View Full Version : Robox - High-Res 3D Printer

12-24-2013, 03:36 AM
check out this new Robox 3D Printer,

it prints in 20 microns resolution... http://erikalstad.com/backup/misc.php_files/smile.gif
cheap too, 700



12-24-2013, 03:25 PM
Man that looks REALLY nice. Thanks for the heads up!

12-25-2013, 02:07 AM
We've gotten our 3D Touch down to that layer thickness, so it's not an unobtainable thing but, as a matter of physics, there is only so much lateral spread you can get in proportion to the Z increment value. Therefore, print times skyrocket exponentially. Not only odes it take that many more layers to complete the overall height but other factors come into play. To obtain the same wall thickness, the printer has to complete many, many more loops than it does at thicker layer values. Yes, you can try 1 loop and do a lot of infill but, with a loop extrusion that is roughly 2X the layer thickness, and the layer thickness being so small--and therefor so fragile, the infill coming along later deforms the wall. So, multiple loops are required to maintain integrity. No free lunch.

12-26-2013, 01:33 AM
There is a new thinking that with ABS you should print rougher layers (like .25mm or higher) and then use vapor smoothing. I can tell you vapor smoothing can make even the roughest print look glass smooth but tiny detail or thin parts will disappear. I tried smoothing a rose that had very thin pedals (.35mm thick), they were pointed upward but while smoothing they flopped over and ended up laying flat. Still for anything without fine detail or thin parts vapor bathing makes for very smooth parts without the trouble or time spent trying to print at higher resolution.

You could say vapor bath is like subpatch in Lightwave ;-)

12-26-2013, 09:12 PM
The problem with a vapor approach is that it is ubiquitous. I paint acetone on in varying degrees. More where I want smoothing the most, less where sections are thin or detail is small.