Backlash move midway on linear move since update

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10 years 4 months ago #75661 by NHGeorge
I know what your saying and I can watch the machine/steppers make the move while not touching the part sometimes based on speed and length of the passes it may happen on all four sides or just one and is repeatable. I have redone my step config and only thing at this point that is changed is the latency figure is 3k less than before 16k-13k. I am going to test and work my way with the new ini file back into the backlash and following error changes that previously worked and try to find more clues.

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10 years 4 months ago #75673 by Rick G
As you are making air cuts for testing perhaps dramatically increase the backlash setting to make it easier to see what is going on and see it the mid way move also increases,

Rick G

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10 years 4 months ago #75682 by LearningLinuxCNC
Is it possible that the G54 coordinate system is rotated by some very small amount causing a very small y move when a straight x move is requested therefore kicking in the backlash compensation. Same would occur on a long enough move in the y direction with a small step in the x direction.

You might try resetting the G54 coordinate system so that it has 0 rotation. I am just grasping at straws here but it appears that it could cause the behavior you are talking about.

Jim

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