http://reprap.nomatic.org/ nomatic.org robert (mailto:au@unterluggauer.org) 2008-03-11T09:44:50Z en hourly 1 2000-01-01T00:00:00Z http://reprap.nomatic.org/stories/1180332/ after some months of little time to work on my reprap (because of changing my job, changing my laptop, searching a working usb-adapter) and a lot of broken parts, I've made some progress :) I am able to print the first part to calibrate the parameters: nomatic.org andi Copyright © 2008 andi 2008-02-24T20:25:28Z http://reprap.nomatic.org/stories/1180198/ instead of resting flat on the bed, it is curling up in the air nomatic.org andi Copyright © 2007 andi 2007-10-19T19:22:41Z http://reprap.nomatic.org/stories/1180157/ last year I needed to make some prototypes to test a product-idea. commercial offers for one prototype only (4 parts) would have cost me 400,- euro. during design-studies I would have needed some of them, but the costs were simply too high for testing not more than an idea by then. it was in january when i read in my favorite linux magazine a comment about the 3D-printer reprap. i was interested and i knew instantly that i have to go for it. yet, i didn't start immediately, but organized my india-holiday. first things first. in february i bought a used lathe, not exactly knowing for what i will need it (well, now i know :) ) and finally in may i found the time to start the project and began with my first handmade circuit boards ... nomatic.org andi Copyright © 2007 andi 2007-09-03T19:47:41Z http://reprap.nomatic.org/stories/1180163/ in mid august I got most of the parts printed from a friend on an commercial 3D-printer ... two weeks later I nearly finished my first darwin. but still some problems need to be solved before I am able to print. first of all I couldn't find capa in austria for the toothed wheels. the small ones I could make with the lathe, but the bigger ones have 62 teeth, which goes beyond the possibilities of the lathe, which can only handle 60 ... one way out was to order "friendly plastic" from germany (www.quiltzauberei.de). In the online-shop they tell you its colored, but what you get is almost black. only one side of the surface is colored. anyhow, after melting it the color appears to be mixed with black. well, the question of esthetics beside, the wheels seem to be good. The second problem is the firmware. I have been getting strange messages during heating up the extruder, so I try to improve the firmware as a next step. the sync of the steppermotors also causes problems. nomatic.org andi Copyright © 2007 andi 2007-09-18T21:58:30Z http://reprap.nomatic.org/stories/1180169/ The good news: after some days of rewriting, debugging and struggeling with sdcc-bugs, the communication-part of the firmware appears to work very stable and doesn't create strange packets any longer. but it was a bloody deed. I had to go through assembler-code to find out if the compiler switches memory-banks right (sometimes he doesn't, which can lead to "nice" results: e.g. debugging output of variables prints the wrong variable, ...). i also had to learn that interrupts could overwrite my local variables ... yet, this part is working now. also the motors are syncing fine, thanks to dan's hints and after some reading and measuring and changing the firmware to get infos, I found out that one of my board had a wrong connection: two-lines were placed to close. also the jumper for the max-sensors were set wrongly and the plug of the connecting-wire for the sync had a slack joint. not enough I destroyed my extruder again :( I had to open it for cleaning and by doing so I broke the nichromwire. %&$. as i can't find that wire in austria, I have to order a new one ... oh well. nomatic.org andi Copyright © 2007 andi 2007-09-24T20:09:21Z http://reprap.nomatic.org/stories/1180162/ in mid of july I had my first extruder working. nomatic.org andi Copyright © 2007 andi 2007-09-18T21:11:18Z Search this site: q http://reprap.nomatic.org/search