This topic contains 65 replies, has 10 voices, and was last updated by 
BHudson 3 months, 1 week ago.
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@microcan just to state obvious - to be overly pedantic: all you mentioned is thing for the slicer to handle, not printing software (AM). Is it possible that 3DBenchy was made not only to test printers ability to do hard features but slicers to handle them in such way that printers could do them. If you see printer printing in the air - it is not printers failure/feature - but something that got in gcode and asked printer to do so.
So, feature request is really in Cura land and maybe Slic3r’s, too.
BTW question for everyone else - where’s Cura + AM + Robox failing in printing 3DBenchy anyway? In that link there are quite a few really nicely looking 3DBencies in two colour… What’s different/wrong here? I know DM on Robox is a thing which is in the progress - but it would be nice to understand where/why it is failing at this stage…
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This reply was modified 7 months, 1 week ago by
click.
@click Yes, but if I prefer to get visual feedback before I hit the print button.
The 3DBenchy designers print doesn’t look that good in my opinion. It is not better than the model I printed, without tweaking any print parameter. Every model I looked at has the same overhang problems because it is by design! The front window has a 10 mm horizontal overhang, don’t expect this to be horizontal after this model is 3D printed with a filament printer without support. The model is bad for printing without support, not the slicer, not the printer. You could print it if you use the DM head with autosupport.
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This reply was modified 7 months, 1 week ago by
Microcan.
@microcan Ah, but that’s it exactly the point of benchy! It might not have been designed with ‘perfect object at the end’ in mind but as a test tool. Similar to:
http://www.thingiverse.com/thing:533472
Also, Robox is quite good regarding overhangs - there were a few tweaks over time and result is supposed to be quite fine. I would expect it to exaggerate problems (in slicer engine + printer + filament combinations).
Hi, sorry for taking so long to come back but I had a lot of work.
@microcan I have to disagree with your thoughts on the 3dbenchy. The model is very well within the capabilities of a high quality FDM machine. Here are some photos of a print of it done on my Robox, as you can see any substantial overhang problems can be seen as the Robox is indeed quite capable of handling it.
Continuing with the experimentation, I printed the model again switching materials and lowering the speed by 25% but the results were of inferior quality than the first DM try, as you can see in the pics attached.
Next I will try to lower temp. but first I will fine tune the nozzle separation calibration as it seems this is crucial for proper adhesion of the 2 materials with details this small.
Hopefully I’ll have better results to post next time!
Is it possible that the problem is in material? What’s the difference between materials in your first and second post? (aside of obvious - colour)
@click Not much of a difference that I could see. The white ABS is from CEL and the black is a brand I source locally, they’re both of good quality and I’ve had great results in the past with both filaments.
I haven’t been able to work on the profiles and improve the 3dbenchy print because I’m currently unable to load custom profiles for some reason. I’ll try reinstalling the app or file a ticket if the problem persists.
Still, yesterday I printed some prototypes for an apple watch dock I’m working on and I printed the support and raft in black, the results were very nice and the color separation helped when removing the support material. So, as @pete mentioned, for this type of application the machine works great. I’m really looking forward to get some HIPS or PolySupport filament to really take advantage of the dual extrusion for printing easy removable support structures.
I’ll try to do some tests on using ABS with FilaFlex to have integrated seals in the part later today. I’ll let you know how it goes.
Sorry I wasn’t clear - I was thinking between orange/yellow filament in previous post vs black/white in second.
@click Yeah, I get what you say. An you made me think that maybe using PLA would yield different, hopefully better, results. I’ll try that as well. I’ll let you know.
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This reply was modified 7 months ago by
Luis Bustamante.
@luis-bustamante Let me know how you get on with FilaFlex. I tried it the other day and couldn’t even get it to the head. Any hints?
I operate two Betas and one Production Robox.
See my 3D Hub site at https://www.3dhubs.com/phoenix/hubs/benTake a close look at the inner top of the windows with a microscope or loop. Now take a look at the bottom of the windows. The inner bottom of the window shows the quality of your 3D printer. The top side shows the act of gravity, this also affects nearby parts of the model.
I cut of the roof of the model I printed so yo can see gravity at work. Every filament printer on the market will have these problems unless you have a zero gravity.
You do not have to agree with my opinion but this is how I see it. The rest of the model is good but the top is not designed for optimal results without support.
@microcan shouldn’t upper part of the window be there to show how your printer is dealing with bridges? Similarly, bottom of the roof should do the same. But, again, it is not only printer, but slicer as well (and how well two work together).
On your picture you can see really nice bridges achieved at the top of the window frames and horrible choice slicer did for the bottom of the roof.
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This reply was modified 7 months, 1 week ago by
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