tjeb

FYI, I've been running at 230400 recently, which is one of the 'standard' speeds that PySerial on linux can handle, at least on my systems. So if you're afraid of underruns at 115200, you could switch to that. But I had been running at 115200 before that and have not seen any speed-related issues myself.

Wow, 2 on your Y's? Did you put one on each side? I didn't have enough tension in my X's and added a small piece of wood between the tensioner and the belt. But I'd like to know how you did it, it sounds like a much cleaner solution. Yeah, one on each side; it requires that you do completely pull out the 3 screws, and fitting the nuts back on is tricky since the screws are just barely long enough to make it (and they only go half way into the nuts now). Next time i'm at the shop I'm gonna see if I can find slightly longer screws, but for now it seems to hang on just fine. In effect this does the same as thing:17058 I guess, with the slight advantage of being adjustable while mounted and being held by the screws (but, again, I have not tried 17058, i found these earlier and they did the trick for me). The disadvantage of course is that you'll lose your tension if the screws get loose, so for important prints you might want to check and tighten them

For other people having the same problems; loose belts still allow you to print, but at a lesser quality (print a small circle and keep it to compare with when you do have your tension right ). Adding them later is not really hard. I tried http://www.thingiverse.com/thing:19818 and they work great; I needed 1 on each of my X-axes, and 2 on my Y's (...). Fitting two with the normal screws is a tight match, so I'm thinking of getting longer ones, but it does work with the standard screws.