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Odd z axis during print

Posted by Taw1985 
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Taw1985
Odd z axis during print
June 25, 2016 08:04PM
Just did a print, the x axis moves , but the print was only 30% it cut off most of the print, but cura said 100% complete. What happened.
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ggherbaz
Re: Odd z axis during print
June 29, 2016 02:54PM
Have you done the calibration of your axis? Z steps might be off.

Or your extruder or hotend might have failed?

Edited 1 time(s). Last edit at 06/29/2016 02:55PM by ggherbaz.
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Phytone
Re: Odd z axis during print
June 29, 2016 04:12PM
You are a genius. ....

During heat up, the steppers aren't on, so yes, it's not holding position. Activate steppers and it holds firm.
So, need to move z a mm to activate stepper.

Must be another way to switch on steppers? It's not connected to a pc, and the LCD just has option to turn steppers off, not on.
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Veesta
Re: Odd z axis during print
June 29, 2016 05:01PM
Run the homing procedure from your LCD panel.
It will turn the steppers "ON" and holds position after all axis find their home. (For a minute or two anyway)

Edited 3 time(s). Last edit at 06/29/2016 05:07PM by Veesta.
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Taw1985
Re: Odd z axis during print
June 30, 2016 04:03PM
Problem solved , stock marlin firmware had z axis steps/mm set to 4000 when it should of been 2560.
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ggherbaz
Re: Odd z axis during print
July 14, 2016 09:03PM
Not so fast, what kind of lead screw you have? It sounds by that number that you don't have 1/16 micro stepping, can you check in your board if you have all the jumpers plugged under the stepper driver (if ramps).
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blt3dp
Re: Odd z axis during print
July 18, 2016 11:43AM
2560 is correct for 8mm threaded rod with 1.8 degree Nema 17 and 1/16 microstepping.
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