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Elongated prints

Posted by ekul3e3

ekul3e3

Elongated prints
November 15, 2014 11:09PM

Registered: 9 years ago
Posts: 11

ok, i just got my i3 working and now it seems that whenever i make an attempt at printing something it works fine for a bit and then the y-axis "acts up" and attempts the print the next layer in another random position. here is a pic of a lego brick i tried to print...
(here)
(here)

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SteveRoy

Re: Elongated prints
November 16, 2014 12:03AM

Registered: 10 years ago
Posts: 477

what calibration have you done to the printer?

Steve

My updated Instructable on our Prusa i3 Build
[www.instructables.com]

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jbernardis

Re: Elongated prints
November 16, 2014 02:50AM

Registered: 11 years ago
Posts: 1,320

I can't see the pics because there are too many connections to the server, but if the effects are random, suspect either loose belts, or dropping steps because of an improperly set stepper driver. Miscalibration effects are usually consistently off

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ekul3e3

Re: Elongated prints
November 16, 2014 10:07AM

Registered: 9 years ago
Posts: 11

the only calibrtion i have done is follow this site

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ekul3e3

Re: Elongated prints
November 16, 2014 05:46PM

Registered: 9 years ago
Posts: 11

i tightened the y-axis and nothing changed

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SteveRoy

Re: Elongated prints
November 17, 2014 12:59AM

Registered: 10 years ago
Posts: 477

Have you tried adjusting the stepper pot? The stepper maybe overheating causing missed steps

Steve

My updated Instructable on our Prusa i3 Build
[www.instructables.com]

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ekul3e3

Re: Elongated prints
November 18, 2014 09:53PM

Registered: 9 years ago
Posts: 11

Ok, i tried an experiment, i switched the x and y axis and then the "wandering" switched to the x-axis. So that means that it could have to do with the stepper pots (thanks SteveRoy) or the firmware. I would adjust the stepper pots but the problem is that it doesn't seem like anything is wrong until i actually start a print and then it just kind of lose's its position.

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jbernardis

Re: Elongated prints
November 18, 2014 10:05PM

Registered: 11 years ago
Posts: 1,320

Quote
ekul3e3
... it doesn't seem like anything is wrong until i actually start a print ...

Many times, that's what you would see if your stepper drivers are not adjusted properly. You are not stressing the printer enough with your manual moves, but when you start sending a stream of commands with changes in direction and acceleration, your problems will surface.