Check the listing for details. Objective Imaging Oasis 4i 4-Axis Controller Board. Condition: Used. Listed at 295.00 USD. INDUSTRIAL AND LABORATORY EQUIPMENT eBay Shop Add to favorites For any additional details, photos or expedited delivery please Call or click "Ask a Question" at the bottom/left of listing DESCRIPTION Here is an Objective Imaging Oasis 4i 4-Axis Controller BoardCondition: This Objective Imaging Oasis 4i 4-Axis Controller Board was kept as a good spare for Prior Scientific controller.Specifications:Stepper Performance Axes: 4 (Independently controlled)Micro-step resolution: 1/64 Full-step (0.028 degrees with 200 step/rev motor)Maximum speed: 512 KHz (micro-steps/sec), 8 KHz (half-steps/sec)Minimum speed: 32 Hz (micro-steps/sec), 1 Hz (half-steps/sec)Maximum motor current: 0.5A to 1.25A/phase in 5mA stepsMaximum motor supply voltage: +28V (typically +12V)Minimum motor supply voltage: +10VCommand overhead (Move XYZ):