english 
Pneumatic rotary actuators are generally
considered to be relatively easy to calibrate, depending on the specific type
and design. Here's why:
Simple Mechanical Design: Many pneumatic
rotary actuators have a straightforward mechanical structure, such as a rack -
and - pinion or vane - type design. This simplicity makes it easier to
understand and access the components that need calibration. For example, in a
rack - and - pinion actuator, the relationship between the linear motion of the
piston (connected to the rack) and the rotational motion of the output shaft
(connected to the pinion) is relatively direct, allowing for easier calibration
adjustments.
Limited Calibration Parameters: The main
parameters that usually need calibration are the rotation angle and sometimes
the torque. Compared to more complex electromechanical or hydraulic systems,
pneumatic rotary actuators have fewer parameters to deal with. Adjusting the
rotation angle can often be achieved by simply setting the travel limits of the
piston or using mechanical stops, which are relatively easy to access and
adjust.
Use of Standard Tools and Equipment:
Calibrating pneumatic rotary actuators typically does not require specialized
or highly expensive tools. Basic measuring tools like rulers, protractors, and
pressure gauges are often sufficient to perform the necessary measurements and
adjustments. For example, a pressure gauge can be used to ensure that the air
pressure supplied to the actuator is within the correct range, which is crucial
for accurate operation.
However, it's important to note that the
ease of calibration also depends on the installer's familiarity with the
actuator and adherence to the manufacturer's instructions. With proper knowledge
and following the correct procedures, most technicians can calibrate pneumatic
rotary actuators with relative ease.
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