Z axis won't return home (up) after calibration test print.
 

Z axis won't return home (up) after calibration test print.  

  RSS
Lightwave
(@lightwave)
Active Member

Hi.

I just finished the wizard setup calibration but the printer won't return to what I assume would be "home" with the extruder at the top of the Z axis so I can access my print sheet. I can manually move it all the way up but that seems lika a hassle. Any thoughts?

Posted : 18/05/2020 12:48 pm
Lightwave
(@lightwave)
Active Member

Hm, maybe I was mistaken. I guess it's not supposed to reset to the top position? Just did the Prusa logo print and now my bed moved all the way to the front for easy access.

Posted : 18/05/2020 1:57 pm
joan.t
(@joantabb)
Veteran Member Moderator

sometines the Minda goes faulty and reads '1' all of the time. this tells the controller that the Minda is going to crash into the heatbed, this causes the controller to back off, and as the Minda still says '1' it backs off again, all of the way tot he top... 

I have had this on the mk2 which uses the same type of Pinda/Minda
It may be your problem, 
In my case the problem was a broken wire. in the Pinda cable which had fractured due to repeated flexing,

regards Joan

I try to make safe suggestions,You should understand the context and ensure you are happy that they are safe before attempting to apply my suggestions, what you do, is YOUR responsibility. Location Halifax UK...
Posted : 18/05/2020 2:15 pm
Lightwave liked
Lightwave
(@lightwave)
Active Member
Posted by: @joantabb

sometines the Minda goes faulty and reads '1' all of the time. this tells the controller that the Minda is going to crash into the heatbed, this causes the controller to back off, and as the Minda still says '1' it backs off again, all of the way tot he top... 

That sounds like the print head would move all the way up? My initial problem was that it stayed close to the bed so I couldn't access the sheet. But maybe I'm misunderstanding what you said. It's my first time with a printer.

Posted : 18/05/2020 2:20 pm
Matteo Cristini
(@matteo-cristini)
Reputable Member

My mini never moves the Z axis up after a print. It just stops were it is, and the Y axis moves all the way to the front. Sounds like normal behavior to me. Hope it helps.

Edit: if necessary, you can check if your minda probe is working by looking at the red led ring on top of it. Use a metal tool near the plastic tip or move the z axis close to the bed and see if it triggers.

This post was modified 5 months ago by Matteo Cristini
Posted : 18/05/2020 3:18 pm
Lightwave
(@lightwave)
Active Member

Ah cool. Thanks. Will check the minda after my benchy is done!

Posted : 18/05/2020 3:55 pm
joan.t
(@joantabb)
Veteran Member Moderator

@lightwave

I misunderstood your symptoms

regards Joan

I try to make safe suggestions,You should understand the context and ensure you are happy that they are safe before attempting to apply my suggestions, what you do, is YOUR responsibility. Location Halifax UK...
Posted : 19/05/2020 12:04 am
joan.t
(@joantabb)
Veteran Member Moderator

@matteo-cristini

for information there is a failure mode where the red light flashes but the controller does not see the signal, 

as your printer ages, the repeated flexing of your cable bundle as the print heat goes from side to side, can cause metal fatigue and stress fractures in the wires, if the output wire in the Minda cable breaks but the 5 volts and ground wires are still good,  the Minda will still appear to work by the LED display, but the signal will not get back to the controller board

regards Joan

I try to make safe suggestions,You should understand the context and ensure you are happy that they are safe before attempting to apply my suggestions, what you do, is YOUR responsibility. Location Halifax UK...
Posted : 19/05/2020 12:13 am
crawlerin
(@crawlerin)
Honorable Member
Posted by: @lightwave
 
That sounds like the print head would move all the way up? My initial problem was that it stayed close to the bed so I couldn't access the sheet. But maybe I'm misunderstanding what you said. It's my first time with a printer.

I opened GitHub for this asking they park the head higher, and I was not the first or the last one. It's a bit inconvenient when you need to manually move Z axis up in order to be able to take sheet off the bed to clean it.

Posted : 20/05/2020 1:01 am
kevman
(@kevman)
Estimable Member

mine does the same thing, I use Octoprint and have put in some gcode at the end of the print  to raise it. 

Posted : 22/05/2020 3:26 pm
Lightwave
(@lightwave)
Active Member
Posted by: @matteo-cristini

Edit: if necessary, you can check if your minda probe is working by looking at the red led ring on top of it. Use a metal tool near the plastic tip or move the z axis close to the bed and see if it triggers.

Just put some scissors near it and it triggered. Thank you for that.

Posted by: @crawlerin

I opened GitHub for this asking they park the head higher, and I was not the first or the last one. It's a bit inconvenient when you need to manually move Z axis up in order to be able to take sheet off the bed to clean it.

Exactly. Good to know it's been reported and hopefully we'll see it in a future update!

Posted by: @kevman

mine does the same thing, I use Octoprint and have put in some gcode at the end of the print  to raise it. 

Smart. Thanks for the tip.

Posted : 24/05/2020 4:44 pm
Share:

Please Login or Register