Arrrghhhhh! Err: MAXTEMP

[jenschr 6]

I have waited for a 14 hour print today and I just came home to see "Err: MAXTEMP" on my Ulticontroller. So much wasted filament... :sad:

 

This obviously means that I have now used (and broken) both the cables in yet another signal cable (the one from the Thermocouple). I do use my machine a lot and I also have a spare cable (in my unopened Dual Extrusion kit), but honestly - this weakness must be addressed more permanently?

 

J

 

[nick-foley 5]

I agree, a more robust connector should be used instead of the JST. This is a very obnoxious problem that is also a very easy problem to solve at the time of manufacture. I may just solder mine when my second set of connectors starts to become loose.

 

[gr5 2,167]

Well.... experts (aka other posters) claim that soldering is the entire problem. Those connectors are supposed to be crimp only. But if you solder then the solder wicks up the wire making it stiffer and giving it a smaller area where it can flex.

If you *do* end up soldering, then you should use the strain relief well. I put a blob of hot glue gun to connect my temperature wires to the strain relief. I don't know if that was a good idea or not.

 

[nick-foley 5]

No, the problem for me isn't that the wires have broken at all - it's that the crimp pins have worked themselves loose and no longer make reliable contact. It first presents itself as a noticeable "flicker" in the reported temperature logs, and then amplitude of the spikes gradually increase until min and max temp errors get thrown up.

Though while we're on the subject, I'm sure it wouldn't break the budget for them to use continuous flex-rated conductors here.

 

[seascape 0]

Hello,

I have experieneced the same "Arrrghhhhhhhh!' as you - that 'Max Temp Error' message on the ulticontroller is a rather hidious beast.

I would say that 4 out of every 5 prints were failing, short prints of 1 or 2 hours would be OK but anything over this print time would fail - very annoying when a 10 hour print fails at 9 hours "we were so close but alas it was not meant to be".

I checked all wires and re-plugged them in etc and then it would be OK for a short time but then same maxtemp error message would revist me like Crugger - whats going on here???????

Then I looked at the fan and thought could the fan be fluctuating a temp sensor or similar - so I decided to turn the fan off & try a 14 hour print with a slow to medium print speed (60-100)

14 hours and 12 minutes later a little bit of beauty lay on my ultimakers bed

no fan = no 'max temp error' = no print fail

So prepare your files in Cura (print slow) - Turn off the fan in advanced settings, prepare G-code and save its path to SD card - pop that little SD honey into your Ulticontroller and let the good times roll.

nb: if the fan is esssential to your practice then maybe turn it down from max (255) to medium (150 or so) as this will at least reduce the regularity of this error message appearing. But I have found that no fan has produced better prints with less warpage as they are curing to air temp which is as even as you can get.

Warm Regards from England

 

[gr5 2,167]

Interesting. You might want to consider removing the fan wires such that they are farther away from the temperature wires.

I have gotten maxtemp with fan power off. So for me it wasn't the fan. I can duplicate it by jiggling the temp sensor wires. I found it happens more in the corners of the UM where it stresses the wires the most. Anyway I improved the stress relief and switched to the other cable and we will see what happens.

 

[saulbass1 0]

Afraid that I too suffer from frequent MAXTEMP errors. Mine is a pre-built machine and I waited/lost a month earlier this year trying to get it fixed by support. Since then I get this error every few weeks - randomly but it's a lost night and once again so much lost material...

shame really.

Perhaps when engineering have got the shiny UM2 out they might look at ways to fix this common fault.

 

[gr5 2,167]

Well I recommend replacing the wires and the connector to the temp sensor. Just run a whole new cable from board to print head and leave the existing cable as is. Make sure you do really good strain relief. Either that or accept that you have to replace the cable every 300 hours of printing or something like that.

I used the backup cable in my cable assembly and that gets the error occasionally also but it's much rarer now. I also did better strain relief. But I still get the error. Never in a print so far, it only happens when I'm leveling the print bed and pushing the head to the 4 corners.

Anyone know the part number (or even better the digikey part numbers) for the connector and crimp fit pieces for this connector?

 

[gr5 2,167]

saulbass - did you try the extra cable? There's a spare cable and connectors (meant for a second nozzle). You can just switch over to that second cable and on the bottom of the machine, take off the cover and switch to the second cable there also.

 

[brictone 0]

I'm having problems with this too except my printer is so old I don't have a spare cable or connector. Anyone know the part numbers so I can order some new ones on digikey?