New High-Performance Servo Motors with NEMA 17 Mounting From IQ Motion Control Use Magnetic Encoding

Compact, high-torque motors with integrated sensing and control.

James Lewis
3 years agoRobotics

Not all stepper motors are created equal. For example, IQ Motion Control's latest Fortiq BLS42 modules use magnetic encoders, PID, and anticogging algorithms to achieve high torque in a compact package with a NEMA-17 compatible mounting. As a result, applications like 3D printing, CNC machines, and Robotics benefit from Fortiq's advantages.

"Fortiq BLS42 modules are around 55% more compact and 65% less expensive than traditional servos with similar torque and speed ratings." — IQ Motion Control

Fortiq BLS42 are integrated motors, sensors, and controller modules. Sensing is the highlight feature. It uses magnetic encoding instead of optical encoding, like what you might find in other integrated motors. The result is a more compact package compared to other motor modules with similar torque.

Several algorithms result in smooth, precise, and nearly silent operation. Fortiq calls out encoder linearization, Anticogging, and a tunable PID but does not offer many details about how those work. (At least, not at this time.) The BLS42 experiences 90% less cogging than other designs, and the encoder's accuracy is +/- 2 ticks.

Initially, when the product launched, it featured a less known mounting pattern. However, IQ Motion Control recently announced a change to its modules to support NEMA-17 compatible mounting.

APIs for popular programming environments, such as Python, Mathlab, and the Arduino IDE, make writing software to use the motors very simple. With built-in GPIO pins and an analog input, it may also be possible to incorporate some control into the BLS42 module itself. Communication with Fortiq occurs over CAN, Serial/UART, PWM, or GPIO pins. There is also an open-drain output that allows for driving high current devices like LEDs or heater elements.

Currently, there are four 42 x 42 mm modules available. Their torque ranges from 0.063 Nm to 0.25 Nm, depending on the module. Modules start at 125 USD (plus shipping.)

IQ Fortique BLS42's Crowd Supply campaign ends on July 6th, 2021, with shipments planned for November 30th, 2021.

James Lewis
Fan of making things that blink, fly, or beep. Host on element14 Presents, baldengineer.com, AddOhms, and KN6FGY.
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