Gäste Forum » Now that you are

Hexapod positioning systems (Stewart- Gough platforms) for precision micro-positioning applications became first commercially available in the 1990. Today鈥檚 electromechanical and piezoelectric hexapods are now mainstream and provide many advantages over to serial kinematics electromechanical and hydraulic parallel positioning positioning systems.


Hexapod positioners are used as surgical robots and for single mode fiber alignment applications. They are key components for all modern astronomical telescopes.


A hexapod Wholesale Joe Maddon Jersey , is mostly designed as a six-legged parallel mechanism structure with 6 actuators between two platforms. The precision actuators move in parallel (parallel kinematics). Computer controlled motion of all actuators enables motion in any degree of freedom (3 linear directions 鈥?x, y, z (lateral, longitudinal and vertical), and the three rotation directions (pitch Wholesale Anthony Rizzo Jersey , roll and yaw).


There are fixed strut length and variable strut length hexapod designs available.


Fiixed-strut-length designs can use 6 linear motors to move the basis of each joint up and down, or move in plane.


Benefits of Hexapods vs Stacked Traditional Precision Positioners


Parallel-kinematic mechanism (PKM) motion control systems have a number of advantages over standard serial kinematic (stacked) positioning systems.


Higher Stiffness


In a hexapod, all actuators act directly on the same moving platform, with the same dynamic characteristics for the six axes. Because each actuator basically only has one degree of freedom, (unlike a serial stack of stages Wholesale Addison Russell Jersey , where imperfections bearings in each axis contribute to crosstalk and runout), accumulation of off-axis errors is much less of a concern for hexapod designs. Due to the high stiffness flexing and bending errors are not an issue.


Faster


Because of the lower moving mass positioning can be performed with faster settling times than with conventional, stacked stage systems.


No Moving Cables


In such systems, runout, guiding errors Wholesale Jason Heyward Jersey , and the friction and inertia of moving cables all accumulate to limit accuracy and repeatability鈥攑roblems which do not affect parallel kinematic systems like the Hexapod.


Fixed Virtual Pivot Point


For optics and other alignment tasks, it is important to be able to define a fixed pivot point. The more sophisticated Hexapod vector controller allows choosing any point in space as the pivot point for the rotation axes by software command. The pivot point remains fixed relative to the platform.


No Cumulative Errors 鈥?In serial stacked precision positioning systems, the bottom stage supports its own moving platform plus all stages above it and wobble and guiding errors of each axis accumulate. With a hexapod all actuators work parallel and their bearings are constricted to one degree of freedom.




Piezo - About Author:
Technology has always fascinated the technician inside me. And writing about the latest in technologies and mechanisms in usage has been my forte over the last few years. Follow my write ups to know about the latest in technologies and mechanisms this season for one. This fall
Hexapod, Precision Positioning system, peizo mechanism Wholesale Ben Zobrist Jersey , piezo actuators, nanopositioning systems, linear slide, linear actuators are very much in demand among the technical and mechanical industries across the world. Keep yourself updated on these products exclusively from USA.

Smilex is one of the premier dental clinic in Pune. In terms of dental care, this is the one hospital that incorporates multiple facilities under one roof. For the patient Wholesale Kris Bryant Jersey , this means comfort, care and convenience at one place. Under the expert guidance of Dr Deshmukh, the clinic has helped thousands of patients get world class dental care. The best in class technology is perfectly complimented by the state of the art patient care facilities.


At Smilex, the primary focus is on ensuring patient care and comfort. Irrespective of the treatment, the patient is made comfortable. Utmost care is taken to guarantee that the pain and discomfort for the patient is as little as possible.
Our focus is on preventing your teeth from getting stained. Yes! The food that you eat Wholesale Kyle Schwarber Jersey , beverage that you drink and even habits like smoking are known to cause stains on the teeth. Basically, the substance coming in contact with your teeth tends to stick to the enamel and that鈥檚 what causes stain.

Coming from the experts at Smilex, here is a look at some important things that you need to know about preventing your teeth from getting stained:


Avoid drinking excessive amounts of tea and beverage as these stains are most difficult to get rid of. These beverages are high in acid content. When this acid comes in contact with the enamel of your teeth, it spells disaster.
Similarly red wine is also bad for your teeth. While the excellent beverage is a great choice for your health, it can be really bad for your teeth and the red stains can damage your precious smile. Other dangerous beverages for your teeth are colas and sodas. They are strong for the palate and for your teeth as well.


Since these drinks are strongly acidic Wholesale Yu Darvish Jersey , they cause an erosion of the enamel. Post this erosion, any food that you consume can cause stains on your teeth. In terms of food, berries, tomatoes, etc. are other highly citric options that increase the risk of your teeth being damaged.
How can you prevent it?


Now that you are aware of what causes the stains on your teeth Wholesale Javier Baez Jersey , here is a look at the steps that you can take to prevent this stain formation. First things first, remember to brush your teeth as often as possible. This maintains hygiene and ensures that the
ormax 2018[/url] Wholesale Nike TN Shoes