[Filamemnt feed at hot-end?]

We are using the latest firmware as installed from Cura 15.02.1.

Filament is Colorfabb PLA used at a temperature of no more than 230c.

[Filamemnt feed at hot-end?]

Thanks for the reply

Yes the thrid fan is working.

We have 8 of the UM2's and they all show the same problem and most have printed over 200 hours.

[Filamemnt feed at hot-end?]

HI All

Almost everytime I start a print on our UM2 the filament does not extrude even after having just printede a model.

I find I have to 'Move Material' remove the Bowden Tube at the nozzle end advance the filament and cut off the end of the filament that comes out looking like this:

Then when I start the print it works ok.

So how can I avoid this process?

Regards

Graeme

[Feeder wheel?]

Hi all

I know this has topic has been discussed concerning grinding of the pla.

My question though is would a solid rubber driver wheel be better suited than the supplied knurled wheel? My thinking is quite simple in that this would avoid grinding and the PLA being delivered by a friction only drive mechanism.

As yet I have not located a suitable wheel to try this out but I would appreciate your expert views.

Another issue I have is the age old one of the first layer being patchy. Your recommendations on this would also be welcome.

Thanks in advance

Graeme