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Stepper Motor Control with dsPIC(R) DSCs
the PWM2 module) are used. to control a stepper motor in all possible ways, whether. The dsPICDEM MCSM Development Board was. it is bipolar or unipolar, using full step or microstepping,. designed to work with drive voltages of up to 80V and. open or closed loop, without the need for external
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Stepper Motor Closes The Loop Around Tough Moves
limitation of stepper motors is that they are designed for open-loop control. The driver is given a certain number of pulses to move the motor. However, excessive load or high vibration can cause the motor to lose synchronism with the input pulses and miss steps. A stepper motor misses steps because
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Motion Control
tachometer combinations FAULHABER recommends the LC302, 4-quandrant, linear controller. ARSAPE Stepper Drivers come in three versions, low and medium voltage and a current mode (chopper) drive, encompassing the full range of ARSAPE miniature DC stepper motors. Each series is available in three
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Digital Instrument Clusters for Cars and Trucks
instrument clusters gave way to other kinds of displays. For example, many gage instruments today operate from stepper motors controlled by embedded processors receiving data from automotive sensors. However, the instrument cluster is poised to undergo another radical shift with the removal of all moving
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Fast frame grabbers force wafer surfaces to reveal their secrets
. Print Edition. Digital Edition. eNewsletters. Advertisement. Community. Forums. Blogs. LinkedIN. Facebook. Events. View Upcoming Events. Advertisement. Related Content. Smooth driver eliminates stepper resonance problems. Fine alignment, synchronized measurements. Controls help harmonic spray do OK
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Low-power backlighting
. This provides one plug-in subassembly that completely illuminates the dial. Stepper motors that move the pointers can also mount on the subdial. If there's no requirement for a complete lighting subassembly, then EL and graphics-applique components can mount on the instrument cluster via alignment holes
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Servo Control of a DC Brush Motor
logic device (PLD), and a single-chip H-bridge driver. Such a system might be used as a positioning control-ler in a printer, plotter, or scanner.The low cost of imple-menting a servo control system using the PIC17C42 allows this system to compete favorably with stepper motor systems by offering
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Special ICs
. A general-purpose motion-control IC called the HCTL-1000 is aimed at dc, brushless dc, and stepper motors. The TTL-compatible chip is powered by a single 5-V power supply. Position and velocity control are provided by comparing the host computer-command signal with feedback data from an incremental encoder