LIMITING LENGTH OF THE OFFSET
The maximum length of the offset is generally determined from the view point that the error produced in plotting the detail on the drawing sheet is not very significant.
- Alternatively, the displacement of the detail on the drawing sheet should not be more than 0.25 mm from its correct position.
- The maximum length of the offset in fact depends on:
- The scale of the plot
- Error in the direction and length of a line
- The desired level of accuracy
Error in the Direction of Offset
Let an offset Pp is taken to the detail P from the running chain line at p. Let there be an error of a in the direction of Pp i.e. the offset makes an angle a with the true perpendicular and let l be the length of the offset.
When the offset is plotted on the drawing sheet, it will be plotted as pP1 and thus the actual point P gets displaced to P1. Draw perpendicular PP2 from P on the line pP1. Thus displacement along the chain line is PP2. This displacement is due to the error a and on the drawing sheet, this displacement should not exceed
The Equation can be used for calculating the maximum length of the offset so that maximum displacement on the drawing sheet does not exceed 0.25 mm.
<< Previous | Next >>
Must Read: What is Surveying?
Dear Aspirants,
Your preparation for GATE, ESE, PSUs, and AE/JE is now smarter than ever — thanks to the MADE EASY YouTube channel.
This is not just a channel, but a complete strategy for success, where you get toppers strategies, PYQ–GTQ discussions, current affairs updates, and important job-related information, all delivered by the country’s best teachers and industry experts.
If you also want to stay one step ahead in the race to success, subscribe to MADE EASY on YouTube and stay connected with us on social media.
MADE EASY — where preparation happens with confidence.
MADE EASY is a well-organized institute, complete in all aspects, and provides quality guidance for both written and personality tests. MADE EASY has produced top-ranked students in ESE, GATE, and various public sector exams. The publishing team regularly writes exam-related blogs based on conversations with the faculty, helping students prepare effectively for their exams.
