 | | Quality issue - update — Jake McKee
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| | | I've had a number of people ask me about a perceived quality issue lately: If you take a number of plates and create two or more large stacks, they tend to be differing heights. For example, Ben has posted some photos here: (URL) I mentioned that (...) (20 years ago, 30-Jun-04, to lugnet.lego, lugnet.color, lugnet.general, FTX) !
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| | | | | Re: Quality issue - update —Christian Treczoks
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| | | | | (...) When I check sets and brick I've bought in the last 12 months, I perceived several quality issues I never noticed in the years before. Not only Bens and Juergens plates, but also breaking bricks, bricks with "wrong" grip (Studs too small, (...) (20 years ago, 30-Jun-04, to lugnet.lego, lugnet.color, lugnet.general)
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| | | | | Re: Quality issue - update —Larry Lesser
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| | | | | Jake, I have no problem with the quality. From time to time there will always be parts that are not perfect. Take for example the 1 dot color parts. Sometimes a part has the bottom broken or cracked. While other times they don't. It happens. We are (...) (20 years ago, 30-Jun-04, to lugnet.lego, lugnet.color, lugnet.general, FTX)
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| | | | | Re: Quality issue - update —Scott Arthur
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| | | | | (...) Or >6%. I "perceive" that as being quite high(?). ;) (...) Surley advances in technology should have enabled tolerances to be improved? (...) I feel a group hug coming on. Scott A (...) (20 years ago, 30-Jun-04, to lugnet.lego, lugnet.color, lugnet.general, FTX)
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| | | | | Re: Quality issue - update —Thomas Main
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| | | | | (...) Well, perception is everything. It is a quality issue for people who build with Lego; it is not a quality issue for the Lego Company's Quality Assurance department. (...) I perceive this as a problem for a company making parts that supposedly (...) (20 years ago, 30-Jun-04, to lugnet.lego, lugnet.color, lugnet.general, FTX)
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| | | | | | | Re: Quality issue - update —Scott Arthur
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| | | | | | (...) That’s nothing. My “(URL) Lego Book>” (Foreword by KKK himself) tells me that in 1963 ABS allowed moulding precision to 0.005 mm (0.0002 inches). Scott A (...) (20 years ago, 30-Jun-04, to lugnet.lego, lugnet.color, lugnet.general, FTX)
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| | | | | | | | Re: Quality issue - update —David Eaton
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| | | | | | (...) I've got yet another doc (not sure of the source-- was emailed to me as an Offical 'standard Lego FAQ' sorta thing) that reports: "The precision molds are made at two LEGO factories in Germany and Switzerland. They are precise to (...) (20 years ago, 30-Jun-04, to lugnet.lego, lugnet.color, lugnet.general, FTX)
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| | | | | | | | Re: Quality issue - update —Scott Arthur
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| | | | | | | (...) I think you mean 0.005? (ie the same as the ULB above). Anyhow, the precision of molds may not be the same as moulding precision? Scott A (...) (20 years ago, 30-Jun-04, to lugnet.lego, lugnet.color, lugnet.general, FTX)
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| | | | | | | | | Re: Quality issue - update —David Eaton
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| | | | | | | | (...) Doh, typo. Yeah, as Calum also pointed out, that may indeed be another great source of confusion as to the parts vs. the molds. Makes me curious to know what level of precision MegaBloks, etc use for their molds. I haven't done too much with (...) (20 years ago, 30-Jun-04, to lugnet.lego, lugnet.color, lugnet.general, FTX)
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| | | | | | | | Re: Quality issue - update —Calum Tsang
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| | | | | | (...) First, what ABS can allow moulding to is different than what the company targets. Precision costs money. Decrease the tolerance, and you increase the cost, because more rejects are made. Also, the mold tolerance is different than the part (...) (20 years ago, 30-Jun-04, to lugnet.lego, lugnet.color, lugnet.general, FTX)
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| | | | | Re: Quality issue - update —Erik Olson
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| | | | | Thanks for the tip about stacking plate tolerances, Jake. A related effect occurs with some 1x2 bricks (first obvious to me with sand red). The crack between bricks in a wall depends on which way the 1x2 are pointing. One end of each brick is a (...) (20 years ago, 1-Jul-04, to lugnet.lego, lugnet.color, lugnet.general, FTX)
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| | | | | Re: Quality issue - update —Mark Bellis
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| | | | (...) For storage I stack my 2x3 plates with 3 studs along one edge overlapping. There is a 3mm difference in height between two stacks of 38 2x3 plates. This is within the tolerance you quoted of 3.2mm +/-0.1mm, since 3mm/38 = 0.0789mm per plate. I (...) (20 years ago, 3-Jul-04, to lugnet.lego, lugnet.color, lugnet.general, FTX)
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| | | | | | Re: Quality issue - update —Sy Dean
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| | | | | (...) Hmm. In the realm of tangential anecdotal evidence, I bought the Mini-Robots (4097) set. I noticed that many of the 1x1 elements coming with the set, such as cylinders, 1x1 bricks with technic holes, headlight bricks, etc seemed to be having (...) (20 years ago, 4-Jul-04, to lugnet.lego, lugnet.color, lugnet.general)
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| | | | | | Re: Quality issue - update —Ross Crawford
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| | | | (...) OK so I just went to my box of childhood LEGO (circa 1970-80) to check this out. Discounting the CA bricks which have known deterioration problems, I put together 4 stacks of 10 ABS bricks, 2 red and 2 white. I made sure I picked out the "best (...) (20 years ago, 4-Jul-04, to lugnet.lego, lugnet.color, lugnet.general, FTX)
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| | | | | | Re: Quality issue - update —Scott Arthur
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| | | | | (...) If exact brick size variation tends towards(1) a normal distribution there will be equal numbers of oversized and undersized bricks. Measuring the length of a “stack” of bricks will basically cancel out any error. Scott A (1) I say “tends (...) (20 years ago, 5-Jul-04, to lugnet.lego, lugnet.color, lugnet.general, FTX)
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| | | | | | | Re: Quality issue - update —Mark Bellis
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| | | | | | | (...) Have you accounted for common mode error? Many bricks are produced by the same mold. If 12 2x4s are produced per machine cycle, then 1 in 12 will be from the same part of the mold. The randomness of the distribution depends how many machines (...) (20 years ago, 5-Jul-04, to lugnet.lego, lugnet.color, lugnet.general, FTX)
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| | | | | | | Re: Quality issue - update —Ross Crawford
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| | | | | | (...) Agreed, with a large enough sample size. I hardly think 10 bricks (or even 40) would be enough to cancel out all such errors. Besides, if my stacks reduced the error, doesn't that mean the older bricks are actually likely to have worse (...) (20 years ago, 6-Jul-04, to lugnet.lego, lugnet.color, lugnet.general, FTX)
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| | | | | | | | Re: Quality issue - update —Scott Arthur
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| | | | | | (...) You are correct; I should have worded that a little better. ;) Scott A (who thinks this would make a good high school sats project) (...) (20 years ago, 6-Jul-04, to lugnet.lego, lugnet.color, lugnet.general, FTX)
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| | | | | | Re: Quality issue - update —Rob Antonishen
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| | | | (...) I was making up some 1/2 scale blocks (2x2 tile on 2x2 brick on 2x2 plate) the other night and randomly pulled out some of my old "childhood-era" (mid 70's) 2x2 bricks, and noticed the absolutely horrible quality control it shows... (URL) (...) (20 years ago, 9-Sep-04, to lugnet.lego, lugnet.general, lugnet.org.ca.rtltoronto, FTX)
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| | | | | | Re: Quality issue - update —Reinhard "Ben" Beneke
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| | | | (...) snip (...) snip (...) Hi all! I know this thread is really old, but eventually I came across this discussion while uploading a few more new quality issue pictures ast brickshelf: (URL) new pictures of 2007 building session> So I just wanted to (...) (18 years ago, 3-Jan-07, to lugnet.lego, lugnet.general, lugnet.org.ca.rtltoronto, FTX)
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| | | | | | Re: Quality issue - update —Rob Antonishen
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| | | | | (...) Not suer how you come up wit that conclusion. These bricks are from my old sets, purchased in Canada between 1973-1978. I am suspecting these specific bricks came from set 256-1 released in 1976. I would doubt that these were 10 year old (...) (18 years ago, 3-Jan-07, to lugnet.lego, lugnet.general, lugnet.org.ca.rtltoronto)
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| | | | | | | Re: Quality issue - update —Reinhard "Ben" Beneke
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| | | | | | (...) Hi Rob, thanks for your feedback! In that case I would think these are US-made bricks, since the LEGO-logo on top of the bricks is of the old design. This has been used within Europe (= Billund made bricks) only in combination with CA-bricks (...) (18 years ago, 3-Jan-07, to lugnet.lego, lugnet.general, lugnet.org.ca.rtltoronto)
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| | | | | | | | Re: Quality issue - update —Rob Antonishen
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| | | | | | (...) That's an experiment that I will have to try when my collection is closer at hand :) -Rob A> (18 years ago, 3-Jan-07, to lugnet.lego, lugnet.general, lugnet.org.ca.rtltoronto)
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| | | | | | | | Re: Quality issue - update —Reinhard "Ben" Beneke
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| | | | | | (...) I would be interested in the result, Rob. Just for your information: CA has a much higher material damping coefficient in comparison to ABS. So CA will make less noise and sound very dump when it hits the ground. Especially for the classical (...) (18 years ago, 3-Jan-07, to lugnet.lego, lugnet.general, lugnet.org.ca.rtltoronto)
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| | | | | | Re: Quality issue - update —Rob Antonishen
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| | | | | (...) Not sure how you come up with that conclusion. These bricks are from my old sets, purchased in Canada between 1973-1978. I am suspecting these specific bricks came from set 256-1 released in 1976. I would doubt that ir contained 10 year old (...) (18 years ago, 3-Jan-07, to lugnet.lego, lugnet.general, lugnet.org.ca.rtltoronto)
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| | | | | | Re: Quality issue - update —David Eaton
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| | | | (...) I wouldn't assume that 1965 was necessarily as good as, say, 1990. But you're right insofar as quality from the 60's and 70's is not necessarily the same quality as the 80's and 90's. If someone's really looking for proof or disproof of (...) (18 years ago, 3-Jan-07, to lugnet.lego, lugnet.general, lugnet.org.ca.rtltoronto, FTX)
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