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Old 05-21-2017, 08:37 PM
Marc Bourget Marc Bourget is offline
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Join Date: May 2013
Location: North Ca
Posts: 716
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That's because this requires a higher order of math.

The reason the accuracy differs from one area to another is that they haven't allowed for the Catenary Curve of the chains.

In physics and geometry, a catenary is the curve that an idealized hanging chain or cable assumes under its own weight.

In the lower right corner the right hand chain will be more vertical and the catenary will be very low.

Just the opposite with the left hand chain, it's weight would cause it to droop and the + x position would be less than what the stepper motor is telling the controller.

FWIW
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