Printbed Diagnosis Pattern

thingiverse

This Pattern is for Investigating Your Printbed. It Shows: 1. It Can Help You Find Spots of Bad Adhesion (in the Image Above on the Right) If Your Printbed Has Spots of Bad Adhesion, You Will See the Difference While Printing. 2. It Displays the Leveling of Your Printbed After Printing, You Will See if the Leveling Is Consistent. 3. It Reveals the Bending of Your Linear Rails (compare the Right Side with the Bottom Left Corner in the Image Above) Some Inconsistencies That Appear as Problems with the Leveling Can Be Recognized as Bending of the Linear Rods. If the Height of the Pattern is Reduced in the Center, This Does Not Necessarily Mean Your Print Bed Is Bowed Upwards. In Most Cases It Will Indicate Sagging of the Linear Rods. Especially If Heavy Components Such As Steppers or Aluminum Base Plates Are Sitting on the Axis. On a Printer with Moving Y Axis, You Will Find Some Kind of Valley in X Direction with a Nice Even Plain in the Middle and Notable Ridge Near the Front and Rear Edges. This Is Caused by Bending Linear Rods of the Y Axis, Which Tilts the Y Carriage While Traveling. If the Carriages Reach the Extreme Position, the Inner Edges Are Facing Slightly Downwards. This Reduces the Problem Slightly. Especially If the Transition Between the Lowland in the Center and the Ridge at the Edges Occurs Above the Linear Bearings, You Will Face This Phenomena. Demonstration on [Youtube](https://youtu.be/bEpsEzuTXFs?t=490s) (sorry German) This Shows That Mash Bed Leveling Mostly Copes with the Bending of the Rail ... Alternatively It Is Worth to Think about Reducing Wait and Putting the Bearings More Apart. See [2-3-4-5-Owl](http://www.thingiverse.com/thing:1999279)