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A Performance Stepper Drive with three options for OEM Applications. The ST series Stepper Drives feature Electronic Damping, Torque Ripple Smoothing, Command Signal Smoothing, Self Test and Auto Setup routines.

ST Features -

• Electronic Damping - stepper motors have a tendency to "resonate" at some drive frequencies so to counter this the ST series drives, by entering some system data, can calculate and apply a damping term into the control algorithm. This significantly improves midrange stability and allows the motor to achieve higher speeds making more use of the its available torque.
• Torque Ripple Smoothing - again all stepper motors have an inherent low speed torque ripple that can effect the motion of the motor. By analysing this torque ripple, the ST drive can apply a negative harmonic to negate this affect, giving the motor a much smoother motion at low speed.
• Command Signal Smoothing - dynamic smoothing can soften the effect of immediate changes in velocity and direction, making the motion of the motor less jerky. An added advantage is that it can reduce the wear on mechanical components.
• Self Test and Auto Setup - at start-up the drive measures the motor parameters, including the resistance and inductance and then uses this information to optimize the system performance. It also compares this information from the last start-up and checks to see if the motor data has changed (this could indicate a fault or system change). The ST series Stepper Drives can also detect open and short circuits, and incorrect motor wiring.

Drive options -

ST S  - Basic drive with Analog, digital and host command input
• Pulse & direction with electronic gearing
• Encoder following with electronic gearing
• CW and CCW pulse Velocity (oscillator) mode
• Multi-axis Si programming if used with a SiNet Hub
• Configurable Oscillator function for running at fixed speeds or with joystick
• SCL "Host" commands for real time control from a host PC or PLC using RS-232 or RS-485 serial communication

ST Si - Programmable for stand-alone operation
• integrated configuration
• Easily integrates with other devices on the machine (Sensors, PLCs etc)
• Easy to use Si Programmer™ Windows software including integrated tuning
• Graphical point and click format Combines motion, I/O, exception handling and operator interface functionality for simple machine sequencing

ST Q  - High level ASCII command set and programming language.
• Optional Encoder feedback, RS-485
• Flow control, Motion, I/O, Math functions
• Pulse & direction with electronic gearing
• Encoder following with electronic gearing
• Host interface while executing internal programs
• CW and CCW pulse, Analog or digital velocity (oscillator & joystick) mode, Analog positioning
• Multi-tasking, Register manipulation, Host interrogation, Exception handling (faults & interrupts)
• Sequences of commands can be stored in the drive to provide complex motion and machine control

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The STAC6 represents the latest developments in stepper drive technology, incorporating features that will derive the highest performance from today's stepper motors. Its Anti-Resonance and Waveform Damping control algorithms make it a clear market leader. The STAC6 High performance Stepper Drives like the ST series features Electronic Damping, Torque Ripple Smoothing, Command Signal Smoothing, Self Test and Auto Setup routines.

Drive options -

STAC6 S  - Basic drive with Analog, digital and host command input
• CW and CCW pulse inputs
• Optional Expansion I/O kit
• Pulse & direction with electronic gearing
• Encoder following with electronic gearing
• Multi-axis Si programming if used with a SiNet Hub
• Easy to use Si Programmer™ Windows software including integrated tuning
• Configurable Oscillator function for running at fixed speeds or with joystick
• "Host" commands for real time control from a host PC or PLC using RS-232 or RS-485 serial communication

STAC6 Si - Programmable for stand-alone operation
• Graphical point and click format combines motion, I/O, and operator interface functionality for simple machine sequencing
• Easily integrates with other devices on the machine (Sensors, PLCs etc)

STAC6 Q  - Comprehensive command set and programming language
• Optional Expansion I/O kit
• Pulse & direction with electronic gearing
• Encoder following with electronic gearing
• Host interface while executing internal programs
• Options for downloading, storing and executing multiple programs
• Q Programming environment - Multi-tasking, Math functions, Register manipulation & conditional processing

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The BLuDC Series Servo Drives provide compact, reliable solutions for a wide range of motion applications in a variety of industries. BLuDC Series Servo Drives are designed to offer excellent performance coupled with hardware and software features that make them easy to integrate, use, and maintain.

The BLuDC hardware features a powerful digital signal processor (DSP) coupled with an efficient MOSFET PWM amplifier. When combined with the BLuDC's sophisticated yet easy to tune current, velocity, and position loops, the result is a system capable of extremely high performance and the assurance of success in even the most demanding of applications.

DC Key features -
• Compact size
• Multiple control options
• Easy-to-use and set up through Quick Tuner application software
• Reliable: optically isolated I/O, digital protection circuits built-in, surface mount technology
• All-digital design means no trimpots or dip switches, all drive settings configured through software
• Selectable commutation (sinusoidal or trapezoidal) for a wide variety of motors including brushless, brushed, and linear servo motors
• This open frame model is also available as a packaged unit similar to the STac6 above

The SimStep integrated stepper motor controller provides a cost effective solution to a wide range of applications that require accurate manipulation of the driven mechanism. The unit is a "plug and run" package that greatly reduces installation time. Simply connect the SimStep intelligent drive to a PC, motor, travel limits etc and an AC mains supply using the cables provided and the system is fully operational. Suitable for 17, 23 and 34 frame size motors, Choice of RS232 or RS485 interfaces.

• Features -
• Plug and run simplicity
• Optional closed loop control
• Modular construction for improved serviceability
• Internal memory stores sequences for stand-line operation
• Programmable position, acceleration, deceleration and velocity
• 16 Programmable Digital I/O to interface with other process functions
• 400 steps per revolution motor resolution provides increased smoothness
• Motor torque ratings up to 1.5Nm with optional planetary gearheads to 100Nm
• RS232 or RS485 communication, up to 99 units can be daisy chained to a single port
• Integrated high efficiency Bi-polar drive stage with internally adjustable phase current from 0.5-3.5 Amps
• Integrated Power supply for direct connection to AC Supply with a choice of 115 or 230 Vac, 50 or 60Hz operation

The MSE422C is a 4 axis 0.6 A bipolar drive for permanent magnet and NEMA sizes 16, 17 and 23 stepper motors. This compact chopped constant current bi-polar drive conforms to the international extended 3U Eurocard standard and is ideally suited for use with the range of permanent magnet and 17HS series hybrid instrument motors together with the NEMA size 23 HS series hybrid stepper motors with current ratings up to 1.5 amps per phase. The ability of the MSE422C to operate with rail voltages up to 30 Vdc provides excellent high speed performance with a choice of full step or half step phase control when improved low speed and mid range stability is achieved. The MSE422C design provides fully independent control of 4 motors on a single 220mm Eurocard and is therefore ideally suited for use in instrumentation and scientific apparatus requiring a multiple axis drive capability.

• MSE422C Features -
• 10-30Vdc motor supply at 4A max
• Industry standard 220mm Eurocard format
• Selectable output current 0.6A max for each drive
• Selectable Full and Half step setting for each drive
• Clock, direction, motor off and power reduction input controls for each drive
• Potentiometer inputs for each drive for continuously variable current control

In the Series 13 range of Stepper Motor Drives, manufactured by our subsidiary company Alzanti, the PVP134 has been developed to meet the growing demand for high performance, cost effective, L/R drives. They have been designed to be compatible with the specifications of many permanent magnet and hybrid stepper motors up to NEMA frame size 34 and are therefore suitable for numerous applications. The PVP134 unipolar model can sink a maximum continuous motor current of 2 Amps per phase and the PVP134B bipolar model can sink and source a maximum continuous current of 2 Amps per phase. Motor phase currents are set by using series power resistors in the motor leads, and rail voltages as high as 30Vdc may be used. As standard the PVP134 series drives can operate in either full or half step mode and control is achieved by conventional pulse and direction inputs. Optional extras include a simple on-board oscillator for manual speed control and 5Vdc input configuration for easy interfacing to microprocessor and other low voltage logic circuits.

• Features -
• 15-35Vdc Motor supply
• Separate 15-35Vdc Logic supply
• +12Vdc auxiliary supply output
• Industry standard Eurocard format
• Unipolar and Bipolar models for 4, 6 and 8 lead motors

2.0A 24V bipolar Eurocard drive for use with NEMA sizes 17 and 23 motors, includes a voltage controlled oscillator for off line use. Built on the 3U high International standard extended Eurocard format, the PM542 features a particularly slim profile for optimum space utilisation. With a front panel width of only 34mm (7E) up to 12 units can be fitted in a single 19in standard Euro-rack. The ideal choice for small hybrid motors, with adjustable current from 0.5-2 amps per phase, combined with chopped constant current drive technology which enables current forcing from supply voltages up to 30Vdc. The unit provides high efficiency and optimum performance characteristics when using NEMA size 17-23 hybrid stepper motors. The design of PM542 is based on many years experience in stepper motor drive technology and incorporating many features to provide flexible control.

• Features -
• Selectable full or half step phase logic control
• Control from external clock and direction signals
• Adjustable current settings from 0.5A to 2 Amps per phase
• Opto-isolated "Drive healthy" status output and control inputs
• Over-temperature monitor with selectable automatic drive shutdown
• High efficiency chopped constant current power stage for increased performance and reduced current consumption
• Choice of automatic or externally selectable reduced current operation for stationary motor conditions to even further reduce power consumption and motor heating
• Alternative control using on-board voltage controlled oscillator featuring externally gated adjustable base and high speed settings, adjustable acceleration / deceleration ramping. Choice of oscillator gating procedures to suit alternative control philosophies. Automatic ramping and controlled motor reversal eliminates motor stalling when high speed direction changes are required

The PVP192 Stepper Motor Drive Module, manufactured by Alzanti, has been developed to meets the growing demand for high performance, cost effective, bipolar drivers. It has been designed to be compatible with the specifications of many types of stepper motors with 4, 6 or 8 leads, and is suitable for numerous applications. PWM current regulation on the PVP192 provides very efficient use of input power and extends the useful speed range of motors whilst reducing heat dissipation in the drive. The PVP192 delivers a maximum continuous motor current of 2 Amps per phase. Motor phase current is fully adjustable via an on-board potentiometer, this in turn allows a wide range of motors up to NEMA frame size 23 to be driven, at voltages up to 36Vdc in a small unit size with integral heatsink for a compact overall system design. All control signal inputs have uncommitted opto isolators, making interface possible to a wide range of PLC's and other control equipment. Other standard features include: Full/half step mode, over temperature protection, standby motor current selection and output stage disable function.

• Features -
• 12-36Vdc Motor supply
• 0.05-2 Amps motor current
• Separate 12-36Vdc Logic supply
• Sized 89mm x 38mm x 76mm, 180g weight (typical)
• 5, 12, or 24Vdc uncommitted opto isolated controls

The MSE570 "Evo 2" is a low cost high performance Eurocard Bi-polar drive designed for mounting in 3U high Euro-racks. Ideally suited for use with NEMA size 17, 23 and 34 stepper motors, the unit provides a wide range of current options. Designed for use by original equipment manufacturers, the unit provides a reliable and economic in-service proven drive solution. The MSE570 design enables users to customise their unit to meet their exact requirements by providing a series of up-grade options which can easily be implemented. Featuring a chopped constant current output stage the MSE570 Evo 2 meets the requirements of virtually any 2 or 4 phase hybrid stepper motor in the NEMA 17, 23 and 34 frame sizes. The use of chopped constant current drive techniques combined with the latest developments in power stage technology results in significant advances in efficiency, furthermore, the output current may be reduced via an external input when the motor is at standstill to reduce temperature rise in the drive and the motor. The MSE570 Evo 2 drive is designed for use with rail voltages from 15-48 Vdc such as our MSE173 supply range where upto 7 drives can be incorporated in a single 19in rack together with the power supply. For high speed operation the MSE562 and MSE875 power supplies are recommended for single and multi axis applications depending on the motor current settings.

• Features -
• Increased operating voltage up to 48 V
• +5V and +12Vdc auxiliary supply outputs
• ½ step drive option for improved damping
• Increased efficiency, no heatsink required
• Reduced panel width (7HP), more drives in a rack
• Operates from external clock and direction signals
• Standard thermal protection and condition monitoring
• Status LED’s for continuous condition monitoring of the drive
• Suitable for size 17, 23 and 34 frame size hybrid stepper motors
• Bipolar drive with pre-set drive currents up to 3.5 Amps per phase
• Single rail supply for both logic and motor simplifying power requirements
• Optional on-board oscillator circuit can be added for simple manual or PLC interfaced control
• Optional matched motherboards (MSB630 and MSB870) for connection via solder free terminals

Built on the 3U high international standard extended (220mm) Eurocard format, the PM546 utilises surface mount technology for optimum space utilisation and reliability. With a panel width of only 34mm (7E) up to 12 units can be fitted in single 19in standard Euro-rack. The PM546 is an ideal choice for NEMA size 34 hybrid motors and has adjustable current settings from 2.5-6 amps per phase. Combined with chopped constant current drive technology enabling current forcing from supply voltages up to 85 Vdc, the PM546 Stepper Drive provides high efficiency and optimum performance characteristics when using size 23 and 34 hybrid stepper motors. The PM546 design is based on many years experience in stepper motor drive technology and incorporates open circuit and short circuit protection with integral oscillator.

• Features -
• Front panel mounted status indicators
• Selectable full or half step phase logic control
• Control from external clock and direction signals
• Single supply rail simplifies power supply requirements
• Adjustable current settings from 2.5A to 6 Amps per phase
• Over-temperature monitor with selectable automatic drive shutdown
• Opto-isolated control inputs "Drive Healthy" status output
• Short circuit and open circuit protected power stage for increased reliability
• High efficiency chopped constant current power stage provides increased performance and reduced current consumption
• Choice of automatic or externally selectable reduced current for stationary motor conditions to reduce power consumption and motor heating
• Alternative control using on-board voltage controlled oscillator featuring: externally gated adjustable base and high speed settings adjustable acceleration / deceleration ramping. choice of oscillator gating procedures to suit alternative control philosophies. automatic ramping and controlled motor reversal eliminates motor stalling when high speed direction changes are required

In a 3U high international standard extended (220mm) Eurocard format, the PVP2460 Bipolar Stepper Drive utilises chopped constant current circuitry capable of 2-6A per phase and has overload, low logic supply, short circuit between phases and thermal protection. It is suitable for driving hybrid or permanent magnet motors with 4, 6 or 8 leads in NEMA sizes 17, 23 and 34 stepper motors in full and half step modes. Options available of "on board" oscillator and micro stepping adapter board.

• Features -
• 20-70Vdc Motor Supply
• Standard extended Eurocard format
• Selectable current ranges from 2-6A
• +5V and +12Vdc auxiliary supply outputs
• Overload and short circuit between phases detection for increased reliability
• Output stage disabled on low Logic supply detection

With its superior motion control algorithm developed to meet the most demanding accuracy requirements the Mclennan Digiloop PM600 motion controller enables unparalleled motor control and accuracy to be obtained. Its low unit cost facilitates economic control unlike any other motion controller. This single axis controller is able to achieve much tighter loop control resulting in zero error. This, combined with the Digiloop algorithm results in superior smoothness, stability and positional accuracy, even when remotely mounted high resolution encoding is employed. Where the sequential control of two axes is required however, a single Digiloop PM600 may be used to control two motors. Its compact size ensures that even where the control of multi-axis systems is required the Digiloop PM600 remains a space efficient and economic solution. In such systems the required number of controllers are simply linked together via RS232 or RS485 thereby providing the ultimate flexibility and maximum up-grade potential.

• Features -
• Maximum positioning range +2,000 Million counts
• Auto-tune and self optimisation of servo constants
• Digital output for use with stepper and digital servo drives
• Programmable base speed and independent creep or distance to target position
• Maximum acceleration rate of > 20,480,000 counts per second for a 20 msec. motor time constant
• Analogue output to control servo motors using "Digiloop algorithm" for increased accuracy
• Digital control with maximum operating speeds of > 409,600 counts per second for use with 6,000 rpm servo motors equipped with high resolution encoder or resolver feedback
• Stable positioning using direct monitoring of high resolution encoders equate to rotary resolutions and repeatability of 0.05 milli degrees or linear resolutions of 0.1mm
• Alternative constant velocity operation
• Electronic gearbox, Electronic cam, Flying shears
• 1 1/2 axis to control 2 servo axes sequentially

• Programmable I/O -
• Emergency stop input
• Direction sensitive limits
• Datum inputs for accurate zero positioning
• User definable programmable optically isolated 16 digital I/O
• Analogue I/O for use with load cells, temperature and volumetric transducers etc
• Manual jog inputs with programmable jog, slow and fast rate control and optional joystick interface

• Communication and Programming
• Multi Axis communication
• Multi-sequence capability for off-line operation
• Optional local display panel of position or speed
• Choice of RS232 daisy chain or RS485 multi-drop link
• Simple control language needs no additional software
• Standard screen editor for developing motion programme

Multi-channel RS232 interfaced motion controller for up to 8 stepper motor driven axes. The PM608 multi channel motion controller provides a multi channel control capability for use with stepper motor and digital brushless servo systems and provides a low cost solution to a variety of scientific, measurement and industrial motion control applications. The PM608 Eurocard unit which is ideal for large system integration is provided with software to sequentially control up to 8 motor channels and is available with a matching motherboard to simplify installation in rack mounted systems. Communication with the unit is via an RS232 or RS485 interface, or manually via the JC800 manual jog box providing remote manual control of all 8 motion control channels.

• Key features as the PM600 (above) with -
• High speed positioning of up to 8 motor channels
• On-board memory for 8 separate motion sequences
• Programmable linear acceleration / deceleration ramps
• On board memory for each motor's channel parameters
• 8 Channels of Datum inputs for accurate zero positioning
• Maximum acceleration / deceleration rates > 2,000,000 cps./s
• Independent Direction sensitive limits for up to 8 motor channels
• 8 Channels of digital output for use with stepper and digital servo drives
• Dedicated inputs for datum and over-travel limits for each motor channel
• Independently programmable sequential motion of up to 8 motor channels
• Maximum operating speeds > 409,600 counts/sec. for use with high resolution motor systems
• Independently programmable acceleration / deceleration, speed and position for each motor channel

The SM9000 Series Stepper Motor Systems are fully cased units for single or multi-axis motion control systems and are suitable for stand-alone or integration in process control systems. With the same modular system flexibility as our DC and Hybrid control systems, but populated for stepper motor control with high performance bipolar drives, incorporating power supply and PM600 / PM608 digital motion controllers. Robust EMC compliant enclosures with fan cooling suitable for free and rack mounting. Bespoke systems design is available from one to hundreds of axes in free standing rack and enclosures. The SM9000 Series Stepper Motor Systems are available in two build levels depending on customer requirements.

• Level B build standard - Packaged Systems. Units supplied in this form are mounted in 19in racks, 3U, 6U or multiples to 48U high for fitment in customers 19in cabinets. The units are based on the PM170 and PM870 series racked power supplies and utilise the ‘in-service proven’ PM series drive and control modules. The units are fitted with an appropriate motherboard at the rear of the rack so that all connections to the system are made via plug-in screw terminals suitable for direct connection to the customers wiring loom. Modular design for maximum flexibility and serviceability. The wide choice of drives and controls can be combined to provide single or multi-axis systems with each drive and control axis optimally matched to the system requirement. With drive ratings from as little as 80mA through to 8A, the PM170 based rack units offer a cost effective solution to high precision motion control for integration in customers systems

• Level C Build standard - Fully cased control systems. As an alternative packaged drive systems may be specified housed in a robust Euro-cabinet enclosure. Provided in either 4U or 7U high cabinets depending on the combination of drive and control modules required, the SM9000 series systems incorporate internal fan cooling to enable maximum module density to be achieved. SM9000 series crates are suitable for either mounting in 19 in Rack Cabinets or may be used as free standing units. Connections to the unit are via multi-pin connectors (options for connectors to customer specification), with mating leads available as an option for all motor and control signals. Giving total flexibility to meet customer needs, the modular design of the PM9000 series drive and control packaging programme enables systems to be specified to meet our customers exacting needs

The MSB series of system motherboards provide solder-free termination for the Mclennan and Alzanti range of Eurocard drives and controls. Utilising "Rising clamp" removable connectors for ease of connection and servicing they simplify the interconnection of our Eurocard based Drive and Control modules. They provide a convenient means of connecting the supplies, motors, encoders, limits and other external signals, and facilitate the interconnection of drive and control signals using solder-free screw terminals. MSB Series motherboards are fitted to the back rails of standard 19in 3U high (or multiple) Euroracks, they incorporate all the mating connectors for the appropriate drive or control module and are complete with plug-in screw terminal blocks for simple connection to the overall systems wiring loom. The use of the appropriate motherboard reduces the possibility of errors in interconnection of the drive and control modules resulting in increased system reliability and reduced commissioning time.

• Features -
• Each motherboard is custom designed
• Connectors allow easy replacement in the event of damage
• Ease of connection with clearly defined connectors reduces build time
• Motherboards may be mix and matched for a complete design solution
• Custom designed motherboards available for OEM users who require a special combination of modules

The Mclennan JB series of jog boxes provide a convenient way to manually control motors and control systems when equipped with a range of Mclennan intelligent controllers. Five models of jog box are available - JB100, JB101, JB200, JB800 and JB808, which provide the following manual control functions (varies by controller).

• Variants -
• Multi-axis control of upto 8 axes, with axis display
• Bi-directional single step (jog) function by momentary activation of a centre off switch
• Bi-directional single step (jog) function by momentary depression of  +  or  -  buttons
• Bi-directional coarse jog (10 step option) by momentary depression of a  +  or  -  button in conjunction with a fast jog button when used with a PM600 controller
• Slow speed continuous operation in the desired direction, programmable during commissioning to meet the user’s exact requirements. (Programmed in the controller using "SJ" command)
• Fast speed continuous operation in the desired direction, programmable during commissioning to meet the user’s exact requirements. (Programmed in the controller using "SF" command)