1 Topic by Claghorn

  • Claghorn
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  • From: Delray Beach, FL
  • Registered: 2012-10-22
  • Posts: 730

Topic: Irregular printing only near back of platform?

I've been fooling around with printing a TARDIS, and I'm finding strange issues I've never seen before:

http://home.comcast.net/~tomhorsley/har … ardis.html

The back side of one of the parts is quite irregular compared to the other three sides:

http://home.comcast.net/~tomhorsley/hardware/solidoodle/tardis/thumb-back.jpg

(Higher resolution images available from the link above).

My only theory so far is that the wiring harness is making the head rock when it gets that close to the back of the platform, but I don't know if that is much of a theory :-). Any other theories?

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2 Reply by justsomeguy

  • justsomeguy
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  • Registered: 2012-10-31
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Re: Irregular printing only near back of platform?

Do you have wooden platform?  Mine leans so far forward that to get it level I have the front leveling screws turned almost all the way down and the single one closer to the z mechanism is barely turned.  This leave the front stiff and the back very soft and bouncy.  I'm going to try adding another spring and or some washers to add more tension.  It takes very little pressure currently to make the back move in Z.

3 Reply by Claghorn

  • Claghorn
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  • From: Delray Beach, FL
  • Registered: 2012-10-22
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Re: Irregular printing only near back of platform?

Nope, I have the new aluminum platform, and seems to be quite level these days after I fought with it for a while.

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4 Reply by Claghorn

  • Claghorn
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Re: Irregular printing only near back of platform?

It definitely appears to be geometry related. I printed one of the side panels and got the same errors along the back edge, so the next one I printed as close to the front of the bed as possible, and the back edge printed as perfectly as the front edge.

I supposed it could be the filament dragging on the print head as well as the wire harness.

I should try installing a head wobble preventer and see if things get better: http://www.thingiverse.com/thing:44572

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5 Reply by Claghorn

  • Claghorn
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Re: Irregular printing only near back of platform?

It was definitely the print head rocking. I added this thing: Solidoodle Springloader and the print quality improved enormously for stuff near the back of the print bed. Example at http://home.comcast.net/~tomhorsley/har … gload.html

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