Nozzle not heating

Support for UP mini. To report a bug, post with a title [BUG REPORT]. To request a feature, post with a title [FEATURE REQUEST]
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gvody
Posts: 3
Joined: Wed Feb 25, 2015 2:54 pm

Nozzle not heating

Post by gvody » Thu Feb 26, 2015 9:36 am

I'vd just bought a new Up Mini.
Firstly, I had no problem to load the filament into the extruder head.

But just after, no more heating seem to became possible above 35 C° ...
The head is just a little bit warm, no more.

And no heating at all for the platform.

What can I do ?

mb20music
Posts: 375
Joined: Thu Feb 14, 2013 1:35 am
Location: USA

Re: Nozzle not heating

Post by mb20music » Thu Feb 26, 2015 10:28 pm

Where did you purchase it? I suggest you contact them and they should either offer a replacement machine or replacement parts.

gvody
Posts: 3
Joined: Wed Feb 25, 2015 2:54 pm

Re: Nozzle not heating

Post by gvody » Tue Mar 03, 2015 12:32 pm

Thank you for your advice.

I received a replacement machine.

Now, the nozzle work fine and heat well.

But there is an other problem with the platform which seems to refuse to heat ...

In the "maintenance" box, the platform show 60,4 C° at the begining and stay indefinitely at this level.

If I touch the platform with my hand, it is warm. But not warm enough, I think.

Do you have an idea what is happening now ?

brainzilla
Posts: 141
Joined: Sat Nov 29, 2014 5:41 pm

Re: Nozzle not heating

Post by brainzilla » Wed Mar 04, 2015 10:50 am

The bed temperature is just "guessed".
The Mini's bed has a heater and an automatic switch that disconnects power to the heater at 60°C and reconnects it at about 57°C (hysteresis, to prevent rapid switching / swing).
So what the printer does is heat the platform for some minutes, then assume its hot and start printing.
Since the temperature is not actively monitored, the 60,3°C is just "show"

Also some people reported that their bed never heated well while others do not have issues with that and reach the tripping-point of the 60°C switch.

What helps is to select "heat platform for 1hr" and close all the doors. It warms the inside and prevents warping in ABS (although 60°C way to low, it should be around 100°C to effectively work on ABS).
Room temperature is also a huge factor and draft as well.

Your choices:
A - You can switch the temp switch to the 100°C model (search forum).
B - Print in PLA, forget shrinkage, welcome extruder-slipping.
C - Preheat well and print only smaller ABS stuff.
D - Check what temperature your bed reaches and if the switch ever trips, if there is power on the bed and find out it has a malfunctioning heater - get this unit replaced as well.

gvody
Posts: 3
Joined: Wed Feb 25, 2015 2:54 pm

Re: Nozzle not heating

Post by gvody » Wed Mar 04, 2015 2:52 pm

Thank you for all these very interesting informations.

The support service just answered me by mail with this explanation :

"The temperature from the software make no sense, because there is no temperature sensor on the platform. Therefor, it is always 60.4.
Actually the platform's temp is about 58 C°, and it is enough for the the model stick on the platform."

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