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Alex
 Alex
(@alex-24)
New Member
Scorching Hot Extruder Motor

Checked my extruder motor after a print and it was insanely hot. I checked the other motors and they were cool to the touch. Any ideas? Was printing fine, double checked my build.

Posted : 14/12/2017 6:34 am
Paul Arden
(@paul-arden)
Eminent Member
Re: Scorching Hot Extruder Motor

I searched before posting the same thing but didn't find this post, just found now so can say I see the same thing. Perhaps the mod can remove my thread since it's a dup of this one now. https://shop.prusa3d.com/forum/original-prusa-i3-mk3-f30/extruder-stepper-very-hot-t11947.html .

Posted : 14/12/2017 11:52 am
Mike
 Mike
(@mike-8)
Estimable Member
Re: Scorching Hot Extruder Motor

How much is "verry hot"?

60°C? More?

Posted : 15/12/2017 11:25 am
keith.m10
(@keith-m10)
Eminent Member
Re: Scorching Hot Extruder Motor

Most NEMA17 steppers are rated up to 80 C for allowable operating temps. AKA - blister you if you touch it long enough hot.

Posted : 15/12/2017 8:28 pm
patrik.s4
(@patrik-s4)
Active Member
Re: Scorching Hot Extruder Motor

Mine definately feels hotter than my buildplate at 60 degrees. Havent found time to measure yet. Just unpacked and started printing.

Posted : 15/12/2017 9:34 pm
kelchm
(@kelchm)
Eminent Member
Re: Scorching Hot Extruder Motor

The extruder stepper motor will always be much hotter than the other steppers. I haven't measured it, but I'd estimate mine is sitting around 60ºC at a fairly low print speed. I wouldn't be too worried.

Posted : 16/12/2017 2:15 am
john.n13
(@john-n13)
Estimable Member
Re: Scorching Hot Extruder Motor

The extruder stepper motor will always be much hotter than the other steppers.

Care to explain why?

Posted : 16/12/2017 2:44 am
Paul Arden
(@paul-arden)
Eminent Member
Re: Scorching Hot Extruder Motor

Measured mine today during a print, about 58 degrees, so within operating ranges for mine at least. I will admit I haven't check the temp of it on my MK2S since I enabled linear advance there but will do next time I print.

Posted : 16/12/2017 6:34 am
Mike
 Mike
(@mike-8)
Estimable Member
Re: Scorching Hot Extruder Motor

around 60-70° C is absolutely okay for the extruder stepper motor. No need to worry.
Thanks for the feedback

Posted : 19/12/2017 1:34 pm
leonardo.g3
(@leonardo-g3)
Estimable Member
Re: Scorching Hot Extruder Motor

Printing for 3:19 hours....
Ambient temperature is 21,7ºC...
The extruder motor is sitting at 47.2ºC.

Posted : 19/12/2017 5:13 pm
Chris
(@chris-16)
Reputable Member
Re: Scorching Hot Extruder Motor

I was going to start a new thread, glad i searched first. The other steppers, xyz are cool to the touch, all less than 80 F.
the E stepper is at least 125 degrees.

Posted : 24/12/2017 12:57 am
mmmmmmmmmmmmm
(@mmmmmmmmmmmmm)
Trusted Member
Re: Scorching Hot Extruder Motor

125F is like 51C...or there about.

Posted : 24/12/2017 1:46 am
JLTX
 JLTX
(@jltx)
Reputable Member
Re: Scorching Hot Extruder Motor

I added a heatsink I had lying around. It gets warm.

Posted : 24/12/2017 2:20 am
mmmmmmmmmmmmm
(@mmmmmmmmmmmmm)
Trusted Member
Re: Scorching Hot Extruder Motor

[quote=jltx post_id=56149 time=1514078421 user_id=17771]
I added a heatsink I had lying around. It gets warm.
[/quote]

Those extra zip ties are handy...think I'll do likewise.

Posted : 24/12/2017 2:27 am
kaina.c
(@kaina-c)
Active Member
Re: Scorching Hot Extruder Motor

I'm running my MK2S and new MK3 (Merry Christmas to me!) right next to each other and have been printing for an hour now:

Ambient - 23C
MK2S Extruder - 32C
MK3 Extruder - 51C

MK2-S: v3.0.11
MK3: v3.1.1

Definitely a marked difference but, if within specs and mods are happy, then I'm okay running it warmer than the MK2S.

Posted : 25/12/2017 9:40 pm
JLTX
 JLTX
(@jltx)
Reputable Member
Re: Scorching Hot Extruder Motor


I'm running my MK2S and new MK3 (Merry Christmas to me!) right next to each other and have been printing for an hour now:

Ambient - 23C
MK2S Extruder - 32C
MK3 Extruder - 51C

MK2-S: v3.0.11
MK3: v3.1.1

Definitely a marked difference but, if within specs and mods are happy, then I'm okay running it warmer than the MK2S.

Note that all the other motors on the MK3 run much cooler than the MK2. Only the extruder runs hotter.

Posted : 25/12/2017 10:46 pm
kaina.c
(@kaina-c)
Active Member
Re: Scorching Hot Extruder Motor



I'm running my MK2S and new MK3 (Merry Christmas to me!) right next to each other and have been printing for an hour now:

Ambient - 23C
MK2S Extruder - 32C
MK3 Extruder - 51C

MK2-S: v3.0.11
MK3: v3.1.1

Definitely a marked difference but, if within specs and mods are happy, then I'm okay running it warmer than the MK2S.

Note that all the other motors on the MK3 run much cooler than the MK2. Only the extruder runs hotter.

MK3 vs MK2S:

X axis: 31.6C / 31.6C
Y axis: 33.9C / 31.8C
Z axis: 29.5C / 36.9C
E axis: 48.8C / 32.1C

Not seeing a huge difference here, other than the MK3 printing a little faster (way faster on solid layers).

Posted : 25/12/2017 10:59 pm
JLTX
 JLTX
(@jltx)
Reputable Member
Re: Scorching Hot Extruder Motor




I'm running my MK2S and new MK3 (Merry Christmas to me!) right next to each other and have been printing for an hour now:

Ambient - 23C
MK2S Extruder - 32C
MK3 Extruder - 51C

MK2-S: v3.0.11
MK3: v3.1.1

Definitely a marked difference but, if within specs and mods are happy, then I'm okay running it warmer than the MK2S.

Note that all the other motors on the MK3 run much cooler than the MK2. Only the extruder runs hotter.

MK3 vs MK2S:

X axis: 31.6C / 31.6C
Y axis: 33.9C / 31.8C
Z axis: 29.5C / 36.9C
E axis: 48.8C / 32.1C

Not seeing a huge difference here, other than the MK3 printing a little faster (way faster on solid layers).

Your Y on MK2S runs way cooler than mine ever did. It was the hottest, but all were hotter than you get. Yet it printed like a champ.

Posted : 26/12/2017 5:50 am
mmmmmmmmmmmmm
(@mmmmmmmmmmmmm)
Trusted Member
Re: Scorching Hot Extruder Motor

I suppose you could splice heavier gauge leads on the stepper but I think it's within spec, as is.

Posted : 26/12/2017 5:51 am
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