sp4c38

May work for other QIDI printers as well.

The general procedure of the leveling process initiated via the screen is to move the print head to four different positions. At the first three positions the appropiate screw should be adjusted in such manner that there is only little friction between the nozzle and the leveling paper.

For the first three positions you can use the "Bed Leveling Wizard" from jneilliii available via the plugin manager in OctoPrint. In the plugin settings you will need to turn on "Use Custom Points". Then add following points:

X	Y
10	10
260	10

sp4c38

infix operator >>>=: AssignmentPrecedence
infix operator >>>: BitwiseShiftPrecedence

extension Data {
    private static let countBit: [Int: UInt8] = [
        1: 0b10000000, 2: 0b11000000, 3: 0b11100000, 4: 0b11110000,
        5: 0b11111000, 6: 0b11111100, 7: 0b11111110, 8: 0b11111111
    ]
    
    /// Performs a left shift.