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It works. Thank you.

There is a "Pause at height" pluggin in Cura. Is it possible to pause at height and then change filament, and then resume printing? Thanks.

Thanks

Does bronzeFill conduct electricity like real metal?

Anybody has any experience on printing flexible filament (rubber like) on an UM1 or UM2? Thanks.

I am trying to print a model with a small part which is difficult to adhere to the platform (such as the Torture Test). I don’t want to turn on “brim” in Cura because the other part of the model does not need brim to print. Is it a simple way to add brim or support disc or whatever to a part of a model so that it can adhere to the platform better? Thanks for any input. Torture test: http://www.thingiverse.com/thing:33902

Are both fans controlled independently? or both fans are actually connected to one PWM driver?

Thanks guys. I shall try.

Thank you. I shall check the control board.

I am going to inspect the control board for a possible thermcouple problem. Are there any instructions to open the protection case? It seems UM2 is not as serviceable as UM1. Thanks.

After upgraded to the latest firmware version (14.07.0), UM2 occasionally displayed the captioned error message. Not sure if it is related to the new firmware or it is a hardware issue. Cold starting the machine again and usually it can work again. But sometimes it refused to print, and the print head's temperature is lower than normal (PLA not melted) even if the front panel displayed 210C or so. It seems the temperature reading is wrong. Anyone has similar experience? Thanks.

Thanks for the clear explanation.

Anybody knows how much power is consumed when the heatbed is on? Thanks.

Do you mean they are developing a new teflon part to replace the original one? Thanks.

Thanks for the reply. I suspect that the PLA filament does expand in the isolation teflon part and causes the under-extrusion problem. I do not have any proof yet though. The performance of the cooling fan, I suspect, will degrade when the printer becomes older. It will complicate the situation.

It seems the small cooling fan is not strong enough to cool down the steel/aluminum assembly. Did anybody ever try to mount a 2nd cooling fan? Thanks. Note: I am talking about the small cooling fan, not the two bigger ones.

I have cleaned the nozzle path and the extruder is still weak. So I doubt this ABS theory.

In the mean time, can we set the material to ABS (raise the nozzle temp to 260C) and use the move material command to push lot of material through the nozzle to clean the path? Thanks.

Thanks. It explains the situation. The printer worked much smoother when it was brand new. After printing 1Kg filament, the problem occurred. I shall ask my friend contact the support.

I am helping a friend to troubleshoot his UM2. It seems that the problem is caused by the weak extruder. I own a UM1 and the extruder of UM1 is much stronger. One example: when a new print job is started, very often we need to push the filament into the extruder in order to let the plastic come out from the nozzle. This never happens in UM1. We tried tighten the spring of the extruder, disassembled the extruder and cleaned the internals. It still does not work. I wonder anything I can do or adjust to make the extruder a bit stronger. Thanks.

I see. I assume that turning the screw clockwise will increase the spring pressure, right? Thanks.

What is the function of the top screw of the extruder? Are the two white dip switches (one on top right of the front, one on right side) used for adjusting the spring? Thanks.

The extruder of UM1 is easy to maintain because it is easy to disassemble it and clean the internal. Also, there is a screw to adjust the pressure on the filament. The design of UM2 extruder looks very different. Is it still easy to disassemble to clean it or adjust it? Thanks.

Thank you for the info. Will read them carefully.

I usually print in 0.2mm or 0.1mm layer thickness.