The TMC2041 – Trinamic’s new dual-axis stepper motor driver

Dual-Axis Monolithic IC Stepper Motor Driver for Exceptionally Quiet Operation.
Trinamic - TMC2041 LATRINAMIC Motion Control announces a new dual-axis stepper motor driver IC with integrated MOSFET power switches. The new TMC2041 delivers 1.5A (peak) at 26V supply voltage per motor, meaning it’s suitable for driving motors from NEMA 8 to NEMA 17. Based on Trinamic’s high-performance spreadCycle™ chopper, it allows for precise and smooth motor operation and up to 75% energy savings using coolStep™.
“The TMC2041 successfully combines several of Trinamic’s technological innovations into a single device. It achieves a new maximum for motor voltage and current specs in a monolithic easy to use motor driver for 2 stepper motors,” explains Michael Randt, Founder and CEO of Trinamic. “Ease-of-use was the guideline for our designers, as well as cost efficiency. The result is an integrated circuit that enables superior control of stepper motors for any application, relieving designers of the need for specific motor control know-how.”
With an easy to use step and direction interface and the option to read back a variety of diagnostics values via SPI, the TMC2041 is designed to work with common motion control algorithms. The integrated step pulse interpolation engine microPlyer™ accepts a step pulse resolution of 16 pulses per full step while interpolating the current control to 256 microsteps, resulting in superior smoothness of the motion.
The compact TMC2041 is ideally suited for office automation, 3D printers, medical applications, and other applications where machinery works in close proximity to human operators, as these environments often have strict noise limitations. Available from September 2017 in a QFN48 (7×7) package.  An evaluation kit, proven and tested reference designs and a package of libraries allow for fast design in.


Features and benefits
  • Two 2-phase stepper motors
  • Drive Capability up to 2x 1.1A coil current (2x 1.5A peak)
  • Parallel Option for one motor at 2.2A (3A peak)
  • Voltage Range 4.75 … 26V DC
  • SPI & Single Wire UART for configuration and diagnostics
  • Highest Resolution up to 256 microsteps per full step
  • microPlyer™ microstep interpolation
  • spreadCycle™ highly dynamic motor control chopper
  • stallGuard2™ high precision sensorless motor load detection
  • coolStep™ current control for energy savings up to 75%
  • Full Protection & Diagnostics
  • Compact Size 7x7mm2 QFN48 package
For details of the TMC2041 and other products from Trinamic contact Sales on 01376 333333 or at

All your motion control requirements from one supplier ‘MICROMECH’ the UK’s premier mechatronic specialist.

In addition to supplying and supporting cutting edge electro mechanical products from some of the biggest names in motion control, Micromech provides a complete service to OEMs machine builders and end users.

Application engineering and product specification:
Send us details of your application and our engineers will specify the optimum cost-effective solution at the best possible price. From simple components to complete bespoke motion control systems we can help. In many cases products can be modified or adapted to create an exact fit for your machine.

System engineering:
Our systems division engineers are experts in bespoke motion control systems. From standard single axis stepper and servo systems to multi axis systems with HMI or PC front ends, we can provide a comprehensive service for end users upgrading a machine, special purpose machine builders or OEM’s. We can also provide a mechanical design and manufacture service and have experience with mechanical sub assemblies and small special purpose machines.

Our capabilities include:
Electrical design (AutoCad).
Mechanical design (Solidworks 3D).
Software design including Labview, Visual basic, Trio Motion Perfect, Parker motion software, Kollmorgen motion software IEC61131 languages.
Control panel wire and assembly.
Mechanical manufacture and assembly.
Installation and commissioning.


“I have had a long relationship with Micromech and always found them friendly, helpful and ready to turn an idea into a reality by listening to what is required, then by us working together bringing that idea to fruition. Special thanks go to Mick Stone and Mark Hall together with Dave Whitmell and Phil Farnworth who not only create fine workmanship but also brilliant entertainment.”

“Micromech is a company in which you can trust. Since 2005 Micromech is a good supplier of Nortemecánica.”

“It was a pleasure working with Micromech throughout our project. Stirling, Mick and everyone else we dealt with were very professional, but also very flexible and friendly. We always felt we were getting good advice and good service.”

Suppliers include:

For all motion control and automation requirements:
Call our sales team on 01376 333333 or Email

KSM Safety Solutions Significantly Improve Productivity

With KSM Kollmorgen completes the motion safety chain from sensor-to-drive

  • Significantly higher productivity using the Motion Safety Concept
  • Low system costs using standard commercial of-the-shelf (COTS) components
  • Flexible and expandable safety solutions utilizing modular design
  • Tested and certified by TUV achieving PLe (ISO 13849) and SIL3 (IEC 61508)
  • Interfaces seamlessly to Kollmorgens´s AKD, ServoStar, and Kollmorgen motion systems
  • All important safety functions are available with the modules
Kollmorgen KSM Safety Solutions


Safety Functions for PL e and SIL 3
• Safe Stop Function: STO, SS1, SS2, SOS
• Safe Velocity Function: SLS, SSM, SSR, SMS
• Safe Position Function: SLP, SCA, SLI
• Safe Direction Function: SDI

• Safe Brake Function: SBC
• EtherCAT
• CANopen
• Profinet
• PROFIsafe and EtherCAT FSOE slave
In combination with AKD servo drives and other Kollmorgen solutions you can develop expandable motion systems to increase performance and productivity at lower costs.
KSM-compact Safety Module
• For 1 or 2 safe axes
• Up to 2 expansion modules
• Base unit with 16 safe I/O
• Expandable up to 60 safe I/O
• 1 safe relay output, expandable
• 2 pulse outputs, 2 standard outputs
• Expandable up to 6 pulse and 6 standard ouputs
• Up to 800 function blocks
• Space-saving, compact design
KSM-modular Safety PLC
• Up to 12 safe axes
• Up to 8 expansion modules
• Base unit with 56 safe I/O
• Expandable up to 200 safe I/O
• 1 safe relay output, expandable
• 2 pulse outputs, up to 10 standard outputs
• Expandable up to 14 pulse and 22 standard outputs
• Up to 3000 function blocks
• For applications with large number of interfaces


Motion Safety – The Concept for Safe Motion

Motion Safety – this is innovative safety technology from Kollmorgen combining safety logic and drive monitoring in the drive. Conventional safety technology keeps the operator away from areas with hazardous motion. Drives with Motion Safety, however, allow operator intervention without process interruption.

Productivity Gains with Motion Safety
Intelligent Safety functions monitor areas with hazardous motion allowing the machine to effectively intervene with minimal process interruption. Functions such as safe position (SLP) limit the range of machine motion to ensure that personnel remains safe. Machine zones that pose no risk to the operator remain running. The diagram shows the gain in productivity. You can see from the yellow line that production continues during user intervention with Kollmorgen Motion Safety technology.

Kollmorgen – Your Skilled Partner for Safe Motion Control Solutions Safe Motion from a Motion Expert

Safety logic, servo drives and motors and even complete safe automation solutions – Kollmorgen delivers matched components from one source. Additionally, we offer efficient development tools and engineering support for existing machine designs or innovative new developments. Take advantage of Kollmorgen’s innovative capacity and experience for the development of your safe motion control solution.

For details of the KSM range and other products from Kollmorgen contact Sales on 01376 333333 or at

A Quick Guide: How Servo Motors Work

Article Posted by Electromechanical Team on Thursday, October 5, 2017, on the Parker Motion & Control Technology Blog
Parker - How Servo Motors Work

The basic theory of operation for brushless servo motors revolves around the principles of magnetism where like poles repel and opposite poles attract. There are two magnetic sources found within a servo motor: Permanent magnets that are typically located on the rotor of the motor, and the stationary electromagnet that surrounds the rotor. The electromagnet is called either the stator or motor winding and is made up of steel plates called laminations, that are bonded together. The steel plates typically have “teeth” that allow copper wire to be wound around them.

Going back to the principles of magnetism, when a conductor like copper wire is formed into a coil, and the conductor is energized so that current flows through it, a magnetic field is created.

Parker - How Servo Motors WorkThis magnetic field created by current passing through the conductor will have a north pole and a south pole. With magnetic poles located on the stator (when energized) and on the permanent magnets of the rotor, how do you create a state of opposite poles attracting and like poles repelling?

The key is to reverse the current going through the electromagnet. When current flows through a conducting coil in one direction, north and south poles are created.

When the direction of the current is changed. the poles are flipped so what was a north pole is now a south pole and vice versa. Figure 1 provides a basic illustration of how this works. In figure 2, the image on the left shows a condition where the poles of the rotor magnets are being attracted to the opposite poles of the stator. The rotor poles, which are attached to the motor shaft, will rotate until they are aligned with the opposite poles of the stator. If all stayed the same the rotor would then remain stationary.

The image on the right in figure 2 shows how the stator poles have flipped. This would happen every time the rotor pole caught up with the opposite stator pole by reversing the current flow through that particular stator location. The continual flipping of stator poles creates a condition where the permanent magnet poles of the rotor are always “chasing” their stator opposites which results in the continuous rotation of the rotor/motor shaft.

Parker - How Servo Motors WorkThe flipping of the stator poles is known as commutation. The formal definition of commutation is “The action of steering currents to the proper motor phases so as to produce optimum motor torque and motor shaft rotation”. How are the currents steered at the correct time to maintain shaft rotation?

The steering is done by the inverter or drive that is powering the motor. When a drive is being used with a particular motor an offset angle is identified in the drive software along with other things like motor inductance, resistance, and other parameters. The feedback device that is used on the motor (encoder, resolver, etc..) provides the position of the rotor shaft/magnetic pole to the drive.

When the magnetic pole position of the rotor matches the offset angle, the drive will reverse the current going through the stator coil thereby changing the stator pole from north to south and from south to north as shown in Figure 2. From this you can see that letting the poles align will stop the motor shaft rotation, or changing the sequence will get the shaft spinning in one direction vs. the other, and changing them quickly allows for high speed rotation, or just the opposite for slow shaft rotation.

Article contributed by Jeff Nazzaro, gearhead and motor product manager, Electromechanical and Drives Division, Parker Hannifin Corporation.

Licensing for these images came with permission from the Parker Hannifin Media Manager collection.
Article reposted with Parker Hannifin’s permission.

Miniaturised stepper driver module

TRINAMIC Motion Control announces the TMCM-1210, a highly miniaturised yet technologically leading-edge stepper driver unit. The evolution of technology is transforming all industries, including motion control. Components are becoming faster, cheaper, more powerful… and much smaller.

Trinamic TMCM 1210“For many manufacturers, miniaturisation is transforming their organization by allowing smaller and decentralised devices, resulting in leaner processes and reduced storage and logistics cost,” explains Trinamic’s CEO Michael Randt. “With the NEMA 8 motor mountable TMCM-1210, Trinamic once more demonstrates its ambition to be at the forefront of technology”

The general trend towards miniaturisation is driven by a demand for compact, decentralised devices instead of huge machines. This trend is visible in all kinds of applications such as microbiology instrumentation, lab automation, scientific test equipment and micro precision systems.

Like all other TMCM modules, the TMCM-1210 embeds advanced motor control functions, as well as motion control and PLC features, into a tiny and cost-efficient module. The new driver module (20mm x 20mm) is equipped with an RS485 interface and Trinamic’s proprietary TMCL™ protocol. Together with the free TMCL-IDE, this allows for easy implementation of a standalone program flow. Graphical tools and wizards guide through the parameterisation.

Being based on Trinamic’s latest stepper motor driver generation, the TMCM-1210 offers leading edge current control technologies. A high-resolution microstepping with up to 256 equidistant microsteps per full-step generates a total resolution of 51.200 steps per rotation, resulting in vibration free positioning. With Trinamic’s patented stealthChop™ current control for silent positioning at low speed and spreadCycle™ for highest performance at high speed, the module provides superior performance wherever small stepper motors are used.

The integrated sixPoint™ ramp generator allows for precise and rapid positioning. Even in environments where parameters and target positions must be changed during motion. The module has a reference switch input that can be programmed as left or right limit switch. In addition, it comes with stallGuard2™ for sensorless homing and an integrated rotary hall encoder.

For details of the full TMCM module range and other exciting products from Trinamic contact Sales on 01376 333333 or at