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calibration huxley

Posted by adnanserim 
calibration huxley
February 12, 2013 01:25PM
hi all

when i print a plus (+), line is not going straight on X axis. i checked G code. there is no mistake in there. there is 2 or 3 mm mistake up line according to down line. i know i can't explain the problem well. but it is clear on picture. i,m using RAMPS 1.4. i thing problem in sprinter firmware. beacuse i checked belt, motor current, pulley.

i'm using this "float axis_steps_per_unit[] = {91.4286, 91.4286, 4000, 910};" but circles like egg. square is not square. where is mistake?

thanks for advice.
open | download - 20130212_175049.jpg (463.2 KB)
Re: calibration huxley
February 14, 2013 04:11AM
You migth be missing steps on the "horisontal" move, since the error seems to accure after the sideway move.
Re: calibration huxley
February 14, 2013 06:06AM
Looks like backlash in the X axis. Try turning the pulley by hand and see if there is a dead spot in the movement of the carriage when you change direction.

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