This procedure explain how to calibrate manually the BED, the goal is to write in the EEPROM of SpiderBot the right Z level value Manual mode

You'll need a piece of paper (a standard 80 or 90gr/m sheet of paper thickness 0.10mm bended 3 times) position it on the center of the bed

 

 1.     Setup the EEPROM value Zmax length to 280mm

 

 2.     Setup the Repetier Host Printable height value to 280.00mm ( Tab Printer Shape of Printer Setting dailog box)

 

 3.     Click on -Z button with steps of 10mm until the head is at approx 20mm of the bed

 

Click on -Z button with steps of 1mm until the head is at approx 2mm of the bed

 

 4.     Click on -Z button with steps of 0.1mm until the head touch the paper. Move the paper to check when the head touch.

Note carefully the Z value displayed  when the head touch the paper

In the example above the Z value is 31.20mmThe Z distance is 280mm minus the Z value you read, in the example the Z distance is

 280.00 – 31.20 = 248.80mm

5.     Click on EEPROM Configuration

 

And replace the Z max length [mm] by the Value you have calculated

Click on OK button

The value is saved in the EEPROM