Oct. 9th, 2011

johnridley: (reprap)
Cut the smooth rod for the X axis down - this smooth rod is incredibly hard, I couldn't even scratch it with a hacksaw. I had to cut it with an abrasive wheel on a Dremel tool, it took 10 minutes each to get through an 8mm rod and I completely wore down a new abrasive wheel doing the two cuts.
The X carriage was not moving smoothly but there's no adjustment so I heated it up with a heat gun to relax the plastic, then ran it back and forth, that helped a lot and it's moving smoothly now.
I cut a piece of 1/4" plywood to make a groovemount for the hotend; it's in the extruder in the picture below. Also I finished the heatcore, it's in a clamp in the lab with the ceramic cement curing.
I printed a mount for the RAMPS electronics and a fan to cool it, those are on the lower right.
I did a bunch of messing around to get the print bed in an acceptable state.
I also designed and am currently printing an XLR power connector holder. If it works out I'll post it to thingiverse, I didn't find a good one up there already which I found very odd. I guess most people don't bother wiring a proper power jack. Or maybe I just missed it.
No wiring today but it's very close. If I'd wanted to push it I probably could have had it ready to go tonight but I would rather keep this build clean and neat.
johnridley: (reprap)
RepRap XLR power connector bracket - turned out quite well.

My MG Prusa is kind of a rat's nest of wires, I really want to make the new one a lot cleaner.

The Chinese LM8UU linear bearings that I got are horrible. Most are actually OK but there are 2 or 3 of them that make a horrible clunking noise every few millimeters, and even with oil and a lot of breaking in (several hundred back and forth passes) they still rattle.

I'm actually thinking about printing some of these LM8UU equivalent PLA printed bushings by Triffid Hunter. He says they work great, better than the original PLA printed bushings and they make it trivial to move to good quality LM8UUs later.

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