![]() Loosen the set screws on the coupler, which used to fix the lead screw(X axis).Power on your CNC, open Mach3 and use the directional arrow button to bring the spindle near the coupler which connects the lead screw to the stepper motor.Loosen the screws anchoring the X Axis stepper motor to the side of the CNC.Assuming all is well, Move the bed all the way back and tighten up the stepper motor mount screws. Move the Bed/Y axis back and forth a few times and see how it runs.Now bring the bed/Y axis as far back towards the stepper motor as possible, making sure not to collide with the frame, and now tighten the remaining linear rail screws, as well as any loose bearings mount screws.With this done, tighten the two front screws connecting to the guide rails, as well as the two front-most bearing mounts. ![]() The further it is without colliding with the frame, the better.
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