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Questions tagged [drawings]

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4
votes
2answers
7k views

What does an E in a circle after a diameter mean?

I’m pretty sure it’s something to do with the fitting, possibly specifying to use the minimum circumscribed or maximum inscribed circle to tolerance the diameter but I can’t remember. The tolerance ...
3
votes
1answer
1k views

How to draw isometric view of this shape?

I'm having trouble drawing an isometric view of this shape: I've only just started an engineering course and so far it's involved a lot of drawing which I usually can do but I can't seem to figure ...
3
votes
0answers
611 views

GD&T for Multiple Surfaces as Single Feature

I'm looking to get some collective agreement on a question that I have come across a few times now. When referring to features that are technically independent, what is the general consensus on ...
3
votes
1answer
420 views

How to model Motor Windings in Solidworks?

I want to model a DC motor in order to eventually do some simulations (temperature/cooling related) and I'm wondering what is the best way to model the motor windings? I've seen a few video's on how ...
2
votes
3answers
2k views

Technical drawing for a part with complex (non-line, non-arc) geometry

I've been making technical drawings for various parts I've designed. Since these parts were meant to be 3D printed, this is mainly just to have them in my portfolio so I have something to show/talk ...
2
votes
2answers
178 views

Coplanarity Profile Callout Confusion

From Krulikowski (1997), the callout for several coplanar surfaces using the Profile symbol is done by using two surfaces to establish datum plane A-B and then tolerancing the remaining coplanar ...
2
votes
0answers
22 views

Transferring the project from "Altium Design" to "SolidWorks" while maintaining silk-screen printing, sizes and everything else

I want to transfer the PCB project to solidwork from altium design, I read forums on how to do it better, and so: Save to STEP. The option is good and working, but I did not like the option, since ...
2
votes
0answers
41 views

What is this 'timber insert' on the construction drawing of a concrete parapet wall?

A sectional elevation of a concrete roof is shown below (drawing is from the early 70s): The roof slab is dimensioned as 6" thick with what appears to be 12" parapet wall with a 'Timber ...
2
votes
0answers
166 views

What is the minor diameter of a thread in terms of its nominal diameter and pitch?

I'm trying to find the formula for calculating the tensile stress area of a bolt. According to page 1528 of The Machinery's Handbook (29th Ed.), that formula is given as $$ A_S=\frac{\pi}{4}\left(\...
1
vote
5answers
125 views

How to choose tolerance size?

I can not really understand how people decide what tolerances to set for a part or assembly. For example: When can I choose 0.2 mm and when 0.002 mm; and if I choose 0.002, why didn't I choose 0.001 ...
1
vote
3answers
64 views

Why are there sometimes slash marks and sometimes arrows in dimension lines?

Sometimes, I see dimension lines drawn like this: Where there are extension lines and double-headed arrows between them. This is also how my textbook, Technical Drawing with Engineering Graphics, ...
1
vote
3answers
77 views

Finding the isometric view of an object from the front and right side view

I need to draw the isometric view and top section view of the object given only the front and right side view. I understand on how other edges of these views correlate with each other. I just do not ...
1
vote
1answer
130 views

Convert .dxf file to .svg

I'm an software dev and my job is to convert a .dxf file into a .svg file My code actually works, but there are some issues with the dimensions or something similar. Unfortunately, i have no ...
1
vote
2answers
79 views

How to Construct a Primary Auxiliary View given that an oblique surface with 6 sides

I need to construct the auxiliary views with the given front and right side orthographic views. The view is in third angle projection. I observed that there is an oblique surface so that perhaps I ...
1
vote
1answer
38 views

Is sphericity the same as profile?

I have to inspect a sphere on a CMM, and the standard states that the "Sphericity must be within 0.02mm". I am using a Zeiss CMM, and it does not have a 'sphericity' inspection method, but ...
1
vote
3answers
184 views

How to draw an arc through 2 known points and tangent to a line

I am using AutoCAD and I was trying to figure out how to draw a circular arc through 2 known point and tangent to a line. When I look at the circle tools I see the following options: When I look at ...
1
vote
2answers
180 views

In what (free) software can I draw bodies in a 3D coordinate system?

I'm looking for a software in which I can make images of this kind.
1
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4answers
58 views

How to place a sketch plane at a specific geometric location

My background drafting is structural bridge drawings. I had Inventor LT installed the other day and I have been playing with it to refamiliarize myself with it and get used to the differences between ...
1
vote
2answers
61 views

How would I convert a GPS system on a drawing to something like Google Maps?

I'll link an image to this question so it'll hopefully make a bit more sense. For some background, I'm sort of a "Jack-of-all-trades" tech guy for my family company. Problems often get ...
1
vote
2answers
53 views

How to communicate to keep original dimensions of a part in a technical drawing?

Example: let's say that I have a rectangular part that I would like machined. I'd like to cut it to change the length, but the width and thickness are fine as is. The width and thickness are not nice ...
1
vote
1answer
51 views

Document Feathering Tolerance on Drawing

I am recreating an engineering drawing package from old quotes for a large assembly. In the quote they say "All length edges not to exceed 1/32" deep feathering". For some context this is for a bunch ...
1
vote
1answer
44 views

eDrawings Displays Text Differently Than Spinfire

I am generating a very simple DXF file with the netDXF library. The DXF is a polyine box with text in the middle. When I open the file in SpinFire and DWG Trueview the text is centered (image with H ...
1
vote
1answer
80 views

Is there anything in BS 8888 regarding the scale of a section view?

If a section view isn't sufficient enough to show all details required, can it be at a larger scale than its parent view? Is there anything in BS 8888 regarding recommended scales in section views? ...
0
votes
2answers
41 views

Technical Drawing: Labelling a component that's not part of my design but integral to my system

I am creating a technical drawing of a system I created. Let's call my system, system X. System X is a mounting mechanism for already invented system Y. System Y is customizable, however, system X is ...
0
votes
1answer
4k views

Understanding hole specifications

I am trying to interpret the hole specifications in the attached diagram. What does each component mean? I understand what 'Thru All' means, does 4x mean 4 holes? What is the diameter of the hole? is ...
0
votes
1answer
163 views

New Part Number for every firmware update?

When developing an ECR/ECN process, the question of when to roll a rev vs. when to create a new part number must be answered. In researching this question, I've come across multiple sources that ...
0
votes
1answer
246 views

Engineering Drawing-Projection of intersection curve of two standing cones

I have this projection of two intersecting cones, and I am asked to draw the intersection curve of the two cones on the projection. What is the right way to do it?
0
votes
1answer
148 views

Show all sides of a solidworks part in a solidworks drawing

I'm new to solidworks, and I built my part and would like to put it into a drawing. Its a small square box-like base with one side of the base having holes in it. When I put my parts into the drawing, ...
0
votes
1answer
63 views

Help interpreting dimensions from this drawing

Why there are different dimensions for the same measurements on this drawing? For example 0.127mils and 0.097 mils pin to pin. Or highlighted 405 and 385 mils. I can't find anything on the datasheet ...
0
votes
1answer
256 views

What do the short parallel lines mean in a symmetrical value?

I was wondering if the short parallel lines at the ends mean anything?
0
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2answers
70 views

Technical Drawing Content

When producing a set of engineering drawings for products we tend to specify the materials used for the part in the notes. For example if it's a moulded part we'd specify PA6 GF20 and then the ...
0
votes
1answer
1k views

Fusion360 - How do I fill these sketch planes into a body?

How do I make this highlighted part of drawing a solid body so that I can than boolean / subtract it later? All of these faces / planes are connected.
0
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0answers
28 views

Conversion of orthographic projection to isometric projection [duplicate]

I'm new to engineering drawing, and I am having trouble drawing isometric projection from orthographic projections. Can someone give the steps/thought process behind this conversion? I can upload the ...
0
votes
0answers
29 views

What does the lower dimension mean?

4.3 is the diameter of the hole in mm. But I don't understand the 4- part. Usually that's like a screw size but I haven't seen it like this before. edit: as one commenter said I think it's just to ...
0
votes
1answer
40 views

Autocad start drawing away from the Z=0 (non-coplanar)

I'm having an issue when I draw some elements. They are been drawn away from the Z=0, is causing to be non-coplanar with other elements. So, I cannot make fillets or can find crossing points. I don't ...
0
votes
0answers
25 views

How do split drawings from this without losing their dimension Autocad

I have a dxf file converted to dwg (unit: millimeters). There are 6 different drawings in the same file, How do I split those to different sheet. I wanted to take their consumption, as they are going ...
0
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0answers
107 views

Is my tolerance stackup correct?

Major questions: Are 0.028 locating tolerances divided by two for left/right shift? Do overall drawing tolerances apply to a thru hole with a locating tolerance of 0.028 (max material condition)? If ...
0
votes
2answers
924 views

Read holes schematic drawing notation. How to? Particular case

I am asking here for your help and advice on how to read holes schematic notations. On the attached picture I've marked with a green color part of notation that I don't know how to read / understand. ...
-1
votes
2answers
3k views

Drawing isometric from two orthographic views [duplicate]

I'm having a trouble drawing this isometric shape. I hope to find the drawing for this shape. ( would be so grateful if it's drawn in that isometric cube where each square of the cube is one unit of ...
-1
votes
3answers
41k views

Top View,Front View,Left view and right view help [closed]

I have to draw the front,top,left and right views of a given solid objects without scaling them i.e freehand. I am much beginner in this drawings. So I am getting no idea of how the given solid object ...
-1
votes
1answer
144 views

Do drawing dimensions have to start from datum?

When specifying the depth of a cut, should the dimension start from the datum surface or from the surface where the cut will be made? In the example below, a cut of 5mm is made from the surface ...
-1
votes
1answer
111 views

visualization of intersection of two objects [closed]

This is from a design entrance that I am preparing for. I know it's a little different than a theoretical projection drawing that engineering books usually cover. It is more practical and ...
-1
votes
1answer
69 views

Drafting techniques for various views [closed]

I was looking at this previous question and I got bored and started drawing it up just for something to do. The image in the question shows a nice front view and an elevation/section as shown below. ...