I can assemble the 3d parts on the computer before anything tangible is ever produced
Scans and models can be tweeked to make them fit/work Jason Sent via BlackBerry from T-Mobile -----Original Message----- From: [email protected] Sender: [email protected] Date: Fri, 04 Nov 2011 12:18:16 To: <[email protected]> Reply-To: [email protected] Subject: Re: Re: [TANKS] 3-D printing Wow there is a lot of talent out there, I never realized all the hidden skills you guys have. So with that in mind I have a few rookie questions in regards to our 3d printing process in development of parts and what is possible. :) Ok, so the two methods being discussed now are building the parts yourself in 3d and having them printed v. taking a small scale model, having the parts scanned in 3d and bringing in to our own software, enlarging it and having a master printed in 3d. Then Fanks molding process into a final usable piece. What I'm wondering is how to test the accuracy of the model you make to determine if its ready to be printed? A static part like a tank jack providing its scaled correctly is not a worry. But when you model a couple tracks to fit on a certain sprocket, wheel, idler, how can it be determined that it actually fits properly and works before you spend the bucks to have it printed only to find out you goofed up on your model? Are models from the box to be trusted also to spend the money to have them scanned and printed? If for instance a tank track is printed in 3d and doesn't quite fit the teeth on the sprocket, can it be manhandled and corrected manually to make it work or would the printing process have to be repeated? Sorry for all the questions, I'm really interested in figuring out this process. Kind regards, John On 11/04/11, [email protected] wrote: I do 3-d modeling at work using solidworks , have the software at home as well ---------------- From: [email protected] To: [email protected] Sent: Friday, November 4, 2011 8:29:44 AM Subject: Re: Re: [TANKS] 3-D printing Hi Charlie, thank you for your reply. Yes that's exactly the process I was thinking about. I would love to get 1 sprocket, 1 of each type wheel, 1 idler, 1 track link and perhaps a couple pieces of the suspension parts scanned if Todd would be interested in doing it. And maybe a couple more pieces that I'm neglecting to think about right now. This is totally uncharted territory for me so I'm not sure how small a part he would need to start with. Plus I will need to bring the small scale model to the shop first and bother Frank and the guys to see if all the parts fit together properly and would actually roll. It would be great if he could scan pieces of a 1/35 scale model and get a good quality scan. Then we can scale it up to 1/6th and have it printed. I consider this a unique and unusual project, it's in preparation for my next tank after finishing the KT, a 1/6 scale Maus. Just figured it would be good to start getting parts together for it over the winter. :) Kind regards, John On 11/03/11, Charlie Mann<[email protected]> wrote: I've got a friend with free access to a 3-D scanner, and he's also pretty good with making 3-D CAD models, then printing them at Shapeways. It sounds like you want to scan an object, then blow it up, basically the opposite of this video: http://www.youtube.com/watch?v=l1Xk91zXsX4Todd is pretty busy, but is always interested in unique and unusual projects. If you've got a few parts to scan, perhaps we can ask Todd if he's got time to work on them. The real expense would be 3-D printing the masters, then the cost of silicone and the resin for the reproductions. Even with using mold release, eventually silicone molds wear out and rip. That's why you preserve the master and make multiple molds.CharlieOn 11/3/11 10:27 AM, [email protected] wrote: In a message dated 11/3/2011 6:49:37 A.M. Eastern Daylight Time, [email protected] writes:What I'm wondering though is would it be cost effective to purchase a 1/35 or 1/16 model and have 1 piece of each running gear and 1 track link 3d scanned, then enlarge it in our own 3d programs and have the masters 3d printed. Then Frank can do his magic with the molding process? John as i don't know how much scans would be so i can't say cost wise how it'll be cost effective in the end as it might just put you out price wise. but since you do your own 3-D stuff, it should bring the prince down. as for casting some of these parts, i was looking to do the tracks and sprockets for the Tiger before i did the current tracks but the consensus was that the track links would end up stretching and the sprocket wheels wouldn't hold up. but if your still willing to try resin tracks and sprockets such as on the real tank, then you'll need to change resins to something stronger such as a task-3 (pretty sure that's what i used, i'll have to look), and pressure cast the parts, and at that point, you'd have to also vacuum the rubber as when you pressure cast, any air bubble left in the rubber will end up give you a pickle effect once those air bubbles in the mold collapse. another thing, for the track links, i'd cast in some small sections of brass tubing to work as bearings between the pin and the link otherwise your pin will start to wear on the resin. but if they were cast in metal.......... and as for my mold not being done right causing it to rip, it was done right, but it wasn't for tracks (i forget what it was, as it happened a while ago). Chris,Odyssey Slipways-- You are currently subscribed to the "R/C Tank Combat" group.To post a message, send email to [email protected] unsubscribe, send email to [email protected] the group at http://groups.google.com/group/rctankcombat-- You are currently subscribed to the "R/C Tank Combat" group.To post a message, send email to [email protected] unsubscribe, send email to [email protected] the group at http://groups.google.com/group/rctankcombat-- You are currently subscribed to the "R/C Tank Combat" group.To post a message, send email to [email protected] unsubscribe, send email to [email protected] the group at http://groups.google.com/group/rctankcombat-- You are currently subscribed to the "R/C Tank Combat" group.To post a message, send email to [email protected] unsubscribe, send email to [email protected] the group at http://groups.google.com/group/rctankcombat -- You are currently subscribed to the "R/C Tank Combat" group. To post a message, send email to [email protected] To unsubscribe, send email to [email protected] Visit the group at http://groups.google.com/group/rctankcombat <http://www.youtube.com/watch?v=l1Xk91zXsX4> -- You are currently subscribed to the "R/C Tank Combat" group. To post a message, send email to [email protected] To unsubscribe, send email to [email protected] Visit the group at http://groups.google.com/group/rctankcombat
