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Prints getting shunted sideways part way up

friarfish

Prints getting shunted sideways part way up
January 18, 2016 12:05AM

Registered: 10 years ago
Posts: 169

Okay, this is not a consistent problem.
I have a print right now that about a mm or so up from the base
has been moved 2mm across. What is causes this? Is this one of
those comms errors i've heard pronterface suffers from?

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RRuser

Re: Prints getting shunted sideways part way up
January 18, 2016 08:11AM

Registered: 11 years ago
Posts: 444

Shifted layers are from the motor skipping steps.

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JamesK

Re: Prints getting shunted sideways part way up
January 18, 2016 09:53AM

Registered: 10 years ago
Posts: 1,873

Lots of possible causes, take a look through this excellent summary: [reprap.org]

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friarfish

Re: Prints getting shunted sideways part way up SOLVED
January 19, 2016 05:57AM

Registered: 10 years ago
Posts: 169

Hey folks,
I hadn't realised the USB comms were so dicky. I think I will write it off
as just that. Time to dig out the old SD cards.

Thanks for the help.
Andrew

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JamesK

Re: Prints getting shunted sideways part way up SOLVED
January 19, 2016 07:00AM

Registered: 10 years ago
Posts: 1,873

If a print shifts and stays shifted, or continues to shift, I don't think that is a usb comms problem. The g-code coordinates are absolute, so you can't get an offset through a comms problem.

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the_digital_dentist

Re: Prints getting shunted sideways part way up
January 19, 2016 07:28AM

Registered: 12 years ago
Posts: 5,798

Without a picture, without knowing what sort of machine you have, and without knowing any of the printing parameters such as speed, acceleration, and jerk, it's pretty hard to say what is causing your problem.

Ultra MegaMax Dominator 3D printer: [drmrehorst.blogspot.com]

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friarfish

Re: Prints getting shunted sideways part way up SOLVED
January 21, 2016 04:31AM

Registered: 10 years ago
Posts: 169

The erratic occurrence of this problem make me lean towards a comms error.
I'll reprint the same model a few times and the problem won't occur.
A bit annoying but I think I'll switch to SD card for big stuff from now on.

Thanks folks for the help.

Andrew