[MK3S+] Z Axis Steppers stay on and get warm when the printer is on idle. (I know this is done on purpose but I still want them to turn off!)
 
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[MK3S+] Z Axis Steppers stay on and get warm when the printer is on idle. (I know this is done on purpose but I still want them to turn off!)  

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jaddel
(@jaddel)
Active Member
[MK3S+] Z Axis Steppers stay on and get warm when the printer is on idle. (I know this is done on purpose but I still want them to turn off!)

Hi,

I prototype a lot and actually never switch of the MK3, it's almost like a paper printer that just does the job right away when you klick print.

I know Prusa keeps the z axis steppers on to keep them under torque. I still don't really understand why they do it. When I power of the printer and power it back on all it does to calibrate is the bed leveling that's done before every print. There is no re calibration of the z axis or anything else and when the printer is turned of the z axis stays perfectly in place...

1.  So, why do they need to keep the steppers powered? 

2. Can I anyhow workaround this behavior and have them turned off after a print is finished? 

 

 

Napsal : 09/11/2021 8:00 am
cwbullet
(@cwbullet)
Member
RE: [MK3S+] Z Axis Steppers stay on and get warm when the printer is on idle. (I know this is done on purpose but I still want them to turn off!)

G code is the answer.  

Z axis: M18 Z E

All axis: M18 

 

--------------------
Chuck H
3D Printer Review Blog

Napsal : 09/11/2021 11:21 am
jaddel
(@jaddel)
Active Member
Topic starter answered:
RE: [MK3S+] Z Axis Steppers stay on and get warm when the printer is on idle. (I know this is done on purpose but I still want them to turn off!)

thx, I think I already tried M84 which didn't do anything and it was supposed to be the same as M18.

https://marlinfw.org/docs/gcode/M018.html

I'll give M18 a try right away. 

Posted by: @cwbullet

G code is the answer.  

Z axis: M18 Z E

All axis: M18 

 

 

Napsal : 09/11/2021 2:07 pm
jaddel
(@jaddel)
Active Member
Topic starter answered:
RE: [MK3S+] Z Axis Steppers stay on and get warm when the printer is on idle. (I know this is done on purpose but I still want them to turn off!)

The gcode commands M18 and M84 don't do anything. The z steppers are still warm a few hours after executing it. 

Napsal : 09/11/2021 3:09 pm
BogdanH
(@bogdanh)
Honorable Member
RE: [MK3S+] Z Axis Steppers stay on and get warm when the printer is on idle. (I know this is done on purpose but I still want them to turn off!)
Posted by: @jaddel

The gcode commands M18 and M84 don't do anything. The z steppers are still warm a few hours after executing it. 

I haven't personally checked, but according to this, it seems that for Prusa, timeout parameter must be defined for M84 to work.

[Mini+] [MK3S+BEAR]

Napsal : 09/11/2021 5:44 pm
jaddel
(@jaddel)
Active Member
Topic starter answered:
RE: [MK3S+] Z Axis Steppers stay on and get warm when the printer is on idle. (I know this is done on purpose but I still want them to turn off!)

M18 S10

The steppers are still warm after a few hours. :/

Napsal : 10/11/2021 1:57 pm
Neophyl
(@neophyl)
Illustrious Member
RE: [MK3S+] Z Axis Steppers stay on and get warm when the printer is on idle. (I know this is done on purpose but I still want them to turn off!)

I think the MK3 uses the M84 command not M18.  Did you try the M84 S?? format

Napsal : 10/11/2021 3:33 pm
cwbullet
(@cwbullet)
Member
RE: [MK3S+] Z Axis Steppers stay on and get warm when the printer is on idle. (I know this is done on purpose but I still want them to turn off!)

Have you thought about chatting with support?  

--------------------
Chuck H
3D Printer Review Blog

Napsal : 11/11/2021 11:25 pm
towlerg
(@towlerg)
Noble Member
RE: [MK3S+] Z Axis Steppers stay on and get warm when the printer is on idle. (I know this is done on purpose but I still want them to turn off!)

how about M112 or M410, perhaps a bit too drastic. Or with M84 try specifying the Z stepper explicitly, apparently without S parameter.

Does anybody know what the first parameter does?

Napsal : 12/11/2021 10:56 am
Stefan
(@stefan-3)
Estimable Member
RE: [MK3S+] Z Axis Steppers stay on and get warm when the printer is on idle. (I know this is done on purpose but I still want them to turn off!)

So, why do they need to keep the steppers powered? 

i wondered about that, too.

After thinking about it for a long time, my own explanation would be:

If you touch the extruder (cold pull, clean nozzle...) there is the risk that the left and/or right z-stepper are moved and the x-axis movements are no longer parallel to the bed.

Napsal : 12/11/2021 12:20 pm
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