Assembly 5
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5-6
NOTE: It is important to ensure the belt is engaging correctly into the toothed
sprocket with one belt tooth per sprocket tooth. Failure to do this will result in
damage to the belt.
Now the fixing bracket (29) at the left hand end can be fitted and the belt tensioned.
This is achieved by loosely fixing the bracket and then tensioning is achieved by
winding the adjusting screw (30) at the left hand end until the belt is tight.
The belt tension should be such that the belt stretches 10mm. This can be
measured by adjusing the clamping block so that the belt is pulled straight but
not tight. Note the clamping block position. Now adjust the adjusting screw
until the block has moved 10mm. This is the correct tension.
NOTICE: In the first weeks of operation, the timing belts of both axes
may need re-tensioning due to some initial stretch in the belts.
5.2.1.4 Fitting Y Axis Drive Belt
The Y Axis drive belt is transported assembled but un-tensioned. The end fixing and
tensioning brackets (32) for the Y Axis belt are released and re-positioned for
transportation so as to allow them to fit in the container.
Simply release the fixing socket head screws (31), turn the belt clamp support
brackets (32) down into the horizontal position and tighten firmly.
The front belt clamp (33) has an adjusting screw for tensioning the belt. The belt
clamping bolts should be just loosened and the adjusting screw tensioned so that the
belt has 10mm of stretch as per the procedure in 5.2.1.3 for the X axis tensioning.
29
30
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