The QU-BD Revolution XL 3D Printer 
It's a long story, but somehow we ended up with 3 3D printers on our dining room table. The "Type A Machines" printer has always worked very well, so Cosmo and I use that one. The XL is promising but never quite worked right. Sitting next to one that worked very well, the XL never got any attention.
The Makers wanting a 3D printer, I told them the XL could be relocated to SIL, but only if they fix it. Great! It took Peter, Mini, and Chris some effort (a few hours over a few days), and I am happy to report that the XL now works!
They even modified the XL hardware. Peter chose to replace a certain part (a component of the Z-axis end stop switch) with a completely different design, which Cosmo printed on the Type A Machines printer. (Why does anybody need more than one 3D printer? Ahh!) After a few more hours of adjustments, the XL works!
More still to do. Rod brackets (shown at right) need to be mounted on the wall to hold a dowel that holds spools of filament. In 3D printer parlance, it's called a "Top Hat". As well, we will need to install a vent hood, so that we can print in ABS plastic without smoking everybody out. Short of better ventilation, we have switched to printing PLA plastic, which does not smell so bad. (ABS is made from petroleum, while PLA is derived from corn starch.)
If you want to use the 3D printer, make arrangements with one of the Maker Club members for a training session.
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