Examples of people who have no mechanical "feel" for things - PeachParts Mercedes-Benz Forum

Chris W. · #1 07-24-2011, 05:55 PM

I'll start with one. People who crank a valve open or closed HARD against the stop. As simple as a garden hose or a propane tank valve. The automotive equivalent is cranking the oil drain plug on insanely tight.

Rgds,
Chris W.
'95 E300D, 345K

engatwork · #2 07-24-2011, 06:42 PM

My wife is pitiful when it comes to mechanical things. Thankfully I love her for all the other things. I will say (proudly) that last week I talked her (on the phone) through jump starting the pickup

.

Hatterasguy · #3 07-24-2011, 08:44 PM

People who strip oil pan drain plugs, I mean come on its not that hard.

Local2ED · #4 07-24-2011, 10:02 PM

Quote:

Originally Posted by engatwork

My wife is pitiful when it comes to mechanical things. Thankfully I love her for all the other things. I will say (proudly) that last week I talked her (on the phone) through jump starting the pickup

.

Hope you instructed her to wear safety goggles.

Ara T. · #5 07-24-2011, 10:21 PM

It kind of annoys me when I see people hit the steering lock when turning, and keep on cranking the wheel hard against the stop.. you can usually hear the power steering pump squeal in displeasure

Angel · #6 07-24-2011, 10:39 PM

Quote:

Originally Posted by Ara T.

It kind of annoys me when I see people hit the steering lock when turning, and keep on cranking the wheel hard against the stop.. you can usually hear the power steering pump squeal in displeasure

+1

my wife does this, And worse- when she is exiting our Subaru wagon (which has frameless windows) she closes the door by pushing on the window glass (not the heavy metal door...) it kills me.

I also dont appreciate the 'throw it to the stops' mentality when it comes to 'consumer' control systems. I was with a Machine tool Controls EE (!!) when he rented a Lincoln Town car with auto climate control- it was summer and he just couldn't wait for the car to sense that it was hot inside, he *had* to push the fan to "RLY FAST" as soon as he started the engine...and then back it down manually about 5 minutes later- never putting it in 'automatic' mode (the way it was intended to work). And he was a controls guy...

Datums and 3-view drawings ? my layman's translation would be - it means that if you are machining a piece of metal (drilling holes, cutting edges straight...), you need to measure something multiple times from different places before you are sure that the hole/edge is in the correct place. Better design (using 1 datum) involves more effort on the part of the designer, but requires less thought and checking during production - which is the way it should be done.

am I close ?
-John

BodhiBenz1987 · #7 07-24-2011, 11:24 PM

People who accelerate into stop lights. I see it all the time ... and it's even worse when someone floors it to pass you as you approach a stop light.

Skippy · #8 07-24-2011, 08:57 PM

The friend who watched my '71 for me while I was overseas and couldn't tell that the transmission was slipping badly (due to him having run it out of fluid).

jplinville · #9 07-24-2011, 09:01 PM

Designers who use multiple datums on a 3 view drawing...

leathermang · #10 07-24-2011, 09:20 PM

Quote:

Originally Posted by jplinville

Designers who use multiple datums on a 3 view drawing...

Can you explain what that means ?
Is that something like someone saying ' they proved the null hypothesis ' ?
Something by definition they have done wrong if they are doing that ?

jplinville · #11 07-24-2011, 11:46 PM

Quote:

Originally Posted by leathermang

Can you explain what that means ?
Is that something like someone saying ' they proved the null hypothesis ' ?
Something by definition they have done wrong if they are doing that ?

My definition of "Mechanical Feel" translates to my trade as this...

Detail drawings in ACAD are generally done in a "3 view drawing", meaning 3 sides of the part are shown, so someone is able to machine the part and make it to print.

A "Datum" is a point on the part, usually a corner, where dimensions generate.

Someone who has no "Mechanical Feel", or mechanical experience will use multiple datums to dimension from for each view...meaning they will have some features dimensioned from the left side, some from the right side, some from the tip and some from the bottom. When this is done, it creates more work for the person machining the part, because they have to re-dimension the part to make it easier to machine.

Therefore, when someone lacks the "Mechanical Feel" they lack the experience to properly draw a part. They may be able to draw, but they cannot draw it in such a way that it can be made properly.

I hope that's clear as mud.

75Sv1 · #12 07-25-2011, 07:52 AM

Quote:

Originally Posted by jplinville

My definition of "Mechanical Feel" translates to my trade as this...

Detail drawings in ACAD are generally done in a "3 view drawing", meaning 3 sides of the part are shown, so someone is able to machine the part and make it to print.

A "Datum" is a point on the part, usually a corner, where dimensions generate.

Someone who has no "Mechanical Feel", or mechanical experience will use multiple datums to dimension from for each view...meaning they will have some features dimensioned from the left side, some from the right side, some from the tip and some from the bottom. When this is done, it creates more work for the person machining the part, because they have to re-dimension the part to make it easier to machine.

Therefore, when someone lacks the "Mechanical Feel" they lack the experience to properly draw a part. They may be able to draw, but they cannot draw it in such a way that it can be made properly.

I hope that's clear as mud.

I see your point as far as what you consider a datum. On ASME drawings you genrally have three datums, for Geometric Dimensioning and Toleranceing. Basically, you are dealing with a three dimensional or Cartesian cordinate system. So, usually two or three datums are needed. 'A' is usually the base, "B" locates in the 'X' plane or a hole and 'C' clocks the part or keep it from rotation. Mating surfaces usually have another datum. Usually, your dimensions come from 'B' or 'A'. On some parts, dimensions will be from another datum or feature. That signifies or keeps say bolt holes related to that feature. A good example would be bolt holes for a starter boss on a flywheel housing
Tom

jplinville · #13 07-25-2011, 06:41 PM

Quote:

Originally Posted by 75Sv1

I see your point as far as what you consider a datum. On ASME drawings you genrally have three datums, for Geometric Dimensioning and Toleranceing. Basically, you are dealing with a three dimensional or Cartesian cordinate system. So, usually two or three datums are needed. 'A' is usually the base, "B" locates in the 'X' plane or a hole and 'C' clocks the part or keep it from rotation. Mating surfaces usually have another datum. Usually, your dimensions come from 'B' or 'A'. On some parts, dimensions will be from another datum or feature. That signifies or keeps say bolt holes related to that feature. A good example would be bolt holes for a starter boss on a flywheel housing
Tom

For clarity purposes, I'll explain it as such...I'm an old school tool and die maker. I use manual machines to produce parts as needed for my projects, mainly because my employer is too cheap to buy newer machines. Our machines were state of the art in 1980...LOL

Anyway, when running holes spreads, I work off of one X,Y datum, or "0", if you will. The prints we are given, quite often have holes dimensioned from different surfaces. Holes on the left side of the part are dimensioned from the left edge, and the right side from the right edge, instead of having a corner as the datum. To produce it as dimensioned would add to the time to produce the part, because you would have to zero your read out a multitude of times.

Dimensioning it from one edge means you have one starting point, and all numbers come from that one point.

This is why I request part prints and such to come to me on a disk...I'll take a few minutes to re-dimension it in such a way that it's faster to produce. Other people don't care to think that far ahead in advance to find an easier way, and IMHO, take too long on the part.

Perhaps it's due to my years of experience in management and design that I try to find the easiest and best way to draw and dimension the part, because I know the information that the tool maker needs to produce the part.

I just call it common sense...do your job in such a way that the next guy down the line in the process can't make a mistake.

MS Fowler · #14 07-25-2011, 09:11 AM

Quote:

Originally Posted by jplinville

My definition of "Mechanical Feel" translates to my trade as this...

Detail drawings in ACAD are generally done in a "3 view drawing", meaning 3 sides of the part are shown, so someone is able to machine the part and make it to print.

A "Datum" is a point on the part, usually a corner, where dimensions generate.

Someone who has no "Mechanical Feel", or mechanical experience will use multiple datums to dimension from for each view...meaning they will have some features dimensioned from the left side, some from the right side, some from the tip and some from the bottom. When this is done, it creates more work for the person machining the part, because they have to re-dimension the part to make it easier to machine.

Therefore, when someone lacks the "Mechanical Feel" they lack the experience to properly draw a part. They may be able to draw, but they cannot draw it in such a way that it can be made properly.

I hope that's clear as mud.

I done some construction inspection for TARGET stores. You would love them. They have had it with plans that have too many dimensions on them---when they make a change, there are too many places where they have to change that dimension, and all the others that would now conflict. So they dimension everything only ONCE in the drawing set. You may have to search for it, bit the dimension you need is somewhere in the 30-40 sheet set of drawings. But when they revise the location of a wall by 6 inches, they only change the dimension; not the drawing.

Very intelligent on their part, IMO.

lutzTD · #15 07-25-2011, 09:15 AM

in high school I had the wires wrong on a chevrolet starter, I cranked it and the starter did not disengage. my mom didnt bat and eye and said "you turned the key to hard"