Update (20121127) NEMA 17 brackets came in! And even more surprisingly: we like them!! I just put them back online again. It is possible to order the brackets again. Finally!
Now we are waiting for the brackets of our second manufacturer.
Here is a picture of what the bracket looks like (the right amount of holes and a polished look).
Currently there are two manufacturers working on NEMA 17 brackets for two beams. Here is a link to an earlier blog post (20121026) about this.
The information we get on the first company is not that good. They made the choice to make them with sheet metal instead of aluminum (AlMg1). This to make them stronger they say. Now the brackets are ready, but there is the question whether or not we want to have them polished, see picture. The answer is yes we want them polished! This will take a few more days. Probably they still will be in by the end of November. This is when we expect a new batch of black anodised beams in, so good enough for us. We have been waiting this long, we can wait a little longer.
We are very optimistic about the second company. Pictures of the finished product we have not received yet. However we did receive good drawings and good feedback. The company even pointed out to us a flaw in the info we gave. That is why we are optimistic and are hoping we can get our servo brackets made there as well. We are working on this. Here are some drawings of the NEMA 17 brackets and the servo brackets.