nicks hysteresis calibrator

by nicksears, published

nicks hysteresis calibrator by nicksears Oct 14, 2015
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Disclaimer: I know the best solution to backlash is mechanical, but when other methods fail, you can compensate for hysteresis in most firmware (repetier at least, not marlin for now).

This is a set of circles with different "built in" x and y hysteresis. Each circle consists of four quarters that make it jerk in/out at the apex of each axis. Starting from the center, rows above the middle have the right half shifted upwards compared to the original. Columns to the right of the middle have the top half shifted to the right compared to the original. Each row away from the center shifts the specified segments by the amount in the file name (ie 0.5, 0.25mm). Going in the opposite direction reverses this.

I tested this with a rather thick nozzle, so YMMV.

Print Settings


Doesn't Matter


Doesn't Matter


0.2-0.6mm layers


Positive and negative backlash are included (even though this doesn't actually exist) because it will switch depending on the direction of motion your printer uses to draw the circles. If you notice your slic3r does not make all circles in the same direction (counter/clockwise) this WILL NOT WORK.

Circular shells have a wall thickness of 3.0mm and it prints best with no infill, no top solid shells, and at least 1 bottom shell. If you notice your slic3r makes solid shells in between the quarters something is wrong and this WILL NOT WORK.

You can cut off the bottom 0.2mm solid layer if you don't need it (makes it easier to remove the whole set and keep them placed/oriented).


The center circle should be perfect if you have no noticeable blacklash. Otherwise, determine which circle looks best and apply the necessary hysteresis correction. For circle you move over, apply every row you move over It's better to under-do it and then do a set of circles with a finer change (0.25 vs 0.5). When connected in repetier (host), go to Config -> Firmware EEPROM Configuration, and find backlash settings.

I made the circular and square cuts near one corner so you can make sure none of your axes are flipped. I don't think you will ever want to use a negative value for backlash.

How I Designed This

Made in solidworks 2015 student so sorry it's not customizable unless you have that version or newer.

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