) have now teamed up on an approach which eliminates ringing in the pipette and the associated unwanted solution-switching. The system was recently presented at the 2010 Society for Neuroscience Annual Meeting in San Diego, CA.
Eliminating unwanted switching, yielding crisp, artifact-free data, Siskiyou’s MXPZT-300 integrates PI’s high-speed flexure guided piezo nanopositioner with a convenient, stable coarse positioning stack. Patented Input Shaping vibration-canceling technology nullifies the repetitive switching. Piezo movement is controlled by input from popular recording amplifier equipment. The MXPZT-300 controller incorporates all electronics and provides connectivity to popular electrophysiological equipment from respected manufacturers.Yvonne Klöpping