Text version of the page

Stepper motor drivers USD series

20 xxx) enable the stepping motor to move at full or half step through the DIRECTION, STEP and ENABLE signals. The USD 10 xxx series use the same control signals but enhance the step motor resolution up to 1/128. Thanks to the possibility to change step resolution at any time (“at the fly”) without loss of position, i.e. with the motor still moving, it is possible to cover a wide range of speed maintaining the STEP input frequency at low value. The drivers coded USD The stepper motor drive modules of the USDxxxxx series have been designed to drive permanent magnet bipolar stepping motors. In plastic or metal housing they are suitable for circuit board assembling. High performance, compact sizes and cost effective are their main characteristics. The availability of twelve different models allows the application of the USD modules on many different kinds of machine. The power supply voltage range goes from 12VDC up to 85VDC and the current between 0.3A and 6A. Each model is provided with full short circuit protection (phase to phase, phase to ground and phase to supply), with over/under voltage and over temperature protection. A fault output allows to always monitor the driver conditions. A particular current control assures a proper driving of the motor in any condition, reducing resonances and heating. Automatic current reduction minimises heat losses when the motor is not running. Internal pull-up resistors on each input allow the use of the modules with the addition of a few external components. The twelve different models are split into three current sizes and four different functionalities. The simplest series (coded USD 60 xxx and USD 50 xxx have built-in indexer and they can be remote controlled by a simple serial link. They have a max step resolution of half and 1/128 respectively.
LAM Technologies www.lamtechnologies.com Viale Ludovico Ariosto, 492/D info@lamtechnologies.com 50019 Sesto Fiorentino – FIRENZE Tel. 055-4207746 – Fax 055-4207651 rev. 1.02 03/10/06