Skewed print

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afrokid
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Joined: Thu May 08, 2014 12:09 pm

Skewed print

Post by afrokid » Sat Aug 16, 2014 2:56 pm

Hi guys, I've had my mini for a few months now, and it's started to develop a "skewing" error.

It for some reason prints the model, but during the print (different heights in different models), it shifts on the Y axis by around a millimeter which ruins the model.

I thought it may of been an issue with the transfer between my pc and printer but have formatted my pc, new usb cable and it is still doing it so it must be the printer. I don't know a whole lot about it so I have no idea of the cause. Has anyone else had this problem?

Here is an image of what it is doing. This is supposed to be a flat surface.
Image


Thank you.

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KCSteve
Posts: 25
Joined: Tue Jul 29, 2014 3:42 pm
Location: Kansas City, MO USA

Re: Skewed print

Post by KCSteve » Sun Aug 17, 2014 11:06 am

Check inside for bits of 'stuff' - I had this sort of thing happen and it appeared to be due to a bit of plastic getting into the works.
Enjoy!

KCSteve :->

afrokid
Posts: 2
Joined: Thu May 08, 2014 12:09 pm

Re: Skewed print

Post by afrokid » Sun Aug 17, 2014 6:42 pm

I thought it may be that but it is the Y axis that is being effected and that is up the top so nothing should fall into it. I gave it a blow out to remove the dust and it still seems to be doing it.

jeeplvr
Posts: 212
Joined: Sat Jun 08, 2013 5:26 am

Re: Skewed print

Post by jeeplvr » Sun Aug 24, 2014 9:32 pm

I have the same issue. I am getting prints that are skewed to the right. Something is moving as the build plate moves on the Z axis.

jeeplvr
Posts: 212
Joined: Sat Jun 08, 2013 5:26 am

Re: Skewed print

Post by jeeplvr » Sun Aug 24, 2014 9:39 pm

Also your issue looks like the perf board or print head is moving during the print process. Look for a gap between the magnets on the print head. My issue has the entire model gradually skewing to the right causing all my models to lean and be out of square.

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DrewPetitclerc
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Re: Skewed print

Post by DrewPetitclerc » Sun Aug 24, 2014 11:09 pm

jeeplvr wrote:Also your issue looks like the perf board or print head is moving during the print process. Look for a gap between the magnets on the print head. My issue has the entire model gradually skewing to the right causing all my models to lean and be out of square.
Did you ever do the "Calibration print" and if you did, did you only enter the values once.
One of my coworkers, early in their training, did not notice the values where entering and so they kept typing and entering a couple of times the same values, this actually causes the system to add them up and you can get a very interesting leaning tower of Pizza, in their case it got so bad that no matter how small the part was, the system kept telling them the print was "out of range" of the build area.
You need to "clear" the original values then do a calibration print, enter new values, run new calibration print then enter values, each time you can close in on the closest solution.

Regards
Drew
Drew Petitclerc
Petitclerc Designs
Owner/Senior Principal Designer, prototype, tooling and test equipment design and 3D printing
http://flash-graphics.deviantart.com/
http://www.thingiverse.com/DrewPetitclerc

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DrewPetitclerc
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Re: Skewed print

Post by DrewPetitclerc » Mon Aug 25, 2014 5:10 am

Also be sure "NOT TO MOVE" the part around during the slicing phase when going to print, even a small movement of the part using the mouse and the control key on PC can cause an interesting slide effect in the print, another new trainee at work got a smeared print and I had to work out how they did it, the slicing engine keeps working as the part is moved making fun.

Regards
Drew
Drew Petitclerc
Petitclerc Designs
Owner/Senior Principal Designer, prototype, tooling and test equipment design and 3D printing
http://flash-graphics.deviantart.com/
http://www.thingiverse.com/DrewPetitclerc

jeeplvr
Posts: 212
Joined: Sat Jun 08, 2013 5:26 am

Re: Skewed print

Post by jeeplvr » Mon Aug 25, 2014 12:32 pm

Ok I am working on the calibration. The UP calibration is the goofiest thing I have seen in a while. Absolutely no provisions for side to side deviation, only front to back. Wasting a lot of plastic figuring out what they call negative and positive deviation. Also the book says look for right and left deviation but they are not referencing the actual part, they are referencing the picture on a previous page lol. And you can only input 2mm at a time or it resets to zero.

jeeplvr
Posts: 212
Joined: Sat Jun 08, 2013 5:26 am

Re: Skewed print

Post by jeeplvr » Thu Aug 28, 2014 1:02 pm

Finished the calibration after wasting some serious plastic. It did fix the skew problem even the side to side issue.

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DrewPetitclerc
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Re: Skewed print

Post by DrewPetitclerc » Thu Aug 28, 2014 5:14 pm

Glad to hear that!
Happy making!
Drew Petitclerc
Petitclerc Designs
Owner/Senior Principal Designer, prototype, tooling and test equipment design and 3D printing
http://flash-graphics.deviantart.com/
http://www.thingiverse.com/DrewPetitclerc

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