Anyone else getting the vibe that regardless of the communities concerns 3D hubs went into this conversation with the mindset they were going to do it, and rather than maybe delaying the launch to address these issues and concerns they just ignored them and launched anyway?
Unfortunately yes. The managerial speak trying to make it sound like it will benefit me as a hub and big warning across the top of my dashboard saying it’s happening tells you all you need to know.
It’s getting towards the point where I’m considering if I want to be associated with 3Dhubs as the requirements are starting to pile up for the little cash you get back from the job.
Well, as far as dimensions are concerned, any decent slicing program will report the printing dimensions of the sliced model, so there’s no need to guess. In terms of getting the prints right (accurate to those dimensions) why shouldn’t they be? I know all my prints come out well within the tolerances suggested by 3DHubs so I don’t see the concern. I always check with a customer what the purpose of their print is anyway, and if I now have to remember to also specifically ask about tolerances, that’s really no big deal - heck, we could all easily put together a stock “first question” to cut and paste for any print order that covers things like this.
To be honest, I’m not seeing a problem here. If I were a customer, not a Hub, I’d expect there to be controls like this and I’d expect the printer to deliver me high quality prints that match the model I’ve uploaded. If my model is unprintable, or I want a dimensional accuracy that’s unrealistic, then that’s another matter, but the tolerances being suggested here seem very reasonable and totally what I’d expect from a paid service.
Sorry if this isn’t a popular view, but I can’t see the problem with wanting to produce high quality prints that match the customers’ requirements. Have I missed something here? Do the majority of Hubs often print models with inaccurate dimensions? Does no one else discuss the print with their customer to get an understanding of the job and any specific challenges?
@cobnut The issue with using STL models for dimensioning is that they are dimensionless; what we get in a slicer is just the software’s representation of hundreds or thousands of triangles. Because of this curves become faceted, so if a customer has a small hole and they did not export it properly, they could easily end up with a hexagon instead of a circular hole. It’s just infinitely easier and more accurate to work from a parametric model than an STL file. It’s just poor practice in industry to dimension from STL files. To be clear, I do not have an issue with the set dimensional accuracy range or my ability to meet it. I have an issue with the complete lack of discussion as to how it’s going to be policed (sorry, but a picture won’t cut it) and the space for misinterpretation on the customers side as to what that means. I have already had to deal with customers giving me the wrong file and wanting a refund because it was “printed wrong” but the model was fundamentally wrong to begin with.
My concern isn’t hitting the targets, it’s people manipulating the system in their favour to receive free parts. Stl files Do Not show dimensions. Only overall. This will not show dimensions of inner details and walls. These new standards make it easy for someone to set a pair of calipers improperly and fight for a refund. Meeting the requirements is not at all the issue and I urge you to please read what we have discussed in the past.
As well if you had read my post, I expressed that I felt a large part of 3D hubs is just mutual trust and proper communication. I explained that my practice has always been to discuss with the customer what is needed for the part and if tolerances are needed. So my question is why does 3D hubs have to get involved now? I saw no issue with the system before. Really feels like they are simply creating problems to fix.
