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Strategies & Market Trends : Technical analysis for shorts & longs

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Feb 6 4:00 PM EST

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To: xcr600 who wrote (32578)	6/1/2001 12:38:03 PM
From: Johnny Canuck	Read Replies (2) of 70561

x, I got one sitting down stairs in the lab. It is not as inexpensive as the article states. The lowest cost machine is close to $200,000 CND and there is a $15,000 CND per year service contract that goes with it. This is for models that you can actual use as opposed to models that you can look at but can't really touch. Most RP models are current used to check the fit and assembly of components rather than for true in the field test. It cost about $20 an hour to run the machine and a typical part like a telephone handset would be a few hundred dollars to make. A typical build might be 10 to 20 hours. Stratsys make a machine that can lay out ABS platic parts, but they are typical 70 to 80 percent the strength of injection molded parts. It also can make wax molds for the lost wax process and elastomeric parts. Stratsys makes the most durable parts as you can use it in every day use. Some of the other machines like Twenty-three make a less durable parts that are suitable only for very delicate handling. The best resolution I have seen in 5/1000's of an inch despite the claims of better resolutions. In some applications this is not good enough. The lower cost machines mentioned in the articles typical act like a printer as described, but the parts can not take rough handling. The desktop systems are typically like that. The materiald are getting better each day, but this is a technology is not ready to be put in your home just quite yet. Injection molded parts are still cheaper when your are doing production runs when you amortize the tooling cost over the duration of the run (typical years). Even with an RP machine we typical make a positive and then use a silicon casting technique if we are going to make a small production run. It is just more cost effective. Harry

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