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Jakobud DK plan discrepencies.... other plans available?
rbarr110:
So I was in the process of re-creating the jakobud plans in AutoCAD, since it is much easier to print to scale in AutoCAD than trying to make a jpg or eps file print to scale.
Well in re-creating the plans using the dimensions there are lots of discrepencies, particularly in the height and radius of the arcs. For example, left side height added up is 64.75" and the right side adds up to 64.93".... not a huge difference but makes the precise autocad drawing way off. There is also one missing horizontal dimension...not a big deal but can be figured out by working up/down from all directions.... becomes a problem however when vertical dimensions are off.
See attached picture for particulars..
So after all that, are there other plans avaialble out there that I can try to reproduce for my own use.
http://i29.photobucket.com/albums/c271/rbarr110/Bar/donkeykong-sideLayout2bcopy.jpg
u_rebelscum:
I hear you. I've been trying to do a Pole Position cab in SketchUp from Jakobud's plans and a broken cab, and still run into some problems of not adding up.
However, to bring it into prespective, a quarter inch difference over a total of 64" is less than half a percent off. Not bad for hand messurements; in fact that's very good.
Part of the problem is the numbers shown on the plans probably are not really exactly 18.75" (or whatever), but something pretty close that it looks like that. Are the numbers with or without (rounded) T-molding? Were the vertical & horizontal calculated from angle + length, or plumb bob and right-angle?
Part of my problem is the original cab I'm going off of is damaged (the whole reason I'm recreating it), so sometimes I'm estimating plus or minus 1/4" over about one foot, and +/- 1/2" over three feet. That's closer to 2% and 1% range of error. I've tried fudging the numbers adjusting it in cad, but everything I've tried has looked a little off to me.
I'm not sure how good or bad the cab the numbers jakobud got was, but add the not-manufactured-at-easy-fractions to the hand measuring of possiblely bad cad, and 0.4% error isn't bad at all.
I know, not the answer you wanted. :-\ But just saying jakobud's plans are damn close, so try fudging it around in cad. And I'd rather have the raw, but doesn't add up, numbers, than numbers guestimated at so they do add up (but might be guestimated wrong) and passed off as prefect. (Some day I'll get off my backside and just do it, too. ;) )
King Nerd:
I think the discrepancy lies in the fact that I believe these cabinets were made in metric, while the measurements were made in imperial.
I don't know for sure, it's just a guess.
u_rebelscum:
--- Quote from: King Nerd on July 16, 2009, 06:55:47 pm ---I think the discrepancy lies in the fact that I believe these cabinets were made in metric, while the measurements were made in imperial.
I don't know for sure, it's just a guess.
--- End quote ---
I'd bet if the measurements were made in metric, the two vertical sides would be off by ~1/2%, too. I've tried measuring my cab in both metric and imperial, always ending a little off.
King Nerd:
I'll have to measure mine up. I've put it into CAD, so I can find out how CAD compensated for the discrepancy.
EDIT: First point of note, on your math of Jakobud's plans... on the back side (left) you missed a measurement at the top 0.75".
The left side should be at a height of 65.25", it still leaves you 0.32" off.
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