Every features such as a corner or circle center has

Info iconThis preview shows page 1. Sign up to view the full content.

View Full Document Right Arrow Icon
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: ch as a corner or circle center has an extension line referencing it off. The dimension values are then placed in the chain or straight line form. Inst. Charbel Seif , Mech 220 01/05/13 4 Mech 220: 7th LECTURE Mech DIMENSIONING DIMENSIONING drawing dimensioning schemes- (1) chain dimensioning drawing Chain (point to point) dimensioning Principal advantages: 1) 2) Principal dis-advantages: Inst. Charbel Seif , Mech 220 1) Simple Saves drawing space Appears crowded when small features are used Lousy tolerance stackup 2) 01/05/13 5 Mech 220: 7th LECTURE Mech DIMENSIONING DIMENSIONING drawing dimensioning schemes- (1) chain dimensioning drawing Principal dis-advantages: Inst. Charbel Seif , Mech 220 Lousy tolerance accumulation (stackup) 01/05/13 6 Mech 220: 7th LECTURE Mech DIMENSIONING DIMENSIONING drawing dimensioning schemes- (1) chain dimensioning drawing Principal dis-advantages: Lousy tolerance accumulation (stackup) Possible remedy (yet not a good one): x Tolerance decisions are normally made by the design engineer whereas the drafter must place them correctly on the finish drawing according to standards. Inst. Charbel Seif , Mech 220 01/05/13...
View Full Document

Ask a homework question - tutors are online