[AT] tractor hauler a pain to install headlights.

[Henry Miller]

There are programs to check for the fit. They have models of different arms and hands so that this can be checked. The programs are somewhat expensive, but nothing compared to the cost redesigning everything when something doesn't fit. It probably cost us a quarter million dollars just because an extra large cup in the cup holder would be hit by the overweight operator when (snip a dozen other specific things putting everything at the right limits...) and there we could fix it by making the cup holder smaller, but we still had to pay the engineers to rerun the program after the redesign just to make sure that the new cup holder wouldn't affect something else unexpected. 

Is it worth it? Sometimes we wonder. 

-- 
 Henry Miller
 hank at millerfarm.com



On Thu, Jan 16, 2020, at 12:43 AM, Dennis Johnson wrote:
> Most larger automotive companies and engine companies use ProE cad programs. 
> Cad programs do not cause clearance or maintenance issues. These programs just allow the operator to make poor designs quicker than old days with tee squares.
> 
> Dennis
> 
> 
> Sent from my iPhone
> 
>> On Jan 15, 2020, at 12:15 PM, Stephen Offiler <soffiler at gmail.com> wrote:
>> 
>> 
>> Interesting comments on screen sizes James. I've got a dual monitor setup, 27" in front of me and 21" just to the right. When doing CAD work, it's mostly done on the main screen, with the smaller one containing notes, word processor, internet browser, calculator, useful tools along those lines. But to comment on scale: A practical problem I run into is with small parts. It is a basic functionality of CAD to zoom, pan, and rotate the part or assembly on screen. You can take a tiny part and fill the screen with it and lose appreciation for scale very quickly. 
>> 
>> SO
>> 
>> 
>> On Wed, Jan 15, 2020 at 12:32 PM James Peck <jamesgpeck at hotmail.com> wrote:
>>> When vehicles were designed on the board, they drew in 1/2 scale. You could look at a drawing and relate it to reality. If you taped a drawing to a wall, you could get a sense of the vehicle size. If a designer had a full size or 1/2 size CAD screen, those inaccessible places would be much more noticeable. People doing 3D solid modelling sometimes have multiple screens, one for each view. It would be difficult to design anything on a smart phone screen. It is not much easier on a small monitor. Monitors do continually get larger, just like TV screens.
>>> 
>>>  Some years ago I read some issues of a then DaimlerChrysler employee newsletter. One article covered a group that real world verified that all maintenance operations could be performed on a new model. If the maintenance could not be performed, the group would have to design a specialized tool or get a tool manufacturer to design the tool and offer it for sale.
>>> 
>>>  They did all this after the vehicle had been designed and production was imminent. I am guessing that moving heaven and earth would be easier than getting the product design changed.
>>> 
>>>  Toyota which emphasizes production efficiency not product design may not do it any differently.
>>> 
>>>  Cecil Bearden AT List member, Oklahoma farmer, and Professional Engineer (crbearden at copper.net); <snap> This is the problem of designing with AutoCAD and those other computer drafting programs. The designer has no idea of the clearance in the finished product. <snip>
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