a blog: some things happened, a few were documented.
-
A Box of Bits and Bobs
A box of bits and bobs that will be a 3d Printer My recent iteration of a Prusa Mendel that made the ‘box of bobs’ Well almost a year since my last post… better late than… well whatever. I’ve been working slowly, ploddingly, but unfortunately not documenting much because work has been so sporadic on…
-
Extruder drive-screw
It seems there is only one way to mount the dremeled transport screw. That is with the nut in the gear. The gear it self imparts a slight twist to the filament, if the head of the screw is in the gear it’s counter-clockwise. If the nut is in the large gear it is clockwise.…
-
Transport screw testing
This transport screw has been working well, much better than the other hobbed bolts I had made. This way of making the drive screw is a lot more consistent and quicker to make. I’m making a cut area of about 22mm, this way the bolt can be put in either direction, with the head in…
-
Transport Screw on drill press
http://www.thingiverse.com/thing:9291I remade Elk’s Transport Screw
-
July Fixes
So I started thinking about the endstop problem I was having while using the teacup firmware. I had wired my endstops to be normally open, when everyone else… on the planet… wired theirs to be normally closed. a G28 would send whatever axis away from the minimum (the second part of homing), and when I…
-
July 2011 Updates
I found that the firmware I had been using would require too much work going forward and I started a switch to using the Teacup Firmware. Here’s a diff of the changes I made. I mostly made some small changes to my hardware to match closer to the firmware standard. It seems to work…
-
Back to Work.
Printing parts for a geodesic dome
-
April 21, 2011
I replaced one of the broken TIP120s on the pwm heater boad with a MOSFET, testing with a multimeter looked like it was working properly, so I connected it to the heated on my extruder. Testing that proved, or created, a short in the nichrome heater somewhere. Instantly smoked and fizzled. So I killed it…
-
rethinking…
I’m rethinking some things I thought were obvious decisions previously. Well decisions is probably not quite accurate, since I didn’t really think it through, which why I am now. I’ve been making SAE parts… because I live in the US, one of the last foolish countries using imperial measurements. I’ve thought for years that continuing…
-
April 18, 2011
I’m posting this set of PLA Prusa Mendel parts to Ebay in a moment… (here it is) it’s been a long to trip to finishing this set. There was a power brown-out here about 2 weeks ago, I’ve never found a need to buy a UPS until then. I was in the middle of a…
Got any book recommendations?