Having confirmed that the conveyor support is correctly aligned and that idler mounting holes on either side of the conveyor are both equidistant from the belt centre line and perpendicular to the belt line proceed to install the conveyor idlers as follows:
Ensure that the idler base is correctly positioned with respect to belt travel — confirm by means of belt direction arrow. Melco idler bases are designed to operate with the centre roll (in an offset idler) being closest to the conveyor tail end.