Help Me Solve My Engineering Drawing Mistakes!

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SUMMARY

The forum discussion addresses three significant mistakes in an engineering drawing submitted by a novice. The key issues identified include the need for distinct formats for vertical lines to allow for rotation, ambiguity in dimension units (millimeters vs. centimeters), and the necessity for both positive and negative angle deviations. Additionally, the notation "=210=" is questioned for validity, particularly in relation to inconsistent length measurements and the absence of a date or version number on the drawing.

PREREQUISITES
  • Understanding of engineering drawing standards
  • Familiarity with dimensioning techniques in technical drawings
  • Knowledge of angular measurement conventions
  • Basic principles of notation in engineering documentation
NEXT STEPS
  • Research engineering drawing standards and best practices
  • Learn about dimensioning techniques in AutoCAD
  • Study angular measurement and deviation in engineering contexts
  • Explore common notations used in engineering documentation
USEFUL FOR

This discussion is beneficial for engineering students, drafting professionals, and anyone involved in creating or reviewing technical drawings who seeks to improve their understanding of common mistakes and standards in engineering documentation.

Johnny26
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Homework Statement


There are 3 big mistakes in this drawing and I would really appreciate if anyone could help me find out exactly what those are. Thank you.


Homework Equations


Since I am new to engineering drawings, I can only make assumptions and would really appreciate if I am corrected rather than mocked.


The Attempt at a Solution


As far as I am concerned
1- The vertical line should be of a different format as it would not allow rotation if they are the same.
2- It is unclear what the dimensions are (whether they are in millimeters or centimeters etc)
3- The angles should have some negative deviations as well in addition to positive ones (if this one is incorrect, kindly explain it to me why)
4- (=210=) Is this a valid format as I am pretty sure it is not.
 

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Only had a quick look but:

1) the length is 420 on the drawing but "L=364" on the Dimensions block at the bottom.
2) I've not seen =210= used before but if it's a valid notation why isn't it =420= just below?
3) Date/issue/version number?
 
Uh ... one is that you misspelled mistakes :smile:
 

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