Hexapod robots, also referred to as simply “hexapods” or “Stewart platforms,” are a type of parallel kinematic device with six degrees of freedom. You might recognize hexapod robots as the technology behind motion simulators and vibration isolation mechanisms, where their six degrees of freedom (X, Y, Z, roll, pitch, and yaw) allow them to accurately […]
Motion Trends: Linear bearings help some CNC machine builders trim cost
Axes on CNC machines to allow spindle movements are mission critical — requiring high accuracy. But doors and other linear axes have different design requirements — with forgiveness and ruggedness being priority instead. Now, linear bearings from Rollon Corp. help some CNC machine builders trim cost and improve reliability by satisfying these unique design requirements. […]
Linear motion trends in slides: Robotics and mobile designs lead the charge
Demand for simple-to-install and pre-integrated linear-slide systems continues unabated … especially in applications only recently automated. Here’s the perspective of Matt Mowry, North American market manager for drylin products at igus: “We’ve supplied fully assembled and customized linear-slide tables … complete with motors and accessories. We’ve also supplied custom-extruded linear profiles and bearing liners to […]
How to measure synchronous (toothed) belt tension
One of the benefits of synchronous belts is their ability to operate with lower tension than their V-belt counterparts. And once the proper tension is determined and applied, synchronous belts rarely need re-tensioning. But improper tension in a synchronous belt drive system — either too low or too high — can lead to poor meshing […]
Festo at Automate 2019: OEM productivity-boosting solutions
Festo is showing electric and pneumatic motion-automation solutions at Automate 2019 April 8 to 11 at McCormick Place in Chicago — Booth 8151. Productivity-enhancing solutions include company-wide component interoperability and online tools for designing subassemblies that slash OEM engineering overhead and reduce delivery time. With the Festo Handling Guide Online, engineers can design single-axis or […]
Update on roller-screw actuator design and applications (with video and image galleries)
Roller screws are also called planetary roller screws or sometimes satellite roller screws for how their nut-encased rollers orbit the drive-shaft axis during operation. These mechanical rotary-to-linear devices work in an increasing number of electromechanical actuators. Satellite roller-screw geometry includes far more internal contact between load-bearing subcomponents than their ballscrew cousins, and that boosts rigidity […]
Cannabis cultivation leverages modular automation stations
By Michael G. Giunta • National sales manager | Macron Dynamics Uninitiated laymen might assume today’s cannabis is grown through traditional farming — over horizontal outdoor spaces in natural environments managed by Mother Nature. But large-scale cannabis farming is typically indoors and highly automated. That’s for a couple reasons: • Security is a major concern […]
New 20-mm linear stepper motor now available from Nippon Pulse
Nippon Pulse now sells the the PFL20 Linearstep — its smallest linear stepper motor yet. The PFL20 is a highly efficient, high thrust tin-can linear actuator with a 20-mm diameter and a bipolar winding. PFL20 is RoHS-compliant, has a 30/60-mm effective stroke, and can reach 6 N of force at 200 pps. With 24 steps […]
Are brushed motors suitable for industrial applications?
Brushless motors dominate the industrial motion control market, but brushed motors still make sense for some applications, thanks to their linear performance and ease of use. DC motors can use either mechanical or electronic commutation. Brushed DC motors rely on the mechanical method, with brushes and a commutator, while brushless DC motors use electronic methods […]
Mechanical properties of materials: Shafts in torsion
Power transmission shafts — on motors and gearboxes, for example — are subjected to torque loads that result in torsion, or twisting of the shaft about its axis. Similar to structures under tension or compression, two important mechanical properties of shafts under torque loads are shear stress and shear strain. Stress is a material’s resistance […]
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