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Digital impression scan
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<blockquote data-quote="paulg100" data-source="post: 263977" data-attributes="member: 1643"><p>whats the xy accuracy of your printer? not the minimum spot size but the accuracy? and is it the same across the whole plate? does your printer manufacturer even publish it? what resin are you using, what is your post curing protocol? how is the part supported on the build plate and at what angle, how thick is the part? on and on and on. so many variables its crazy.</p><p></p><p>Shrinkage with a good class 4 die stone is what.. 0.06%?</p><p>good resin 0.5% with the wind blowing in the right direction and all the stars aligning?</p><p></p><p>are the "big" labs using a 6 figure $ printer, or a bunch of ****ty form 2's?</p><p></p><p>last case I see on a printed model was a snoring appliance like a chrome. the lab was sent a stone model. they decided to scan the model, then design digital and print a copy of the model. appliance came back on printed model. didn't go anywhere near the original plaster model.... about sums up 3d printed models for accuracy. best thing is i guess the lab didn't even bother to check it on the plaster model before sending it out.</p><p></p><p>I'm hoping to print models for diagnostics, maybe some stuff for vacuum formed appliances etc, but crown and bridge work, id forget it for now. betime you work out that it dosent work, your going to risk loosing half your clients.</p><p>or maybe your planning to find a select account whos prepared to go through the problems with you before letting loose on your client base?</p></blockquote><p></p>
[QUOTE="paulg100, post: 263977, member: 1643"] whats the xy accuracy of your printer? not the minimum spot size but the accuracy? and is it the same across the whole plate? does your printer manufacturer even publish it? what resin are you using, what is your post curing protocol? how is the part supported on the build plate and at what angle, how thick is the part? on and on and on. so many variables its crazy. Shrinkage with a good class 4 die stone is what.. 0.06%? good resin 0.5% with the wind blowing in the right direction and all the stars aligning? are the "big" labs using a 6 figure $ printer, or a bunch of ****ty form 2's? last case I see on a printed model was a snoring appliance like a chrome. the lab was sent a stone model. they decided to scan the model, then design digital and print a copy of the model. appliance came back on printed model. didn't go anywhere near the original plaster model.... about sums up 3d printed models for accuracy. best thing is i guess the lab didn't even bother to check it on the plaster model before sending it out. I'm hoping to print models for diagnostics, maybe some stuff for vacuum formed appliances etc, but crown and bridge work, id forget it for now. betime you work out that it dosent work, your going to risk loosing half your clients. or maybe your planning to find a select account whos prepared to go through the problems with you before letting loose on your client base? [/QUOTE]
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