After crash detection, printer no longer understands Y axis location
 
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MScott
(@mscott)
New Member
After crash detection, printer no longer understands Y axis location

Need some help, please. I have a stock i3 Mk3s printer. It's been printing fine for a few weeks. I was re-printing something today, that I printed successfully over the weekend, and I noticed that there was a "crash" detected and immediately hit the X to stop the printing. I raised the Z by using the controls, cleaned the nozzle and the print bed. However, the printer now no longer understand the Y axis position. The printer tries to print off the back of the print bed. The nozzle gets to the rear of the print bed and chatters. I re-ran the calibration wizard and that runs just fine up until the printer starts to print the test pattern for the Z adjustment. The extruder goes to the back of the printer, chatters then prints from the rear forward. It no longer "homes" the extruder to prime the nozzle. Finally, when trying to move the axis via the control panel, I cannot adjust the Y axis any greater than -4.0. It will not move any further back. I can adjust the X axis.

I'm not sure what to try to fix this.

Posted : 13/04/2020 7:38 pm
MScott
(@mscott)
New Member
Topic starter answered:
RE: After crash detection, printer no longer understands Y axis location

Update: With the printer off, I moved the heatbed manually. Pulling it to the front is very smooth and moves easily. Moving the bed to the rear, the motor seems to tighten up and it's harder to move the bed. The belts don't chatter but it is certainly noticeably more difficult to move the bed to the rear. Is this normal? 

Posted : 13/04/2020 7:54 pm
JoanTabb
(@joantabb)
Veteran Member Moderator
RE: After crash detection, printer no longer understands Y axis location

lube the y axis smooth rods and move the carriage again see if it loosens up!

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 : 13/04/2020 8:18 pm
nilok
(@nilok)
Estimable Member
RE: After crash detection, printer no longer understands Y axis location

Have you checked your grub screws and belt tensions?  Did you build the kit or order it assembled? Does your x and y axis move freely by hand, or do you feel a lot of resistance anywhere?  Did you grease the bearings during assembly, or try adding a tiny bit of machine oil to the rods?

Is your printer grinding? Bearings squeaking? Motors smoking?
Step 1) Wash your Steel Sheet
Step 2) Return to Step 1

Posted : 13/04/2020 8:19 pm
MScott
(@mscott)
New Member
Topic starter answered:
RE: After crash detection, printer no longer understands Y axis location

@joantabb

Thank you very much. That was it. A little grease fixed the issue.

How often should I expect to have to grease the rods? Does it depend on how much printing or is there a generally accepted rule of every few weeks?

Thanks again,

Mark

Posted : 13/04/2020 9:09 pm
MScott
(@mscott)
New Member
Topic starter answered:
RE: After crash detection, printer no longer understands Y axis location

@nilok

I have not checked the grub screws but the belt tension seems fine. As Joan suggested, I needed to lube the rods. I purchased the kit and assembled it a few weeks ago. I did not grease the bearings during assembly as it appeared they came from the factory with a little machine oil on them. Both the X and Y axis move well. I did apply a little bit of lubricant to the X axis rods as well. I used the lubricant included with my kit. Do you suggest using that or should I use some light machine oil, such as 3-in-1 oil?

Thank you.

Mark

Posted : 13/04/2020 9:15 pm
JoanTabb
(@joantabb)
Veteran Member Moderator
RE: After crash detection, printer no longer understands Y axis location

The printers need a little lubrication all of the time

 Now that the printer is built. Add grease on the smooth rods. periodically

When you need to do maintenance. Then lube the bearings on the inside...

No point breaking the printer now that its working

 

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 : 13/04/2020 9:58 pm
MScott liked
nilok
(@nilok)
Estimable Member
RE: After crash detection, printer no longer understands Y axis location

Joan's advice is excellent, as is the included lube, but be aware that there could be a small risk involved.  On my first build I followed the instructions and did not lube the bearings.  I had issues and crashes almost immediately.  Support had me lube the rods with the included tube and it did work, but within a few weeks I had grinding and a scratched x-rod.  Support took care of replacements and was excellent to work with, but by that time I had already assembled another kit and fully packed the bearings on that one.  The difference was significant.  When my warranty parts arrived I tore the 1st kit down to pack all the bearings and it has been amazing since.

I don't post this to disagree with anything....just to offer the opinion that if your ungreased bearings are already giving you issues, a teardown and pack may save you potential downtime waiting on warranty parts.

Is your printer grinding? Bearings squeaking? Motors smoking?
Step 1) Wash your Steel Sheet
Step 2) Return to Step 1

Posted : 13/04/2020 10:13 pm
nilok
(@nilok)
Estimable Member
RE: After crash detection, printer no longer understands Y axis location
Posted by: @mark-scott66prusa

@nilok

Do you suggest using that or should I use some light machine oil, such as 3-in-1 oil?

If you have not used the included lube, then yes......I would use a small amount of machine oil on each rod.  Be careful none drips on the bed, but the oil will be better at penetrating under the dust seals.  If you have already used the lube, then no.  Its usually not great to mix greases and oils.

This post was modified 4 years ago by nilok

Is your printer grinding? Bearings squeaking? Motors smoking?
Step 1) Wash your Steel Sheet
Step 2) Return to Step 1

Posted : 13/04/2020 10:26 pm
MScott liked
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