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Conduct Research Top

  • Stepper Motor Control Using the PIC16F684
    stepping motor is rated at 1 amp, winding is powered while the current in the other wind- then modulating a 5V supply across the winding at 50% ing is gradually dropped to zero, reversed, and then will result in a current of 1/2 amp (assuming a low ramped up again. This sequence is then repeated
  • April 21, 2009 - Wind-turbine drive takes the prize at Hannover Fair
    of simple ac drives for permanent-magnet motors up to 7 kW. Used with permanent-magnet ac motors without speed sensors, the AC650S Series reportedly offers energy savings and a more-compact size compared with conventional systems based on induction motors. Target applications include fans, pumps
  • Go for a walk?
    . The springs are rectangles measuring 3 X 24 X0.25 in., and can store up to 300 J. The springs, like human muscle pairs, are set up in antagonism, pulling against one another and always in tension. This pretension, which simulates leg stiffness, is controlled by the third motor. The springs are
  • Synchronizing
    buildup causes axes located farther away to increasingly lag the master axis. A result is that jerks and oscillations can take place as the web comes up to speed, so that remote roller stands do not come up to speed at the same time as the master. Web material produced during such intervals may
  • How to deal with crackpots
    Sacramento. Galil has been making motion controllers for some time, long enough that some of its equipment winds up on eBay. So it often fields calls about products that haven't been in its catalog for years. The fun starts when a backyard mechanic gets hold of an old Galil motion board and quickly
  • Eliminating compliance in servosystems
    and the amount of wind up or torsional stiffness required. An alternative to the traditional coupling method is a direct drive. A direct drive is an integral component that reduces compliance by installing the rotor assembly and feedback device directly on to the lead or ball-screw shaft. In other words
  • "Air " on the side of smoothness
    to maintain it. A motor-driven ball screw pushing a slide, for example, winds up before moving. Eventually the slide overcomes static friction then tends to overshoot the target. This stick-slip action is most pronounced in plain-way systems, though rolling-element bearings suffer from it as well
  • Medical Device Link .
    , zirconium oxide, and ZTA ceramic. Able to withstand high temperatures without suffering from thermal shock, these materials offer strength, toughness, wear resistance, and biocompatibility. A company supplies a line of zero-backlash, low-wind-up, bellows-type flexible shaft couplings in stock sizes from

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