1 Topic by tylerl423

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Topic: Y axis skipping, just started doing it!

I just recently replaced my extruder on my SD3 with an E3d V6 and it seems that my Y axis is always shifting during the print. It will always go backwards until it hits the stopper and continues to kinda just freak out (not sure the terminology XD). I have already done the entire y axis realignment a few times and I get perfect circles just like i should but I can't get it to stay aligned. It looks like the print pauses for a split second then continues all of a sudden in a different spot on the y axis towards the back. ABS does this worse than when i print in PLA.

2 Reply by jagowilson (edited by jagowilson 2015-09-08 18:25:28)

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Re: Y axis skipping, just started doing it!

turn up VREF on Y a small bit and see if it goes away. also, see below \/

3 Reply by wardjr

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Re: Y axis skipping, just started doing it!

Because you state a change between ABS and PLA I'd guess over extrusion.
A fan on the control board will help if you don't already have one.
Start with calibrating E: steps per mm and extrusion multiplier.  Both are covered in the WIKI.

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4 Reply by tylerl423

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Re: Y axis skipping, just started doing it!

Ive already calibrated the steps and its extruding the correct amount but its still skipping. Heres a video of what its doing.[https://www.youtube.com/watch?v=DvH_3V94RnE]

5 Reply by jagowilson (edited by jagowilson 2015-09-08 19:10:54)

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Re: Y axis skipping, just started doing it!

did you raise vref as suggested? over time the trimpots do move a bit due to heating and cooling. it probably needs just a tiny nudge to the right.

6 Reply by tylerl423

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Re: Y axis skipping, just started doing it!

How do i raise the VREF?

7 Reply by IronMan (edited by IronMan 2015-09-08 19:46:14)

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Re: Y axis skipping, just started doing it!

jagowilson wrote:

did you raise vref as suggested? over time the trimpots do move a bit due to heating and cooling. it probably needs just a tiny nudge to the right.

^What he said...

EDIT: Vref potentiometer looks something like this:
http://soliforum.com/i/?q76oE9k.png

Also, you may want to check the set screws in the Y drive pulleys to make sure they're tightened as well as the tension of the belts...

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8 Reply by tylerl423

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Re: Y axis skipping, just started doing it!

Thank you guys so much i finally have it working again! Not sure exactly what i did, just spun a little metal piece clockwise and then my printer started freaking out so i unplugged it and spun it the other way a little so I'm honestly not sure what i did but it worked. As you guys can probably tell I'm not great with the hardware side of electronics.

9 Reply by grob

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Re: Y axis skipping, just started doing it!

Haha that would be the Vref pot. They're very sensitive, the tiniest little nudge will make a big difference! No surprise it freaked a bit. smile
Glad to hear it's sorted, keep an eye out in case it needs another slight adjustment in the future.

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