Step 9 in the print bed calibration instructions seems to be missing the adjustment of the Z limit adjusting screw. Shouldn't the last bullet say: If the nozzle contacts the bed turn the adjusting screw 1/2 turn counterclockwise then repeat step 9.? Unless an adjustment is made in this step the nozzle will always contact the bed or am I missing something here?
Thinking about this a little more, shouldn't step 10's Z adjustment be counterclockwise to move the bed a little closer to the nozzle, and step 9's Z axis adjustment clockwise to move the bed home position a little further away from the nozzle? This is a right-hand screw, right?
Post by cookingdad on Nov 25, 2014 15:45:54 GMT -5
I had a problem with my nozzles being too close at the center of the bed. Seems I had over-tightened the Y motor brackets to the frame causing a slight bend in the Y axis rod. Loosening the bolt just a tad took care of it. Just a heads up in case anyone else runs into this problem.
I have the same issue with the center of the bed being closer to the nozzle as well. I have tried loosening mounts and screws as suggested above with no significant change. I also have switched to the dial indictor method and the center of the bed seems to be almost .5 mm closer then the edges. What kind of accuracy are others able to get? Is 0.5 mm ok?
I had the same problem because i overtightened the mounts. Easiest way to fix it is to loosen all four mounts. That should relieve the tension on the y bars. Carefully tighten it back down again. If that doesn help them your rear top frame might be ever so slightly twisted. Loosen the end bolts for the rear upper frame mount and see if it settles out. Just a small amount of deviation will cause this issue.
Even with everything loose I am still 0.5mm closer in the center then at the front and rear edges of the plate. I have also tried loosening the upper rear frame, and even tweeking it the opposite direction with no change to the deviation of the plate. Any other suggestions? What have others been able to get their max deviation to?
I got everything in the shipment, except dial calibration tool. I'm not sure if that supposed to be part of the delivery. Based on to the instructions on google doc I need that tool to calibrate the bed level.