In many devices lead screw assemblies are used to convert motion from rotary to linear and vice versa. Historically these assemblies have had poor efficiencies and relied on grease for improved performance. Over the past few decades the advent of engineered polymers and new manufacturing … [Read more...]
Pressure Velocity and Leadscrew Assemblies
Pressure velocity (PV) is a fundamental property of all plastics, and is specific to the composition of the plastic. PV for a lead screw application is a calculated value based on load and surface speed of the interface between the leadscrew and nut. Manufacturers now have the ability to mold in … [Read more...]
Stepper Motor Linear Actuators 101
With trends towards miniaturization, precision, computer control and cost reduction, hybrid and can-stack style integrated stepper motor actuators are being used in an ever increasing range of applications. These precise, reliable actuators can be found in many applications including blood … [Read more...]
Understanding How Feedback Encoder Devices Operate
Feedback is used in closed loop systems in applications across all markets to control speed and/or position, and it has an important role in keeping equipment operating smoothly and accurately. This guide provides an overview on open and closed loop systems, hall sensors, and also covers encoder … [Read more...]
4-point bearings do triple duty while saving space
A four-point contact ball bearing makes it easy to simplify machine designs that have a combination of radial, thrust and moment loads because it can handle all three simultaneously. They are primarily used for slow to moderate-speed applications, or where oscillatory movement is predominant. … [Read more...]
How to Prevent Step Losses with Stepper Motors
While stepper motors are an excellent solution for many applications, a key concern is step losses. However, in most instances step losses can be prevented or corrected. It is important to remember that a stepper motor does not operate like a DC motor. There is no working point parameterization, … [Read more...]
Introducing Galil’s New H-Bot Firmware
This article will discuss the advantages and disadvantages of using an H-Bot for systems that use planar movement as well as Galil's H-Bot firmware solution for the DMC-40x0. … [Read more...]
Why bigger isn’t always better: the case for thin section bearings
Kaydon's new capacity calculations for thin-section bearings For applications that demand maximum performance despite space and/or weight restrictions, designers should give serious consideration to thin section bearings. While conventional bearings often have more load capacity, thin section … [Read more...]
Stepper Motor Drives Some Factors That Will Help Determine Proper Selection
This white paper will discuss methods of selecting the best Stepper Drive for motion control applications requiring a Stepper Motor or a Stepper-Based Linear Actuator; information about the typical types of Drives; effects of different applied voltage levels; and of various Drive settings / options … [Read more...]
Incremental Encoder Signals
Incremental encoders are used on motors and equipment as feedback devices to determine position and direction of machinery. Motor controllers can also use position information from the encoder to commutate the motor and calculate velocity for speed control. The incremental encoder is a critical … [Read more...]
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