How many rulers do I need to make a membrane switch?

Someone might say that the ruler that is so common in daily life is nothing unusual. A ruler, as long as a normal person, should know how to use it. But I found that in the process of making membrane switches, more than a ruler is needed.

First of all, let’s talk about the steel rulers that everyone knows. There are straight steel rulers and coiled steel rulers. Steel rulers are mainly used to measure the length and width of materials. Straight steel rulers are mainly used to measure small points of materials, while steel tape rules are mainly used to measure materials whose length and width are greater than one meter. The relative accuracy of the steel ruler measuring distance should generally not be less than 1/3000, which is a not too precise measuring instrument.

Then, I want to talk about the film ruler, is there anyone like me, when I first heard this product term, I thought it was strange. Film ruler is a more accurate measuring tool than steel ruler. In the use of membrane switches, film rulers are generally used for sample preparation to detect whether the manufactured product is consistent with the design template. Only in this way can we produce better and more accurate membrane switch products.

Finally, there is another measuring tool called a caliper. The accuracy of the caliper is relatively high, and it can be used to measure the thickness and cross-sectional area of ​​materials, and it can also measure hardware accessories and some small accessories. The general custom-made membrane switch factories will basically use it.