Video : Bed rising too far at start of print, striking print head

[donald-lindsay 0]

I've been using Ultimaker about five years, Ultimaker 2 since 2014. The printers have given me a fairly easy ride I think though, as despite heavy use I only found the need to replace a part very recently. The failed part was the main board, and having installed the new main board from Ultimaker today, I powered up, and noticed a strange behaviour during bed levelling. Levelled the bed anyway, and attempted a first print with the new board. The video shows what happened :

 

https://www.youtube.com/watch?v=AU1R2G7aKgY

 

The issue shown here is more or less the same as happened during the initial bed levelling. It happens each time the machine tries to start a print. After the collision, the bed lowers as shown, and proceeds to print some distance above the print bed. Re-levelling the bed makes no difference, as the gap reappears following the collision at the start of any print.

 

It's probably something obvious? I hope so!

Edited April 14, 2018 by donald-lindsay

[tinkergnome 760]

It looks like you have installed a firmware for the UM2 extended.

As a first step i would double check the firmware version and/or re-install the correct one for your printer.

 

[donald-lindsay 0]

Brilliant thanks tinkergnome. It must have been that, a firmware update fixed the problem.