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![[Post New]](/templates/default/images/icon_minipost_new.gif) 4 Apr 2008 04:13:13 IST
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What is backlash error?
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5 Apr 2008 23:45:35 IST
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Backlash is an unavoidable property of all reversing mechanical couplings (although its effects can be negated), and may or may not be desirable, depending on the application. Some backlash is required to allow for lubrication, manufacturing errors, deflection under load and differential expansion between the gears and the housing.
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<TABLE CELLSPACING="1" CELLPADDING="1" BORDER="0">
<TR><TD>
<DIV ALIGN="right">Glitter Graphics</DIV></TD></TR></TABLE>
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5 Apr 2008 23:47:28 IST
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It is a source of error in Searle's experiment for determining the Young's modulus of a wire.
Plz rate if its useful.
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<TABLE CELLSPACING="1" CELLPADDING="1" BORDER="0">
<TR><TD>
<DIV ALIGN="right">Glitter Graphics</DIV></TD></TR></TABLE>
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An error in positioning caused by the reversal of travel direction. Backlash is the portion of commanded motion that produces no change in position upon reversal of travel direction. Backlash is caused by clearance between elements in the drive train. As the clearance increases, the amount of input required to produce motion is greater. This increase in clearance results in increased backlash error. Backlash also affects repeatability. Unidirectional repeatability refers to the repeatability when approached from the same direction. It does not take into account the effects of backlash. Bidirectional repeatability specifies the repeatability when approached from any direction and includes the effects of backlash. Aerotech controllers have the capability to correct for backlash, if required. All of Aerotech?s direct-drive tables exhibit zero backlash error.
here what i found on google
rate me please as i had to do all search for that
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