Ultimaker not connecting after firmware update

[kirai 0]

Hi,

I'm very new to all of this so please bear with me. I had some problems with printing (print wouldn't start, while everything up to the point of printing went fine), for which I decided to update my firmware. I upgraded to marlin build 3 and now I can't connect to the ultimaker PCB. More importantly, I can't get the default firmware back in. Does anyone know what to do?

[Daid 306]

This is more of a RepG problem then a Marlin problem really.

Or more of problem with people just changing defaults. The communication baudrate has been changed a few times now. It used to be 57600, but Marlin already moved to 115200. But there are also 230400 versions, and I think the latest uses 250000.

In your ReplicatorG install directory there is a /machines/ folder, in there there is an ultimaker.xml file. Open it in a text editor to change the baudrate (it says "57600" somewhere)

Or give PrintRun a go:

http://reprap.org/wiki/Printrun

which allows you to set the baudrate when connecting. (I noticed I have to press "connect" and then "reset" for it to work)