Introduction: How to Tear Down a Digital Caliper and How Does a Digital Caliper Work

Many people know how to use calipers for measuring. This tutorial will teach you how to tear down a digital caliper and an explanation of how does the digital caliper work.

Step 1: Prepare Your Digital Caliper and Phillips Screwdriver.

Prepare a digital caliper and a phillips screwdriver first. The size of the Phillips' head has to match the size of the screws on the back of the caliper.

Step 2: Tear Down

Unscrew four screws on the back on the caliper with Philips head screwdriver. After that, you will see the chip behind the back bracket. The chip also has four screws and unscrews those as well.

Step 3: Finish

After all the screws are take out of the caliper, you will see the finish as the figure presents. All the caliper parts all shown.

Chip with the LCD display Brackets with the sliding wheel Main scale. Screws. (Battery, this one is broke and does not have a battery) The most important part would be the chip.

Step 4: Summary and Expliantion

Like the previous step explained, the chip is the most important part of a digital caliper. The digital caliper is an open-loop control system. From here, one might ask: what is an open-loop control system. An open-loop system is a control system that only has individual inputs and outputs which most the inputs depend on the user's desires.

Figure 2 shows the copper pads on the scale of the digital caliper which for the one I tear down is behind the scale. The grid on the copper pads has many conductive plates which are the forms of capacitors. Once someone is trying to use the digital caliper and the wheel on the caliper is moving, the whole part of the caliper will move and the chip stars moving as well. As the sliding jaw travels along the main scale, the back of the chip and the cooper grid will generate certain amount of capacitance. The amount of capacitance generated will send to the chip. It will do the calculation of the distance valve and display the reading on the LCD display. Reference: