ClearPath all-in-one servo: brushless servo motor, high resolution encoder, digital servo drive, and motion controller

See the first servo system affordable for
all your motor needs.

Fully Integrated System Supremely Easy to Use
Integrating the electronics with the motor gives you a perfectly matched motor and drive, a more compact solution, requires no cable between motor and drive, is faster to install, and a lower overall system cost. ClearPath’s auto-tuner optimizes performance for any mechanics. Its opto-isolated electrical interface simplifies wiring. And free Windows® setup/diagnostic software makes servo control easy even for new users.
State-of-the-Art No Worries
You don’t need to know what vector torque control or 3rd-derivative feedforward means to enjoy smooth motion, exceptional accuracy, and high bandwidth disturbance rejection. ClearPath’s adaptive servo algorithms ensure high performance even with non-linear or high-inertia loads. Try ClearPath today. Take up to three months to fully exercise it. If you’re not thoroughly impressed, just send it back. Even if you’ve beat up the motor and thrown away the packaging, you’ll still get a full refund.
Full Return Policy

Basic Specifications and Pricing

  ClearPath NEMA 23-34 models
Fractional hp
ClearPath AC Power
Integral hp
Power Range
Peak
RMS
 
100W - 900W
100W - 400W
 
900W - 6400W (1.2 - 8.6 hp)
900W - 3100W (1.2 - 4.1 hp)
Input Power 24 - 75
DC Volts
100 - 240
AC Volts
Dimensions
NEMA Size
Length Range
 
23, 34
3 - 6 inches
 
56, 143, D100 (IEC)
12 - 14 inches
Price (qty. 1 - 9) $254 & up $698 & up

* Try ClearPath risk-free for 3 months. Full refund if you're not 100% impressed! *

How Does ClearPath Compare?

See how ClearPath stacks up against competing motor technologies...


vs.
STEPPER MOTORS


vs.
OTHER SERVOS


vs.
AC INDUCTION MOTORS

ClearPath-SD Step and Direction ClearPath vs. Other Servos ClearPath vs AC Induction Motors
ClearPath-SD series servo systems are a perfect drop-in replacement for your stepper system. No more lost steps, whisper quiet motion, and increased machine throughput with 8-13x more power than similar size steppers. Upgrade your current servo system with any of Teknic's ClearPath servo systems and get state-of-the-art performance in a compact and integrated package at an unbeatable price. Being able to smoothly start and stop with 0.001% velocity accuracy, hold position without expensive mechanics, and the ability to access full torque at low RPM make ClearPath motors a must-have replacement for AC Induction motors.
ClearPath
vs
Stepper Motors
ClearPath
vs
Servo Motors
ClearPath
vs
AC Induction Motors
Learn  More

More Benefits

More User Benefits

Set Up Via USB
With a standard USB port and cable you can configure ClearPath and use its diagnostic tools. There are no switches or potentiometers to manually set. You can also quickly save and recall set-ups for simple and reliable installations.

User-definable Global Torque Limiting
You can adjust each ClearPath motor to limit its maximum torque to protect your mechanics.

Automatic Torque Foldback
In some cases, you want to use full torque except at certain times, for example, to clamp or insert something, or when you encounter an obstacle or hard stop. ClearPath can be set up to automatically limit the torque (to a value different from the global torque limit) in these situations and more. You can also use this feature to gently move into a hard stop to set a home position without using a home sensor.

Hold Position with No Drift
Even in vertical applications, when subjected to external forces, ClearPath will accurately hold its commanded position.

Runs Smoothly at Low (or Zero) Speed
Unlike AC induction motors and stepper motors, ClearPath's vector servo control allows it to run smoothly at all speeds. ClearPath will also servo lock to any desired position unlike AC induction motors.

Power Density
Compared to AC induction motors and non-integrated servo motors, ClearPath has 3 to 5 times the shaft power per cubic inch of space. Its rare earth, Neodymium-Iron-Boron permanent magnets and 200ºC-rated winding insulation means that ClearPath can be pushed hard without worry.

Dynamic Braking
ClearPath can be configured to use its regenerated enegy as a source to stop its own motion in cases where the motor is disabled by the user or if it shuts down due to an error condition.

Brush Motor Replacement Mode
You can connect ClearPath MC models directly to the H-bridge outputs of a brush motor amplifier to use it as a drop-in replacement for brush motors. ClearPath SD models are powerful replacements for brush motors used with digital input servos.

Regulatory Certifications: UL, CE, RoHS

Regulatory Certifications

No Maintenance Ever
The only components in ClearPath that are subject to wear are the shaft bearings. That's why we only use sealed, permanently lubricated bearings, and over-size them for extra design margin. In most applications, the average lifetime for the front bearing is expected to be more than 25 billion revolutions. At 1,000 RPM, running 24 hours a day, that's almost 50 years!

ClearPath Return Policy

We want you to be able to thoroughly evaluate ClearPath in your application so you can be confident that it meets all your needs. So we’ve extended our return period and made the return condition very liberal.

For up to 9 units returned on any order:

Teknic will give you a full refund (excluding shipping) on up to nine ClearPath motor units on any order as long as they are returned within 90 days of the invoice date. It is okay for the units to have reasonable wear and tear from using them, but they must be returned in their original packaging (or comparably protective packaging) and still be fully functional (i.e., they must still meet their specifications). Up to nine each of any accessory part number may also be returned under the same conditions.

For the 10th or more motors returned on a given order:

The same return policy as above applies except that we will charge a 15% restocking/refurbish fee on these excess returns.

Miscellaneous:

All ClearPath motors, regardless of part number, are summed together to determine the quantity being returned. Accessories are summed together on the basis of unique part numbers (so, for example, you could return nine power cables and nine USB cables without a restocking charge on these eighteen accessory parts).

Once your return is received and inspected (usually within 72 hours of receipt), your refund will be processed and a credit will be automatically applied to your credit card or original method of payment within seven days. Please note that depending on your credit card company, it may take an additional 2-10 business days after your credit is applied for it to post to your account.

Quality/Reliability

Quality, Ruggedness and Reliability

It's probably obvious that the fully integrated design of ClearPath, by its very nature, will increase the ruggedness and reliability of your system. The most failure-prone element in all motion systems—the cabling—has been greatly reduced. In fact, the motor-drive cable, the most complex and troublesome cable, is altogether eliminated. But ClearPath has numerous design features, beyond the integration of the motor, encoder, drive and controller, that further enhance reliability. Read on to see how quality and reliability has been designed into every aspect of ClearPath, and you'll see why we're able to provide the longest warranty in the industry.

Motor Design and Construction Features
Every component in the construction of ClearPath motors has been carefully engineered using the highest quality materials, design, and manufacturing processes.

The rare-earth magnets are fully sintered, not bonded together with plastic; the wire insulation exceeds Class H temperature specs; the finish is anodized or electrophoretically-coated (not painted or raw); the extra-large bearings are permanently sealed; and more. Browse through the photos below which show the internal construction, and see for yourself.

Pressed and laced end turns are quiet and reliable

Winding end-turns are pressed tightly together and laced to form a nearly solid mass of copper for better thermal performance. Tightly packed wires vibrate less as current flow changes, so they are audibly quieter and their insulation doesn't abrade and fail over time.

Winding end-turns are pressed tightly together for better thermal performance, are quiet, and reliable.

Powerful rare-earth permanent magnets generate maximum power

"Bonded" neodymium ring magnets (right) are made by mixing NdFeB powder with a plastic resin. ClearPath uses magnets made of virtually pure NdFeB that has been "sintered" into solid bricks (left). These sintered magnets are extremely powerful compared to the plastic bonded magnets. AC induction motors, which use electromagnets rather than permanent magnets, only have about 25% as much power as ClearPath for the same size motor.

ClearPath uses rare-earth permanent NdFeB magnets; provides ~4 times the power of same sized AC induction motors

Precision machined shaft allows higher side loading

The shaft diameter transition in all ClearPath motors is smoothly radiused. Motor shafts with abrupt diameter transitions (right) have severe internal stress concentrations that can cause their shafts to break when side-loaded.

ClearPath motor’s shaft diameter smooth transition (left) minimizes stress concentrations and increase side-load strength

Overlapping coils further enhance motor smoothness and power

Compared to the common and simple one-coil-per-tooth stators (right), ClearPath stators (left) use an overlapping, alternate-slot fill pattern with two coil sections per slot. This reduces torque ripple, cogging, and detent torque, improves electrical responsiveness, and increases power output.

ClearPath motor’s overlapping coils (left) enhance motor smoothness and power; reduces torque ripple, cogging, and detent

Compression-fit housing helps cool the motor

ClearPath has a compression fit, aluminum housing surrounding the stator that provides a low-resistance path to conduct heat out of the motor and into the mounting suface (which typically acts as a big heat sink). This increases continuous power output and improves reliability. Many motors have no housing (exposed laminations) and so have a poor heat path to the mounting surface.

ClearPath motor’s compression-fit, aluminum housing provides low-resistance path to cool the motor

Individually custom-balanced rotors reduce vibration and fatigue

ClearPath's custom-made, brass balancing weights (left) are more precise and secure than common balancing putty (right). The weight is held captive by the shaft (under the bearing) so that it can not come loose like balancing putty often does.

ClearPath motor's custom, brass balancing weights (left) are more precise and secure than balancing putty (right)

Precision fit components means no worries about dust and water splashes

For extra protection beyond ClearPath's close-tolerance, closed mechanical design, an optional dynamic shaft seal is available. ClearPath's high quality shaft seal is spring tensioned, has a Viton® lip for minimal compression set and excellent high temperature properties, and a PTFE coating for low friction and wear. It also has a metal outer case for greater structural rigidity, and a Viton® outer coating for a better OD seal and more tolerance to thermal expansion differentials.

ClearPath motor’s spring-tensioned, PTFE coated, Vitron shaft seal option improves dust and water protection

Drive and Motor Protection Features: Rugged design and construction is great for long life under tough conditions, but ClearPath also has many features that protect it from mishaps that might cause immediate death for other motors—reversed wiring, shorted inputs or outputs, voltage overloads, mechanical jams, etc. Here are some of the protection features built into every ClearPath motor:

In all these shutdown situations, ClearPath will dynamically brake the moving load. Other motors just freewheel when they shut down, allowing your mechanics to crash.

Production Quality and Warranty
Every single ClearPath motor receives a full suite of in-line and post-production tests to assure you of the highest incoming quality. This includes testing for:

Three Year Warranty

Unsurpassed Warranty
ClearPath is warranted to be free from defects in material and workmanship for a full three years. These systems are built to last.

So, What's the Catch?

You may be wondering...

...how we're able to offer an industrial-quality, state-of-the-art, complete servo system at prices that compete with DC brush and AC induction motor systems. Well, frankly, one of the ways we achieved ClearPath’s low price was by simply leaving out certain features. To help us decide what to leave out, we consulted a large number of our most experienced users, and asked them which features they'd miss the least. If the features were costly, we just left them out. Doing this, we may have made ClearPath a little less attractive for some applications, but it means now you can use a servo system where you could never afford to before.
Read what we left out.

General purpose I/O. ClearPath’s I/O is dedicated to control its own functions. If you need I/O for other machine functions, you’ll need to use the I/O from another source (e.g., your PLC or a GPIO card).

Encoder output connector. Being a servo, ClearPath uses an integrated 12,800 count per revolution encoder (64,000 count/rev for AC-input models) to maintain accurate position and velocity, but we reduced cost and space (and got rid of potential noise problems) by not running the encoder signals to the outside world. ClearPath does have a digital status output, however, to tell you when moves are done or target speeds are reached. And you can query ClearPath-SC’s encoder position via software or capture position (with the advanced firmware option) on the fly.

Memory for downloaded programs To use ClearPath, you configure it to your desired mode of operation and then control it with: (1) digital I/O or switches and buttons (ClearPath-MC), (2) step & direction signals (ClearPath-SD), or (3) software commands from an external Windows or Linux CPU (ClearPath-SC). There’s enough built-in control capability to do some pretty sophisticated tasks (see the overview video), and with ClearPath-SC and C++, you can get virtually unlimited flexibility, but there’s no built-in memory to run stand-alone programs. But, at least you won’t have to learn a new programming language.

Of course, we did a lot more to reduce cost than just leave out a few features.
Here are the biggest reasons that ClearPath can offer high quality and high performance at such a low price:

  • Innovative firmware takes the place of expensive hardware. We use advanced firmware algorithms—some newly developed, and many borrowed from our other high-performance products—to greatly reduce hardware cost (and provide better servo performance at the same time).
  • Economies of scale reduce cost and improve lead time. ClearPath benefits from economies of scale because it uses many of the same components and production systems as Teknic’s popular Hudson motor line.
  • Integration eliminates even more hardware. Integrating everything into one package was a tough design challenge, but it got rid of connectors, cables, circuit boards, and cases…and a whole lot of cost.
  • You buy directly from Teknic. With ClearPath, there are no middlemen. You save the 30-40% markup that typically goes to distributors. You won’t have a local sales guy, but on the other hand, you’ll get your technical support directly from the experts on the product (that’s us).