Hillsboro, Ore.— SpindleBlok Drive Module (SDM) versions are now available for use with ac induction, brushless servo and brushless dc motors. It runs virtually any three-phase motor from 1 to 20 hp without a sensor. SDM can be interfaced with machine mounted operator stations (0-10 V dc) or PC machine controllers (±10 V dc). Dynamic velocity performance is derived from the company's 400 µsec velocity loop update rate and 1.5 msec torque response, allowing it to deliver 100:1 constant torque-speed range and up to 5:1 field weakening speed range. SDMs are available in sizes from 1 to 27 amp rms and cover all voltage input mains from 110 to 480 V ac. www.semipower.com Semipower Systems Inc