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The idler database contains information on conveyor idlers; it can either be generalized data on generic idlers, or specific manufacturer data. Some of this data can be selected and modified for the specific conveyor case being evaluated in the Idler Tab on the Main Screen.

The Edit Idler Database screen is accessed from the Edit > Idler Data menu item.

The database that is opened is the specification selected in the idler tab (i.e., CEMA5, etc.). The name of this database is displayed in the first row and column of the table. In the case where more than one idler database is being used, the selection of which database to edit is made with a pull down list in the first row and column of the table.

Some of the supplied idler databases, such as the default database "CEMA5", may be designated as read only. The read only databases can be viewed, but a "Read Only" label will appear and the data can not be modified.

Otherwise, the belt database can be edited by:

•The data can be changed in each cell.

•To insert a new idler, click on a position in the list, depress the Insert button, edit values to suit.

•To delete a idler, click on the idler and then depress the Delete button.

•The changes are saved by depressing the Apply button.

•The changes are saved and the routine exited by depressing the OK button

•The changes are ignored and the routine exited by depressing the Cancel button.

When the idler database is changed, there is no return to the previous data; nor is there a way to determine what has been changed. The user should always verify the accuracy of the idler data being used.

The following information can be entered on available idlers:

•The Description is a user supplied name for idler. [required]

•The Model description is another user supplied name for the idler. If no information is entered, it will not be displayed in the idler specification. [optional]

This field can be used to specify a manufacturer model/part number.

•Service describes the use of the idler. If "not specified" is selected, it will be considered for any application. Otherwise, it will only be listed in the Idler Tab selection procedure for the selected use. [optional, default value is "not specified"]

•Load Rating [required].

•Angle specifies the angle from horizontal to the outermost roll. For multiple roll idlers, assume that the angle between adjacent rolls is equally distributed [required].

•Number of Rolls  [required]

•Belt Width  [required]

•Roll Diameter: assumes all rolls have same diameter.  [required]

•Roll Length specifies the length of the rolls. For multiple roll idlers, assume that the rolls are symmetrical about the center. [optional, if value of zero is entered, each roll will have estimated length of belt width divided by 0.9 divided by the number of rolls]

•Rotating Weight  [required]

•Weight  [optional]

•Roll Shell Material is a drop down list of generally available materials. [optional, default value is "not specified"]

•If the Bearing Type is "not specified", it can be selected in the Idler Tab selection procedure; otherwise, it cannot be changed. [optional, default value is "not specified"]

•Seal Drag - Kis is seal torsional resistance per roll (this value is related to the alternate notation of "Ai" which is equal to Kis divided by the Radius of Roll   [required]

•Load Factor - Ciw is idler rotating resistance load factor.

•L10 Hours Rating  [required]

The database is automatically arranged in order of increasing description, belt width, angle, roll diameter and number of rolls.

See also: Idler Specifications, Idler Database Considerations, Idler Alignment.