After a conveyor
has been in use for a period of time, it may be
necessary to make adjustments to the chain tension.
A loose chain can jump the drive sprockets and can
cause sprocket wear and failure. A tight chain
requires excessive motor power, and can cause chain
and sprocket failure. Chain tensioning can be done
adjusting the tensioner. If more adjustment is
required than can be done with tensioner adjustment,
then links should be added or removed as necessary
from the drive chain and the tensioner readjusted.
Generally the slack of the chain should be on
the lower side (See Figure 2). Adequate slack
(distance between A and B) is 4% of the span. |
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The
slack should be 2% of the span in the following
cases:
1. The Drive is vertical or close to vertical
2. The span is greater than 36 inches
3. The Chain is operated under heavy load and high
frequency of on-off cycles
4. The direction of the Drive is change often.
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