Author: 3dprinterbank

All holes in my parts become 0,5mm smaller than designed. Why?

I have printed a calibration cube before, which was exactly 20x20mm, with some negligible margin like 0,04 or 0,08. I just checked my latest printed part and the width is nearly perfect. It’s designed to be 35mm wide, and it measures exactly 35,00 (with +/- 0,05 error, depending how I hold the micrometer I guess).But this latest part has holes, e.g. 4mm diameter, and they turn out to be much smaller. E.g. 4mm becomes 3,5mm, 16mm becomes 15,5 and 7,3mm becomes 6,8mm. So when I design parts, I always seem to have to add up 0,5mm and maybe another 0,1 so the screws go in easily. It seems to be the same size of my nozzle, which is also 0,5mm, but I have doubts it has something to do with it. Even 3mm holes become 2,5mm!This happens whether I use Cura or Slic3r, and I don’t know how I can fix this. It must be somewhere in the slicer settings, or the printer settings. But where? Adding 0,5mm to any circle inside the part is a solution (with 0,1 or 0,2 extra for some space so the screws get easier through), but this week I downloaded a bowden carriage part and it had the same error of 0,5mm. Which makes me believe it’s in the settings.EDIT/UPDATE: So it seems that the wall goes over the outline of the hole, and since my nozzle is 0,5mm, 0,25mm end up outside the hole and 0,25mm inside the hole, making up for the 0,5mm smaller holes. A simple algorythm that’s been created by Bowyer would have solved the issue, then users started to complain about too big holes and it got removed from Slic3r again. So far for the development in 3d printing… http://ift.tt/2azjRDl

Tiny Review and First Print off of my New SeeMeCNC Rostock MAX V2 I Picked Up on Discount at the Detroit Maker Faire this Past Weekend

The beast:http://ift.tt/2aVmM8j only calibrating I’ve done so far is the z-axis height. After running the calibration macro in MatterControl for checking all three towers, I was astonished to discover that calibration was dead nuts on without doing anything further. Printed with default settings in MatterControl for “Fine” quality (100 micron), this is what I got using Inland ABS from Microcenter:http://ift.tt/2aTpKNT crap. Again, stock settings for everything, and only half of the calibration process. I’ve got some overhang issues, but overall, this is one hell of a print for being the absolute first thing that came out of a printer that I built with my bare hands. Even though I’ve built my fair share of printers (RepRap and MendelMax), SeeMeCNC should get all the credit for such a fine piece of machinery. The build process was super quick (they estimate 20 hours and I did it in roughly 8 while taking my time) and the instruction manuals are incredibly detailed with a few jokes thrown in here and there.Go buy one! Check to see if SeeMeCNC is an exhibitor at your local Maker Faire and grab one during the event. This past weekend, they had the price at $900 and you obviously don’t need to pay for shipping. Make sure your car is nearby though, because the box is ridiculously heavy (about 40 pounds). http://ift.tt/2aTnLsT