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Synth Unit - MIDI synthesiser - SAM2695 - expansion Unit for M5Stack development...

Index: MSS-24835

PPS Module 13.2 - programmable power supply module - step-down 0,5V-30V/5A - for...

Index: MSS-24829

Adapter PCB - QFP32 to DIP32

Index: AKS-25434

Set of round cup fuses 0.5A-10A - 50pcs.

Index: AKS-23073

Lark Weather Station - portable weather station with wind direction and speed...

Index: DFR-25287

Filament Spectrum Huracan PLA 1,75mm 1kg - Baby Blue

Index: SPC-24233

Set of SMD 603/805/1206 LEDs - 750pcs

Index: AKS-23084

Limit switch 50mm - Pololu 1403

Index: PLL-00017

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USB Serial Light Adapter - USB-UART converter with miniUSB connector

Index: DFR-05064

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Filament Rosa3D PLA Multicolour 1,75mm 0,8kg - Silk Pacific

Index: ROS-22263

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ACS724 current sensor carrier -10A to +10A - Pololu 4043

Index: PLL-23636

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High temperatura probe PT100 - 3x30mm

Index: SES-07475

Rotary switch 3-position 4 circuits - 60mm

Index: UCC-06152

Ohbrain - servo's and sensor's controller

Index: OHB-16742

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VL6180 - distance and light sensor with gesture recognition - I2C - SparkFun SEN-12784

Index: SPF-03319

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Set of 0.125W potentiometers with knobs - 65pcs.

Index: AKS-23089

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Laser plotter Neje DK-8-KZ - 1500mW

Index: DNG-17907

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Case for Raspberry Pi and Jetson Nano with RGB fans for cluster and NAS - 8 layers -...

Index: SEE-18308

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Soldering station ATTEN AT-937A - 65W

Index: ATT-19402

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Set of ceramic capacitors - 80pcs.

Index: AKS-23034

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Omni Wheels

Wheeled propulsion is still the most popular and simplest way to move land-based mobile platforms. In the case of robots - whether amateur or fully professional - just two independent wheels will make it possible for the vehicle to move forward and backward, turn at any radius, and also rotate in place. However, this is still not all that can be expected from a wheeled robot. Interestingly, it only needs to include three motors and special 'Omni Wheel' type 'omni-directional' wheels to give the structure unlimited movement.

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Hexagonal Wheel Adapter - 12mm/4mm - 2pcs. - Pololu 2684

Aluminum adapter converting the 12 mm, hexagonal shaft suitable for different wheels, for 3 mm motor's shaft. The length of the adapter is equal to 17 mm.

Index: PLL-06090

Index: PLL-06090

Set of Mecanum wheels - 48 mm - 4 pieces - black/yellow with rollers - DFRobot FIT0662-1

Multidirectional Mecanum wheels from DFRobot included - 4 pieces with a diameter of 48 mm . Thanks to them, vehicles can move in any direction - it is possible to drive...

5.0 (1)

Index: DFR-19386

Index: DFR-19386

Set of Mecanum wheels - 80mm - 4pieces - black/yellow with castors - DFRobot FIT0654-1

Mecanum multidirectional wheels with a diameter of 80 mm , which allow vehicles to move in any direction - straight, diagonal, horizontal, slalom on the letter S. They also...

Index: DFR-19385

Index: DFR-19385

Omni Wheel, that is... the wheel in the wheel

In essence, the Omni Wheel is nothing more than a main wheel with a series of rollers or smaller wheels around its circumference, mounted on separate axles at appropriate angles. As improbable as it sounds, it is precisely this arrangement that allows the structure to roll (and, above all, drive) in any direction. While a normal wheel (in non-slip conditions) rolls only perpendicularly to its own axis, the Omni Wheel and Mecanum wheels like it can also move, for example, sideways (parallel to its own axis) and at any other angle. These additional movements are the responsibility of the already mentioned miniature rollers, which in a way take on the "non-standard" components of the speed vector, adjusting their rotation to the current needs.

Controlling Omni Wheels

The basic assumption in the control of all robots equipped with Omni Wheels is the following: the resultant velocity vector of the robot is the result of a combination of appropriately selected velocities of all wheels. To calculate specific values it is necessary to know the geometry of the robot, i.e. the number and mutual positioning of the Omni Wheel wheels. On the Internet one can find mathematical descriptions of the control of such robots (the so-called mathematical models), whose level of complexity depends on the adopted modelling method and the complexity of the given construction. Although a full understanding of the model (which makes intensive use of trigonometry and matrix algebra) is necessary to be able to implement a control algorithm in any direction in your own program, for simple movements it is sufficient to know which drive and in which direction to turn in a given situation - which can be easily determined even by graphical methods.

Omni Wheels at Botland store

We offer a wide range of Omni Wheels, ideal for use in small mobile robots that move on a table or smooth floor. The simplest of these wheels - the OW001 and OW002 - have an outer diameter of 41 and 51 mm respectively, and a mounting hole of 14 mm (with reduction insert - 10 mm). If you want a smoother motion, choose the OW003 wheels with optimally shaped guide rollers. All other Omni Wheel multi-purpose wheels available in this category are equipped with two rows of alternating rollers. These smooth out the movement of the platform even more precisely and provide perfect support, regardless of the current rotation angle of the wheel.