Showing posts with label Gearing. Show all posts
Showing posts with label Gearing. Show all posts

Friday, February 1, 2013

GstarCAD2012EX

Integrates several bugs fixed and enhancements that exist before middle November 2012, such as: crash files, secondary development, functions error,


etc. Improved the function of hatch edit, added the boundary options such as: Recreate boundary associated/no associated and delete boundary are available

and enhanced. Improved the Mtext Editor, better text input/edit visibility. The Mtext editor box will pop up at top of the Mtext frame which makes easy input text.

Also the Mtextfixed values have been enhanced on displaying and editing Mtext at any position (angular, horizontal, vertical). The enhancement for publish is

the addition of <3d dwf=""> option for Page Setup. You can create and publish DWF file of your 3D model with nearly the same visual fidelity as your DWG file.

This version not only integrates bug fixes and enhancements but also is packed with innovative tools that you can easily find out in the express tools such as: Areasum, Layout by path, Align Tool, Arrange Tool, Text Match, Change Text, Text Align, Line2PL, SPTPL and Batpurge. These tools will help you in the
process of automating tedious tasks such as moving, editing and copy objects in a short time and easily way.

Sunday, February 6, 2011

Gearing

In a closed-loop system, gearing may be used to couple a high-speed, lowtorque
motor to a lower-speed, higher-torque load. The gearing must meet requirements
for accuracy, strength, and reliability to suit the application. In addition, the closed loop requires minimum backlash at the point where the feedback sensor is coupled. In a velocity- controlled system, the feedback sensor is a tachometer that is usually coupled directly to the rotor shaft. Backlash between motor and tachometer, as well as torsional compliance, must be minimized for stable operation of a high-performance system. Units combining motor and tachometer on a single shaft can usually be purchased as an assembly. By contrast, a positioning system may use a position feedback sensor that is closely coupled to the shaft being positioned. As with the velocity system, backlash between the motor and feedback sensor must be minimized for closed-loop stability. Antibacklash gearing is
frequently used between the gearing and the position feedback sensor. When the position feedback sensor is a limited rotation device, it may be coupled to a gear that turns faster than the output gear to allow use of its full range. Although this step-up gearing enhances it, accuracy is ultimately limited by the errors in the intermediate gearing between the position sensor and the output. When an appreciable load inertia is being driven, it is important that the mechanical stiffness between the position sensor coupling point and the load be high enough to avoid natural torsional resonances in the passband.