Printing parts is not a problem I do have a Da Vinci 1.0A but it really is ABS only so want to build the UM for other materials.
Are the Reptar blocks better than buying the ones in the link?
There is very little info in the ebay item description... Its supposedly for the UM2, its injection molded and contains some copper bushings (I believe, at least the UM1, uses bronze here)...
Thats it... No measurements, diameters of bushings, size of block, description of belt types etc.
By printing some yourself you have more control over these parameters... They aren't very expensive though, so you might want to try them out.. If nothing else, just to harvest the bushings from them (I would do some searching around to find out if copper works as good as broze though... I think the bronze ones are supposed to be self lubricating in a way).
If you end up going with a E3D hotend, E3D also sell bronze bushings:
http://e3d-online.com/Mechanical/Bronze-Bushing-for-8mm-Rod
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aviphysics 9
I believe so. IIRC, the UM2 design makes it difficult to remove the XY carriage without breaking the XY blocks. Also, they are designed to put tension on the belt, which isn't needed for a correctly sized GT2 belt.
The Reptar blocks are the ones I use. They are lightweight and the GT2 version doesn't put tension on the belts. A lot of people like the Chopmeister Twister blocks, which make it possible to remove the XY carriage without disconnecting the XY blocks from the belts. IMO, they are both good choices. They are also a lot cheaper, if you can print them yourself. Printing them in ABS should be fine.
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