I finally got my Mendel working, as it turns out almost all my problems were being caused by bad thermistor calibration. You can see from the screen shot, 250C indicated by the software is actualy around 225C in the real world. On short notice I found the correct look-up table here: RepRap 1mm Thermistor Lookup Table. Brian helped me fix a leaking thermal barrier. My spool is mounted below my machine, so I put together a Bowden cable to feed the extruder to keep it from jaming.
I've been using RepSnapper, and I think I'm starting to like it. It is so easy to calibrate your machine when it only takes 5 seconds to create gcode from and stl. There are a couple issues with it, but overall it is much more convienient to use.
Pros:
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Extremely fast slicing and converting to gcode ( < 5 seconds for most mendel parts)
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Easy to reposition/rotate objects and create RFO prints
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Easy settings and manual machine control
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Nice 3D preview
Cons:
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No bottom/top cap so objects are see-through
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Raft doesn't seem to work Added in new version
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Only 64 bit? It could probably be recompiled to work on 32 bit, but I haven't looked into it A new version has been uploaded to SVN and it works on 32 bit and 64 bit
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No reversing of extruder? Added in new version
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No early-start, the start of layers if you have multiple objects tends to gap
I haven't figured out if there are settings I'm missing or if these haven't been implemented yet. Anyway, thank you for this software, it is great!
Here are some photos of the Mendel building Nophead's pullys, being driven by RepSnapper.