Welcome to the SeeMeCNC Community

Long story short-Cut my teeth on a Printrbot jr.-bought two of them for a "keep one give one to a school" kickstarter last year. Finally cut through the red tape and local High school art dept. is getting it.(Wish it were an Orion Ah well...) I built it this week and was calibrating on a Macbook Pro. Which is what I run mine on. I run my Max on a Windows laptop. So I thought, I'll give that a try. After jumping through a zillion hoops to get the unsigned serial usb driver to install(WTF Microsoft ) I could get the host to connect but no manual control? Went to the internet-found a blurb on pushing the "OK" button in the debug window. Voila! it worked!

My question...Why? Why would pushing that button cause the connection to work? Just curious.

There is not alot of info on that but from what I could gather some versions of Host have a bug in them requiring that push of the OK button.
Are you running the latest version of Host?

Repetier-Host VO.95F
The weird thing is my Max works/connects perfectly? When I change to the Printrbot profile, I have to push that "ok" every time. If I disconnect, then reconnect, it still has to be clicked to work? I'm thinking it may be on the Printrboard side?