What is the use of Johansson Mikrokator?

What is the use of Johansson Mikrokator?

A Johansson Mikrokator (also called Abramson’s movement) is a mechanical comparator used to obtain mechanical magnification of the difference in length as compared to a standard. It works on the principle of a button spinning on a loop of string.

What is a Sigma comparator?

The sigma comparator is a mechanical comparator which is used to compare the roughness or flatness of a workpiece with a standard or an another workpiece.

What is mechanical comparator?

(microcator), a measuring instrument whose mechanism is in the form of a tape spring twisted in the middle part, which rotates through a definite angle upon tension (Figure 1). It is used for linear measurements by the relative contact method.

What is a pneumatic comparator?

A pneumatic comparator is a precision device operated using a pneumatic system or compressed air. Like other mechanical, optical, and electrical comparators, pneumatic comparators are also used to analyze the dimensional difference between the workpiece to be measured and the standard workpiece.

What is the advantage of mechanical comparator over others?

What is the advantage of mechanical comparator over others? Explanation: Mechanical comparator is cheaper as compared to others. Mechanical comparators have more moving parts due to this friction is more and accuracy is less. External supply is not required.

What is go limit?

Explanation: ‘Go limit’ deals with upper limit of shaft and lower limit of hole and refers to the maximum material condition. ‘No-go’ limits deals with lower limit of shaft and upper limit of hole and refers to the minimum material condition.

How does a Sigma comparator work?

Working Principle of Sigma Comparator: The plunger is fitted through the slit diaphram to give a frictionless surface. When the plunger is pushed upward due to the uneven element it displaced the knife-edge either upward or downward. The knife-edge is fitted with the moving block using a Saphire bearing block.

What are the types of comparator?

Types of Comparators

• Mechanical Comparator.
• Mechanical-Optical Comparator.
• Reed Type Comparator.
• Electrical-Electronic Comparator.
• Pneumatic Comparator.

What is advantage of mechanical comparator over others?

What is the advantage of mechanical comparator over others? Mechanical comparators have more moving parts due to this friction is more and accuracy is less. External supply is not required. Moving pointer moves over a fixed scale hence error due to parallax is possible.

Are the two types of comparator?

Based on the method of magnification, the comparators are classified as follows: Mechanical Comparator. Mechanical-Optical Comparator.

What are the advantages of a pneumatic comparator?

Advantages of Pneumatic Comparators A high degree of magnification is possible. No wear takes place on the workpiece due to no contact of the comparator to the workpiece. High accuracy can be achieved due to very few moving parts. Suitable to measure the diameter of holes.

What are advantages & disadvantages of mechanical comparators?

It is usually robust, compact and easy to handle. There is no external supply such as electricity, air required. It has very simple mechanism and is cheaper when compared to other types. It is suitable for ordinary workshop and also easily portable.

What can a Johansson Mikrokator be used for?

Mechanical measurements and Metrology. A Johansson Mikrokator also called Abramson’s movement is a mechanical comparator used to obtain mechanical magnification of the difference in length as compared to a standard. Bellcranks are also seen in applications, as part of the linkage connecting the throttle pedal to the carburetor.

When does Johansson Mikrokator output the most negative voltage?

Wikimedia Commons has media related to Johansson mikrokator. When the non-inverting input is at a higher voltage than the inverting input, when the non-inverting input drops below the inverting input, the output saturates at the most negative voltage it can output.

How is the Mikrokator used to measure length?

The Mikrokator is an instrument for measuring differences in length. The Mikrokator principle greatly magnifies any deviation in size so that even small deviations produce large deflections of the pointer over the scale. The transference of movement from the measuring tip to the pointer is mechanical, completely frictionless and free from backlash.

Is it possible to repair a CEJ Mikrokator?

A.A. Jansson will continue to repair CEJ Mikrokators as long as parts. The next quality standard in the hierarchy is known as a secondary standard, secondary standards johanssonn calibrated with reference to a primary standard.