the part from this page 110 of the manual after I got a useable PPK fan holder printed (seen on page 2 of my build thread) after i adjusted the end stop on the Gamma tower and switched to using paper .07mm thick from .12mm thick
the tower homed after I hit print (after I used my heat gun to careful raise the bed temp to 80 so printing would start. which was what i had to do to do the peek fan housing to start.)
this is the print I was attempting as referenced here at page 110 the manual http://www.thingiverse.com/thing:50505\n
then it dived to a spot just between the Alpha tower and the gamma tower about 5 inches above the bed and made stuttering sounds before I turned off the printerHighcooley's Onyx Bed Leveling Aid is a great one to test your calibration. Highly recommended. If you can print it perfectly you've "arrived".
so I went to the simple circles 6mm high from page 110 http://forum.seemecnc.com/download/file.php?id=8210
and did a tower cal and a reset z hight and tried to print... this time it went to a spot about 4 or 5 inch above the bed again near the Alpha tower and started to air print
so i shut down the printer and restarted it and rebooted the macbook pro I am using to drive the mater control i redid the clear memory and reinstall from page 10 and 12 the “Repetier.ino”
and redid tower cal and set for the z hight and tried the 6mm circle again and once again it went to AirPrint in the same area near the alpha tower
after it all being shut down over night I am trying to heat the bed again and once again when 80c is commanded the max it gets to is 73 then it drops to 67 and inches back to 72 or 73 and swings between the two.... i again heated the bed with the heat gun to 80c so it could start the print
the effector homed and once again started to air print the 6mm high small circle near the alpha tower even this on the MC screen it is properly seen as centered on the build plate.
Have I some how mangled the EEPROM settings? the only thing that is going to the center and a paper thickness of the bed is the tower cal macro any thing I attempt to print if it is small like those test circles air prints near the Alpha (X) tower if it is large like the bed leveling aid it also air prints but attempts to get outside the build area with much buzzing...
the important thing is that the first print all was ok except for bed adhesion caused by the bed that cooled to 72c during the course of the print
and I a got a usable fan shroud on the 3rd try
All of this started when I attempted to print the http://www.thingiverse.com/thing:50505