Differences

This shows you the differences between two versions of the page.

--- dial_caliper [2014/09/24 11:40]
nathalie
+++ dial_caliper [2018/10/02 23:47] (current)
gerry
@@ Line 3: / Line 3: @@
 {{:lecture:caliper.jpg?200|}}
-  * **Description**: A low cost version of a precision tool. A six inch model with a thumb wheel is recommended. Battery-powered digital read outs are not required or recommended.
+  * **Description**: A low cost version of a precision tool. A six inch model with a thumb wheel is recommended. Battery-powered digital read outs are not required. Battery-powered digital calipers have the disadvantage that they don't work when the battery is dead, which can happen when the caliper is stored unused in your toolbox.
-  * **Purpose**: To measure parts to within 0.001 inch, usually to inspect or verify dimensions.
+  * **Purpose**: To measure parts to within 0.001 inch, usually to inspect or verify dimensions.  We will use calipers to measure parts so that we can create accurate CAD models.
   * **Source**: Various sources, online or local. At www.harborfreight.com, see item number 66541. Other options are at home depot, or a search for "dial caliper" at Amazon.
-  * **Approximate Cost**: $20 and up.
+  * **Approximate Cost**: $20 and up.  A $20 dial caliper is sufficient for this course.
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ME 120