Manual Pinda Check:
Ok, this is my personal method for checking the pinda height on all 9 calibration points. Before going further I must say you can possibly damage your printer by doing this. Moving your axis’s by hand spins the stepper motors. If you do it TOO FAST the stepper motor will act like a generator and create voltage and current that will feed back to the RAMBO. If you use this method, move your axis’s SLOWLY. NO SUDDEN MOVEMENTS. I’ll say it again, GO SLOWLY.
This is my personal method. With the printer POWERED OFF, I slide the bed and the y carriage till it lines up with 1 of the 9 calibration points. I then power on the printer and navigate to live z axis. I lower the Y carriage until the red pinda light goes out. Then I verify I can slide a sheet of paper under the Y carriage to make sure the nozzle isn’t touch. I then power off the unit, reposition everything to the next calibration point. I do this for all 9 calibration points. If at any point the light on the pinda is out, but the paper is being caught by the nozzle, I know the pinda is too high and needs to be lowered. I follow this method BEFORE I run XYZ calibration. I learned to do this to help prevent the nozzle from crashing into the printer bed and marring the print bed surface. Below are 4 videos showing 4 calibration points. I didn’t post all 9 videos, its kinda repetitive to see. The 4th one is really good, you can really see the pinda light going out.
Once all the points are done, its onto self test.