X axis layer shift - Cables hitting the frame before extruder body. How to solve this?
 
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X axis layer shift - Cables hitting the frame before extruder body. How to solve this?  

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Tom Kelly
(@tom-kelly)
New Member
X axis layer shift - Cables hitting the frame before extruder body. How to solve this?

Towards the end of a print my mk3 layer shifted on the X axis. I don't think it homed during the print.

Having read online I have discovered that the extruder cable bundle collides with the frame before the extruder does. 

The cable tie bundle starts 10mm away from the extruder body and no cable tie collides. however the cables seem to collide with the frame and electrical box. 

Could this be the issue? If so how do I solve this? I was thinking about introducing a split washer to the X axis that the printer could home against.

Posted : 28/05/2022 12:04 pm
fuchsr
(@fuchsr)
Famed Member
RE: X axis layer shift - Cables hitting the frame before extruder body. How to solve this?

Pictures? If the cable bundle is installed as per the assembly manual, there's no way it can hit the frame. Unless you forgot to properly attach the nylon guide cable inside  (which I confess, I have done myself…)

Posted : 28/05/2022 9:14 pm
jsw
 jsw
(@jsw)
Famed Member
RE: X axis layer shift - Cables hitting the frame before extruder body. How to solve this?

Yes, the cable bundle should be leading straight back from the center of the X carriage, wire-tied to the extension on the extruder body.

It should be assembled such that it misses hitting the power supply when it is to the left extreme position.

That piece of nylon filament is important, as it directs the cable bundle into its correct shape and position.

Posted : 28/05/2022 9:48 pm
Tom Kelly
(@tom-kelly)
New Member
Topic starter answered:
RE: X axis layer shift - Cables hitting the frame before extruder body. How to solve this?

Attached is a picture. The plastic insert is inside. This issue has only occurred once and I have not been able to replicate it. It occurred once near the end of a very long print 🙁 

Posted : 28/05/2022 9:49 pm
fuchsr
(@fuchsr)
Famed Member
RE: X axis layer shift - Cables hitting the frame before extruder body. How to solve this?

Hard to judge from the picture but the zip ties seem okay. Just because the nylon wire is inside doesn't mean it's properly connected. I'd double check that it's still inside the extruder assembly and didn't get dislodged when the z axis moved up. Beyond that I'm out of ideas. 

Posted : 28/05/2022 9:57 pm
jsw
 jsw
(@jsw)
Famed Member
RE: X axis layer shift - Cables hitting the frame before extruder body. How to solve this?

Where, exactly, does it hit?

Power supply?  Some other piece of the assembly?

Posted : 28/05/2022 10:02 pm
Tom Kelly
(@tom-kelly)
New Member
Topic starter answered:
RE: X axis layer shift - Cables hitting the frame before extruder body. How to solve this?

I believe it sometimes catches on the control box 

 

Posted : 28/05/2022 10:42 pm
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