Checking of a drawing is one of the important duties of a drafter. Whenever possible, it should be done by someone who hasn’t worked on the drawings.
- The first thing to do is to see if the drawing can be easily used without difficulty, and to see if the parts will fit and operate properly. There has to be clearance for all moving parts.
- Then see if the right amount of views are drawn to completely to define all the parts, and that all dimensions necessary for machining and assembling or erecting are given and are properly located.
- Check the correctness of all figures by use of the scale and by computation.
- All notes should contain a clear statement and be carefully located. Standard parts should be used where possible.
- See that the fewest number of different sizes of bolts and similar small parts are used. Consider the materials that the parts are made of, the construction of the patterns and cores, and the method of machining, milling or cutting.
This post is definitely quick and right to the point. I can see why it would be important for someone who hasn’t worked on the drawings to check & proof the drawings. Regular – just for the fun of it – drawings are one thing, but when it comes to dealing with drawings that will be used to ensure the correct assembly of a finished product, the onus is definitely in the details… Details that may be slightly off & simply need a second set of eyes to identify.
Each of the steps above are critical, but when dealing with moving parts steps 1 & 3 are crucial. You simply cannot get by with pieces that are not the correct size or that do not allow for proper movement between the corresponding pieces.