Now the @Printrbot simple metal printers are ready to be used in school!
@Thomas_Sanladerer published his video guides just then, when we planed to get started with the assembly. So that made it easier for the two students with Swiss German mother tongue.
The students did a very good job. But after 3 hours the time ran out and the assembly was not yet finished. So I finished the printers the day after, which took additional 2 hours.
More about the process on my blog (in German):
Lucky we only have cubes.
@Griffin_Paquette By now I’m very happy with the support from @Printrbot (even @Brook_Drumm took care of the troubleshooting).
@enhydra I speak from personal experience @Brook_Drumm is the best to work with and to contact. He is super super helpful.
I tried to post on the site but it got swallowed up. How about installing a Raspi with OctoPi instead of an LCD Controller.
This would make a good project for a pupil but also mean that the print jobs can be followed throughout the school if you have a network.
It would be interesting to see if a B+ could drive more than one printer at a time… @foosel ?
@Lucas_Fowler Hm, there is a network but I’m not allowed to connect my devices to it. 
Beg Forgiveness or ask permission? 
@Mike_Miller OctoPrint uses 5-15% CPU and 6,5M of RAM for me, so running more than one on a single PI wouldn’t be a problem resource-wise. Just need a couple of USB hubs…
The B+ has four USB ports. 
I wonder if it were to get disk I/O bound if if it were driving more than one.
Yes, but you’ll still need a WiFi stick, webcams, …
But disk I/O is probably not going to be much of an issue. I get about 0.5MB/s (rough ballpark) when uploading files, and since memory tends to be faster on reads than writes, you’d have to print many really detailed files at the same time before it chokes. But OTOH, the serial connection to the printer is on a much tighter bandwidth budget anyways.
By the way, yay for thread hijacking!
