Libra is a new line of vectorial drives characterised by innovative performance; these drives allow to command stepper motors with a drastic noise reduction, less heating and extremely smooth movements. Suitable for driving 2-phase hybrid stepper motors, they can be coupled mainly with the series of motors from Nema 8 to Nema 34. Completely digital and made using Arm Core M4 technology, Libra drives offer exceptional reliability combined with mechanical compactness and a competitive price. They can be used in many types of machines where there is already a controller for the generation of digital clock & direction signals, such as X-Y tables, labelling machines, laser cutters, pick-place devices, engraving tables, etc. and they are recommended in all applications in which not only versatility, precision and speed are required, but also smooth and silent movements as in the medical field.

Principal features

  • Sensorless motor stall detection
  • Integrated diagnostics
  • Motor short-circuit protections, open phases, over and under voltage and temperature
  • Vectorial control: the sinusoidal regulation with‘Else’ technology keeps the motor torque constant, allowing smooth and silent movements
  • Open and Close Loop
  • Smooth movements
  • Compact size
  • Silent rotation
  • Reliability
  • Low EMC emissions
  • Software resonance damping
  • Auto-tuning of the motor control parameters
  • High efficiency current regulation
  • Reduction of motor temperatures
  • Digital inputs from 2 to 24 Vdc
  • Fast and easy installation


Control modes:
  • Setting of the current value by means of dip-switches
  • Selection of the step angle by means of roto-switches. In order to maintain compatibility with traditional drivers, step angles have been emulated through software, the current regulation is always sinusoidal.
Possibility to select five user functions:

  • Enabling of motor stall detection. Reading the motor BEMF, Libra drivers detect without encoder the step loss, showing alarm status with the Fault digital OUT and a LED sequence.
  • Step/Direction or Clock-Up / Clock-Down control mode.
  • Enable input management (safety control).
  • 30% or 70% automatic current reduction (still motor).
  • enabling of “Clock Test” function, useful during the driver’s installation, which shows the right presence of the clock signal through status LED flashing.


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Contact us
Switzerland - Global HQ

Via Prè d’là, 1
CH-6814 Lamone, Switzerland
Phone: +41 (0)91 612 85 00
Fax: +41 (0)91 612 85 19

Delta Line North America, Inc
DTC Tech
4600 South Syracuse, 9th Floor
Denver, CO 80237, USA
Phone: +1 303 256 6212

Changzhou Delta Line Trade
Company Limited,
414 Building 1,
FuChen HuaYuan
New North District Changzhou,
Jiangsu, China

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