Table of Contents
How do you show drawing revisions?
Revision columns are located in the upper right corner or next to drawing the title block. Revision columns include the revision letter of the drawing, a short description of the changes made between this revision and the prior one, and the date the revision was made or the revised drawing was approved.
What should be done to revised drawings?
Changes may be made by adding, deleting, or crossing out the information or by re-drawing the drawing. Depending on the circumstances, drawing may be redrawn either with or without change.
What are drawing revisions?
The term “Drawing Revision” refers to modifications that are made to a drawing after it has been signed and issued. The first revision to a drawing takes place after the initial issue of the drawing is signed and released for bid or construction.
How do you analyze engineering drawings?
Title block Name and address of the company or agency who prepared or owns the drawing. Part number and description. Material. Mass. Finish. General tolerances. Projection details. Scale used in the drawing.
What is an engineering revision?
Revision control for manufacturing companies is managed through engineering changes, which are also known as engineering change orders (ECOs). Revisions are used to manage pending and released changes to parts, assemblies, software, drawings, and other documents.
How is a half scale drawing written?
Half scale is 1:2. It is helpful to think of this as one unit on the drawing equals two units on the object. A small object can be enlarged on the paper and drawn in 2:1 scale. For example, 1:50 scale equals one-fiftieth (1/50) full size–or 1 millimeter on the drawing equals 50 millimeters in reality.
What letters should not be used for revisions?
All letters can be used as revision letters except I, O, Q, S, X and Z. These letters are not allowed because they can be mistaken for numbers or for other letters. For example, a revision letter I can be mistaken for a 1 while an S can be mistaken for a 5.
What is the purpose of revision number on the drawing?
As the component or system is modified, and the drawing is updated to reflect the changes, the revision number is increased by one, and the revision number in the revision block is changed to indicate the new revision number.
When should I change my revision number?
The Revision number is changed manually when the document itself undergoes a significant change. This is to ensure that anyone with a hard copy or local copy knows when they need to update their copy.
What is the difference between version and revision?
A version is an iteration, something that is different than before. A revision is a controlled version. Webster’s dictionary describes a “revision” as the act of revising, which is to make a new, amended, improved, or up-to-date version.
What is ISO in engineering drawing?
ISO 128 is an international standard (ISO), about the general principles of presentation in technical drawings, specifically the graphical representation of objects on technical drawings.
What are the two elements of engineering drawing?
The two broad types of projections, both with several sub- classifications, are parallel projection and perspective projection. Projections. Orthographic projections: are drawn as multi view drawings, which show flat representations of principal views of the subject.
How do you revise engineering?
Read through the following tips that will hopefully help you pass an exam in an easier and calmer manner! Study. Make a plan. Avoid distractions! Handwrite all the revision notes. Learn to use your calculator! Do past papers! Have a group revision session. Bring a watch to the exam.
What are engineering drawing standards?
Conventions are essential for clear, unambiguous written, oral, and graphical communication. Drawings are used by engineers and manufacturing technologists to communicate their ideas and hence good engineering drawings follow conventions which are referred to as drawing standards.
How do you work out scale drawings?
The scale is shown as the length in the drawing, then a colon (“:”), then the matching length on the real thing. Example: this drawing has a scale of “1:10”, so anything drawn with the size of “1” would have a size of “10” in the real world, so a measurement of 150mm on the drawing would be 1500mm on the real horse.
How do you convert scales to drawings?
Drawings can be scaled up or down using either a calculator or a scale rule. To scale a drawing using a calculator: divide the measurement by the scale if you want to reduce the drawing in size, or. multiply the measurement by the scale if you want to increase it in size.
What is reducing scale?
Explanation: Enlarging scale means that the drawing is drawn with the bigger dimensions in comparison to the actual dimensions of the object. A representative fraction of 1:0.2 means 5:1, i.e. the drawing is five times bigger than the actual object. Hence the scale is enlarging scale. 3.
What is a revision cloud?
Revision cloud is an annotation type that lets you create cloud-like shapes in a drawing. Use revision clouds to call attention to geometry changes. You can insert revision clouds in drawing views or on the drawing sheet.
Which of the following should be in a title block?
To summarize, the title block should generally contain the following information: Name of the consultant, company, or organization with address and phone number. Title of the drawing. This is an identification of the project by client name, company, or project name.
What is a revised document?
This means a document that has been changed and created as a new version. You can “revise” an essay, a price estimate, an email, a schedule, or other similar documents.
What is the revision number?
The revision number is the number of times the document has been saved. That means it should correspond to the Date Modified field in the file manager, sometimes called Date Last Saved.
