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Revision to Centering the bed or setting the bed origin

David Crocker

The M208 S0 command defines the upper position limits of each axis, and the M208 S1 command defines the lower position limits. When an axis is homed to a low end (minimum) homing switch, the axis is assumed to be at the lower position limit. When it is homed to a high end (maximum) homing switch, it is assumed to be at the upper position limit. Therefore, changing the position limits in the M208 command will move the origin.
-Example: a Cartesian printer uses a low end X homing switch, which triggers when the head reference point (i.e. the nozzle in a single tool printer) is 8mm off the low-X edge of the bed. It uses a high-end Y homing switch, which triggers when the head reference point is 2mm off the high-Y edge of the bed. the bed is 200mm square.
+Example: a Cartesian printer uses a low end X homing switch, which triggers when the head reference point (i.e. the nozzle in a single tool printer) is 8mm off the low-X edge of the bed. It uses a high-end Y homing switch, which triggers when the head reference point is 2mm off the high-Y edge of the bed. The bed is 200mm square.
-1. Suppose we want to make X0 Y0 the centre of the bed. Then the Xmin edge of the bed is at X=-100 and the homing switch triggers at X=(-100-8) = -108mm. Similarly, the Ymax edge of the bed is at Y=100 and the Y homing switch triggers at Y=(100+2) n= 102mm. So we can use the following commands in config.g:
+1. Suppose we want to make X0 Y0 the centre of the bed. Then the Xmin edge of the bed is at X=-100 and the homing switch triggers at X=(-100-8) = -108mm. Similarly, the Ymax edge of the bed is at Y=100 and the Y homing switch triggers at Y=(100+2) = 102mm. So we can use the following commands in config.g:
[code]

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