Wonky printing

[David Brelsford]

Ok, so I have not been able to spend as much time with my new toy as I wish, but that is a long story. The last time I printed, I tried to do the 3d knot that is in the examples tab of Rep. 

Mk 6+

I printed with a raft. 

225/110

I did not change any of the settings- just used defaults.

The base came out ok, if you look at the picture, there is some minor curling.

what I am concerned with is the wonkiness of the next few layers. The bottom of the knot is skewed. I noticed when it was printing, that some of the layers were actually getting in the way of the nozzle as it moved by. 

here is a link to my wordpress blog that I just set up to document this journey.

Wonky print

I am looking for suggestions. Based on what I have been reading here, I am first going to try having some air blowing on the print- I am not sure how yet, as I cant really make one of the blower attachments from thiniverse until I get some of this figured out. 

any suggestions would be greatly appreciated. I know that some of the more prolific posters have probably answered this a zillion times (yes I do know how many zeros a zillion is- I'm a math teacher). For that I am sorry. I have to be honest, there is so much information here, and I am a rank beginner. Most of the discussions are going over my head. People with obviously much more experience talk about skienforge settings, and I dont even know where to find them. I don't plan on being new at this long, so please bear with me and my old questions....

My goal is to learn this so later this year, or next year I can use this in my class. My kids are mesmerized by it. 

thanks much

dave

[David Brelsford]

I was hoping that some one could give me some ideas?

[W. Craig Trader]

Frankly, it looks as though you're having problems with the Z-stage slipping.  Look for recent threads discussing Z-hold settings.  I can't speak to it personally -- I've never had *that* problem.

- Craig -

On Fri, Feb 24, 2012 at 09:12, David Brelsford <david.b...@gmail.com> wrote:

I was hoping that some one could give me some ideas?

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[David Brelsford]

Thanks very much Craig. I will do that.

[hellphish]

In firmware 3.1, the Z hold setting is inverted. The simple test is to
try to spin the Z axis leadscrew while printing. If it spins freely,
toggle the z hold setting in the motherboard onboard preferences,
commit, reset and try again.

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