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Author: Frank_Moran, Contributing Editor
| A Proportional Caliper, such as the image to the right, is a precise tool used in enlarging or reducing 3 dimensional measurements. The instrument consists of a small caliper diametrically opposed to a large caliper and held together with an adjustable wing nut. Enlargements up to 5 times and reductions up to 1/5 size are possible as well as inverted measurements can be made with most professional calipers, but they can be quite expensive. |  |
| A low cost alternative to purchasing this relatively high priced tool with 3 ratio choices of 1:2, 1:3 and 1:4 can be handmade and will work quite effectively. This handmade caliper can be used for taking a few key measurements on a live model and transferring them to your smaller scale sculpture or conversely point up a Maquette to a larger size sculpture. An example of usage would be; if you have a 6' model you want to sculpt 18" high, set the adjusting screw to the 1:4 setting and everything you measure on the model with one end will transfer to the sculpture in scale on the other. |
Parts needed:
Tools needed:
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| Accuracy is important, as this is a measuring tool. |
| On the next page, follow each step and soon you will have a inexpensive caliper you will enjoy for many projects to come. |
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