One of the most discussed questions is: "What degree of web tension is recommended to use on the machine?" (in this article, the words "tension" and "tension" are used synonymously and characterize the force that supports the web on the pulleys and thereby strengthens the cut).
This is one of the difficult questions that needs to be answered correctly.
The correct answer lies in the condition of the minimum effort needed to support the web on the pulleys and prevent it from sliding on them.
Very high tension will lead to an early rupture of the canvas.
The pressure must be taken in the range of 25,000-28,000 pounds per square inch of the web.
By what principle was this calculated?
Nowadays, this parameter is calculated by the machine designer, and the machine operating instructions simply require you to keep the web stretched, the pressure should be about 90 psi at normal atmospheric pressure, or you will need to increase the pressure in the tension cylinder to 2,300 on the indicator or as much as necessary.
For the operator of a band saw machine, there are two types of checking the tension of the web on the machine.
He must calculate the pressure per square inch, taking into account different indicators, or simply apply a simometer.
This device is very easy to use, it is necessary to measure the amount of voltage that acts on the canvas.
The device translates this data into readings on the scale.
The device will show you the voltage in pounds per square inch.
If we turn to the last part, then in addition to using the lowest required pressure, it is always necessary to reduce the tension of the web at the time of interruptions in work.
This will not bring the desired results if the canvas remains stretched during long breaks or after the end of your work shift.
This is especially important in the cold season.
During the sawing process, the web begins to heat up and stretch (the tension of the web is adjusted after it has warmed up).
After cooling down, at the end of a work shift or during breaks, the canvas decreases in length, and it even happens that it breaks because the tension of the canvas has not been weakened.
09 Martha 2017
