Wednesday, August 28, 2013

Printer calibration

These calibration instructions are copied verbatim from Tim Rastall on G+. They're specifically about KISSlicer but they should work for other slicers as well.  I have not tried this yet.  He also mentions that Thingiverse object 8757 is a good calibration object.

I've been playing with a few different slicer programs lately. Each has pros and cons. I will try to get some info posted about them at some point.

Firstly, make sure you’ve set KISS to show advanced settings.
Have you done any simple calibration objects? I found the flow tweeks that I had for Kiss were different from Slic3r.  So, at the risk of telling you how to suck eggs:
Set your extrusion width for perimeters and infill to your nozzle diameter. Make sure you’ve got it doing perimeters first then insides (better accuracy).
Slice a 20mm calibration cube with 100% infill.
Send it to your printer and let it do 25% of the total layers for the completed object.
Pause the print and examine the infill. If the edges of the infill paths are touching, dial down you flow rate on your printer by 20% and re-commence the print job. Let it do a couple more layers then pause again, there should now  be a noticeable gap between infill paths, push the flowrate up by 3-5%, rinse repeat until the paths just touch then add a couple of extra % to allow for variations in filament diameter.
Once you’ve done that and confirmed the cube is dimensionally correct. You ‘should’ be laughing.
If you are still having problems gettin parts to fit, there is an inset surface feature that allow you to pull the perimeters inwards a bit (no more than half extrusion width).

Saturday, August 10, 2013

Bike reconfigure

P1010394 by j_ridley2000
P1010394, a photo by j_ridley2000 on Flickr.
The handlebar bag really gets in the way of lighting and other stuff, so I moved it to the back. The taillight looks blocked but it's perfectly visible from any angle that matters behind the bike. Now I can put the headlight up top where it's not blocking the brifter or the drops. I also switched to a smaller and lighter light.

I also moved the rear-facing camera up to the helmet. I was worried that it would be too much weight on one side, but the RD32II is VERY light and even two of them isn't that noticeable.

Thursday, August 1, 2013

Big Red Button!

P1010339 by j_ridley2000
P1010339, a photo by j_ridley2000 on Flickr.

I picked these big red buttons out of the trash when they were cleaning up the storage area at the Robotics club, and I just had to put it on a printer. Just because, you know.