Thanks all - some good info there which I am very grateful for.
I downloaded and installed Repetier host. Now Arduino is refusing to upload new firmware to the printer - it compiles fine but fails with a timeout on upload. This is new, previously I had no problem with uploading. Have removed and reinstalled Arduino thinking that would reinstall the driver, but it didn't. I can see the printers properties from the Arduino menu so I know it can communicate.
The only change was installation of Repetier host. I see the printer now shows an IP address on its menu so Repetier host has obviously tinkered with the firmware, though I didn't do more than just run Repetier host.
I downloaded and installed Repetier host. Now Arduino is refusing to upload new firmware to the printer - it compiles fine but fails with a timeout on upload. This is new, previously I had no problem with uploading. Have removed and reinstalled Arduino thinking that would reinstall the driver, but it didn't. I can see the printers properties from the Arduino menu so I know it can communicate.
The only change was installation of Repetier host. I see the printer now shows an IP address on its menu so Repetier host has obviously tinkered with the firmware, though I didn't do more than just run Repetier host.