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Thursday, March 25, 2010
Sunday, March 14, 2010
Saturday, March 13, 2010
Wednesday, March 10, 2010
Friday, March 5, 2010
Splitting the belt
Molded Parts
Before I *lucked* into some Mendel printed parts, I was trying to think outside the box and decided to play with mold/casting some. There are 6 Frame Vertex parts that take about 2 hours each to print. I happened to have one as a sample that johnnyr gave me.
I was actually surprised with the results. I'd never tried this before and definitely learned a few things. I plugged 2 of the holes with clay before making the mold so that I could remove the part from the mold after the silicone rubber set. I pushed the clay in far enough so that it would make an impression (which would help with the drilling after the cast was finished). One of these has been drilled out - the other hasn't yet.
I was actually surprised with the results. I'd never tried this before and definitely learned a few things. I plugged 2 of the holes with clay before making the mold so that I could remove the part from the mold after the silicone rubber set. I pushed the clay in far enough so that it would make an impression (which would help with the drilling after the cast was finished). One of these has been drilled out - the other hasn't yet.
Tuesday, March 2, 2010
A RepWhat????
I've taken a lot of pictures along the way and plan to publish them in order so that others can learn from my errors. Here's where it currently stands:
Some close ups of the pulleys I bought from McMaster-Carr. I already had the motors - 5mm shaft w/ a single flat side. Bought 3/16" pulleys (they didn't have metric) thinking that it was close enough...had to "bore the bore" some more and shave/grind the flanges on them to get them to fit:
To bore them, I cut a hole in a scrap and held with pliers to keep from spinning. Had to buy a 13/64" bit, but it cut nicely. Then put on the drill and shaved the plastic flanges with a chisel. One of the pulleys is steel - used a grinder on that one.
more to come...
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