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Post by Deleted on Oct 12, 2017 12:53:15 GMT -5
Hello everybody ... To all designers of structures on Shapeways : don't spend ( = lose ) Your time designing coloured items ...  The facts : I bought the "Sears" house by Stony Smith, it looked fine, but the edge around the roof had some very sharp, sticking out sections due to printing ; so we filed them away and re-painted them again (with acrylic Tamiya) ; unfortunately the dust was absolutely impossible to remove, even with a (dry) tooth brush ; so we tried the "wet" version with simple water and the same tooth brush. Dust was removed, but most colour too ! This material looks fine but seems to be absolutely not compatible with water. So, dear z-scale friends, design Your models directly in "strong and flexible" or FUD, the end user has to (re ? )paint them all the way  . PS : "Merry Go Round"'s by Sven Pollmann are fine designs, I have three (motorized) of them ... in "white strong and flexible"  . |
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Post by rvn2001 on Oct 12, 2017 13:25:19 GMT -5
You will find that Shapeways says that the "Full Color Sandstone" color will come off with water. I found this out on the telegraph office. I just repainted it. I have Stony's city hall, Victorian house and 2 different Sears houses. They all turned out great. I designed strip mall walls in wsf and clear acrylic because I can only design in 2-D (gray scale). I've found that it's best to look at all the info you can find or be willing to deal with the consequences.
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Post by Deleted on Oct 12, 2017 13:39:53 GMT -5
You are right, it is written in the "Full Color Sandstone" section ; the issue is that I had to remove those sharp edges, and I don't know another way to do it, and then remove the dust !
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Post by dazed on Oct 12, 2017 15:56:18 GMT -5
You seem to be big on doing everything your own Rube-Goldberg-ish way versus simply following the instructions or recommended practices. Particularly with Shapeways you really need to be mindful of the tips that are in front of you. AND, Shapeways is still sort of a pioneering technology...it's not always going to be perfect.
Instead of insisting something is crap after one failure, how about just post your experiences and keep working to improve and make suggestions. Stony is really just trying to push the envelope a little....it's not always gonna be a homerun every time.
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Post by Deleted on Oct 12, 2017 17:52:01 GMT -5
I have the "Pizza" store, too ; and I didn't have to modify anything, because there were no parts to be filed away. But if there are some parts that I need to remove, how should I do without making dust? Shapeways doesn't say anything it THIS direction ! And not knowing if there will be such issues with a model is unfortunately a kind of gambling, it was not a model designed by myself with the "print it anyway" option. These considerations don't target Stony and the other designers, it's rather Shapeways who should improve their printing processes or give solutions. Another example : everybody (including Shapeways) is speaking about a new black "miracle" material made by HP. For myself I designed some walkways with handrails, to be used on an unloading system (simulated) for my hoppers ; I made a test print (not at Shapeways, but at another "printing" company). One halfth of the handrails were deformed when the parts were delivered. So I wrote the problem to the staff and understood that this material was not the right one for my use. Meanwhile I sent the same parts to Shapeways to be printed in "strong and flexible" with black cover, and there were no issues. And a previous test in FUD with the same design (and "print it anyway" option) produced handrails which broke like glass, they were too thin (0.5mm) for FUD, althoug they were printed without issues.
Some materials are better suited for some precise usage, and I must say again that "full color sandstone" has an amount of "experimental" character ... I am still thinking that for structures polyamide is the better choice, or FUD if there are no parts that could break too easily (my log cabin by Stony or the small country church by Walt in FUD are very nice after painting ... )
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Post by BAZman on Oct 12, 2017 23:30:35 GMT -5
Shapeways is NOT perfect and is known for it. The 3D printing has variables and artifacts. It is *NOT* the designer !!!!
Printing varies based on orientation (Shapeways prints the uploaded objects in *any* orientation they desire (to fit *many* other parts in the same print volume. So, sometimes they come out 'good' and sometimes they come out as you received (SEND IT BACK. Read their return policy!)
3D printing uses 2 materials: the 'support' material that makes your parts have a place to start, and basically just water or light solvent washes away and, the material you want. Temperature, humidity, speed, etc. effect it. And, they really don't know what the parts are, that they are printing.
Please, DON'T blame the Designer.
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Post by Deleted on Oct 13, 2017 0:41:32 GMT -5
1) Too late, the item went to the garbage can (it was not the first unsuccessful test). And the sharp edges (the problem's source) were ALREADY filed away ... 2) As I wrote (I hoped, clearly enough, but it seems not to be so : "These considerations don't target ... " ) I DON'T WANNA BLAME THE DESIGNERS, they do things that I couldn't do ; my only idea was that they should not lose their time in designing for a material which produces "random" results ; both polyamide and FUD are better choices (see most structures by Walt and some by Stony). And for myself I will only order structures made with these materials in the future (the precautionary principle : Murphy is still alive !  ). That's all folks ! |
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