Robust Lexium MDrive® Pulse /Direction products integrate 1.8° 2-phase stepper motors with onboard control electronics and hMT closed loop performance. Products have 4 modes of operation: pulse/direction input, variable speed control, constant velocity drive, and variable torque control.

Communications interface

The LMDxP uses an isolated RS-422/485 communication interface with selectable BAUD rate ranging from 4.8 to 115 kilobits per second via a standard 9-pin D-subminiature connector. An optional USB to RS-422/485 Comm converter with cable is available and is compatible with all 32 and 64 bit operating systems.

Power and I/O

DC power and the I/O are interfaced via robust locking connectors: a 2-pin screw lock connector for power, and a pair of 7-pin spring-clamp terminal blocks with side-locking tabs for I/O.

The isolated I/O bank consists of +5 to +24 VDC inputs for step, direction and bridge enable/disable, one (1) 5.5 mA Attention output, a 12-bit analog input and six TTL level differential encoder outputs, which are not isolated. The clock and direction inputs may be programmable to multiple clock types in software, either pulse/direction, quadrature or CW/CCW.

Selectable modes of operation

Unlike traditional pulse/direction devices, the Lexium MDrive Pulse/direction input may be configured to operate in the following modes of operation:

  1. Pulse/direction mode: The LMDxP will perform motion in response to step clock and direction signals on the inputs.
  2. Speed control mode: The LMDxP will intelligently control the axis velocity based upon parameter configuration in software and a signal applied to the analog input.
  3. Torque control mode (Closed Loop Only!): The LMDCP will intelligently control the shaft torque based upon parameter configuration in software and a signal applied to the analog input.
  4. Constant velocity mode: The LMDxP will intelligently control the axis velocity based upon parameter configuration in software and the value of a slew at velocity command sent over the RS-422/485 interface.

Software

The Lexium MDrive Pulse/direction uses the powerful, yet easy to use Pulse/direction Configuration Utility which is part of the Lexium MDrive Software Suite.

The Pulse/direction Configuration Utility is used to set all the available parameters of the LMDxP and can be used in either basic or advanced modes. Basic, for standard pulse/direction functionality with basic parameters, or Advanced, for configuring hMTecnology and advanced operating modes.

Catalog & Specifications
Lexium MDrive Pulse/direction Datasheet 

User Guides
Lexium MDrive Pulse/direction Hardware Manual NEMA 17 
Lexium MDrive Pulse/direction Hardware Manual NEMA 23/34 
Lexium MDrive Software Suite Manual 

Drawings
Nema17 1-Stack Lexium MDrive (stp)
Nema17 2-Stack Lexium MDrive (stp) 
Nema17 3-Stack Lexium MDrive (stp) 
Nema23 1-Stack Lexium MDrive (stp) 
Nema23 2-Stack Lexium MDrive (stp)  
Nema23 3-Stack Lexium MDrive (stp)
Nema34 1-Stack Lexium MDrive (stp)
Nema34 2-Stack Lexium MDrive (stp)
Nema34 3-Stack Lexium MDrive (stp)

Software
Lexium MDrive Software Suite 

 

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