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Mintemp in the Morning  

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Extra Fox
(@extra-fox)
Eminent Member
Mintemp in the Morning

Let me start by saying here that I don't think there's an actual problem here, but perhaps an suggestion for improvement?

In the morning, or after a long period of shutdown/being idle, my printer gives a hot end Mintemp warning. Now I don't believe that this is anything other than a signal indicating the printer is currently cold. The problem is that it becomes a race to get the preheat going before the printer errors out again. Once that's done there are no further issues.

The printer is situated in the room, on a desk, in front of the window. So it's certainly going to be the cooler part of the room in the winter. I could move it, but I really don't have another good place for it to be sat for the moment.

So what I guess I'd like is either the ability to activate a preheat cycle while the warning is active before restarting, or have the printer recognize that it's been idle for a while so of course it's chilly and maybe it can wait a little more time before popping the error. The latter seems like the safer approach, but there are probably other ideas.

Ultimately, I plan to get the printer into an enclosure which will likely mitigate this issue entirely.

Aaron...
Posted : 29/01/2021 8:49 pm
karl-herbert
(@karl-herbert)
Illustrious Member
RE: Mintemp in the Morning
Posted by: @extra-fox

Let me start by saying here that I don't think there's an actual problem here, but perhaps an suggestion for improvement?

In the morning, or after a long period of shutdown/being idle, my printer gives a hot end Mintemp warning. Now I don't believe that this is anything other than a signal indicating the printer is currently cold. The problem is that it becomes a race to get the preheat going before the printer errors out again. Once that's done there are no further issues.

The printer is situated in the room, on a desk, in front of the window. So it's certainly going to be the cooler part of the room in the winter. I could move it, but I really don't have another good place for it to be sat for the moment.

So what I guess I'd like is either the ability to activate a preheat cycle while the warning is active before restarting, or have the printer recognize that it's been idle for a while so of course it's chilly and maybe it can wait a little more time before popping the error. The latter seems like the safer approach, but there are probably other ideas.

Ultimately, I plan to get the printer into an enclosure which will likely mitigate this issue entirely.

The minimum ambient temperatures have already been lowered to 10 degrees C. in the latest firmware. As long as you don't have an enclosure for the printer, I would try to warm up the printer with an external heat source and make sure that there is no draft.

FW 3.9.3:

// Mintemps
#define HEATER_0_MINTEMP 10
#define HEATER_1_MINTEMP 5
#define HEATER_2_MINTEMP 5
#define HEATER_MINTEMP_DELAY 15000 // [ms] ! if changed, check maximal allowed value @ ShortTimer
#if HEATER_MINTEMP_DELAY>USHRT_MAX
#error "Check maximal allowed value @ ShortTimer (see HEATER_MINTEMP_DELAY definition)"
#endif
#define BED_MINTEMP 10
#define BED_MINTEMP_DELAY 50000 // [ms] ! if changed, check maximal allowed value @ ShortTimer
#if BED_MINTEMP_DELAY>USHRT_MAX
#error "Check maximal allowed value @ ShortTimer (see BED_MINTEMP_DELAY definition)"
#endif
#define SUPERPINDA_SUPPORT
#define PINDA_MINTEMP 10
//#define PINDA_TEMP_COMP //Used to enable SuperPINDA toggle menu/function

#define AMBIENT_MINTEMP -30

 
Statt zu klagen, dass wir nicht alles haben, was wir wollen, sollten wir lieber dankbar sein, dass wir nicht alles bekommen, was wir verdienen....
Posted : 30/01/2021 12:03 am
Extra Fox
(@extra-fox)
Eminent Member
Topic starter answered:
RE: Mintemp in the Morning

@karl-herbert

I see, that's quite helpful seeing how it determines the wait time.

I guess, if I really, really wanted to I could go and modify those values and roll my own firmware. Since I'm only at the "I would like to" stage, that probably won't be something I'll risk. Knowing me I'd add too many zeros.

Anyway, it's probably better to have the enclosure built up so then the room temperature differential won't be such a big deal. In the warmer times of the year this is never a problem.

Aaron...
Posted : 30/01/2021 12:16 am
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