Eggbot

Die Quelle ist https://github.com/cprezzi/grbl-servo, der Code muss via Arduino-IDE kompiliert werden. Die verwendbare HEX-Datei 'grbl_v1.1f_Servo.hex' ist in der GRBL-Plotter Zip Datei enthalten. Dies ist eine spezielle Version mit RC-Servo support (wählbar in config.h)

• Die PWM Frequenz wurde auf 61Hz gesetzt (prescaler 1/1024).
• Der Pulsbreitenbereich ist 0.5 - 2.5ms.
• S0 deaktiviert nicht die die PWM, stattdessen wird die Min-Pulsbreite ausgegeben.
• Setze den Setupwert $30=255 um einen S-Wert Bereich von 0-255 zu erhalten.
• Sende M3S0 zum Beginn des GCodes zum Aktivieren des Servos und M5 am Ende des Codes zum Deaktivieren.

$0=10          (Sets time length per step. Minimum 3usec.)
$1=25          (Sets a short hold delay when stopping to let dynamics settle before disabling steppers. Value 255 keeps motors enabled with no delay.)
$2=0           (Inverts the step signal. Set axis bit to invert (00000ZYX).)
$3=0           (Inverts the direction signal. Set axis bit to invert (00000ZYX).)
$4=0           (Inverts the stepper driver enable pin signal.)
$5=0           (Inverts the all of the limit input pins.)
$6=0           (Inverts the probe input pin signal.)
$10=1          (Alters data included in status reports.)
$11=0.010      (Sets how fast Grbl travels through consecutive motions. Lower value slows it down.)
$12=0.002      (Sets the G2 and G3 arc tracing accuracy based on radial error. Beware: A very small value may effect performance.)
$13=0          (Enables inch units when returning any position and rate value that is not a settings value.)
$20=0          (Enables soft limits checks within machine travel and sets alarm when exceeded. Requires homing.)
$21=0          (Enables hard limits. Immediately halts motion and throws an alarm when switch is triggered.)
$22=0          (Enables homing cycle. Requires limit switches on all axes.)
$23=0          (Homing searches for a switch in the positive direction. Set axis bit (00000ZYX) to search in negative direction.)
$24=25.000     (Feed rate to slowly engage limit switch to determine its location accurately.)
$25=500.000    (Seek rate to quickly find the limit switch before the slower locating phase.)
$26=250        (Sets a short delay between phases of homing cycle to let a switch debounce.)
$27=1.000      (Retract distance after triggering switch to disengage it. Homing will fail if switch isn't cleared.)
$30=1000       (Maximum spindle speed. Sets PWM to 100% duty cycle.)
$31=0          (Minimum spindle speed. Sets PWM to 0.4% or lowest duty cycle.)
$32=0          (Enables laser mode. Consecutive G1/2/3 commands will not halt when spindle speed is changed.)
$100=1.111     (X-axis travel resolution in steps per millimeter.)
$101=55.556    (Y-axis travel resolution in steps per millimeter.)
$102=250.000   (Z-axis travel resolution in steps per millimeter.)
$110=10000.000   (X-axis maximum rate. Used as G0 rapid rate.)
$111=600.000   (Y-axis maximum rate. Used as G0 rapid rate.)
$112=500.000   (Z-axis maximum rate. Used as G0 rapid rate.)
$120=500.000   (X-axis acceleration. Used for motion planning to not exceed motor torque and lose steps.)
$121=500.000   (Y-axis acceleration. Used for motion planning to not exceed motor torque and lose steps.)
$122=10.000    (Z-axis acceleration. Used for motion planning to not exceed motor torque and lose steps.)
$130=200.000   (Maximum X-axis travel distance from homing switch. Determines valid machine space for soft-limits and homing search distances.)
$131=200.000   (Maximum Y-axis travel distance from homing switch. Determines valid machine space for soft-limits and homing search distances.)
$132=200.000   (Maximum Z-axis travel distance from homing switch. Determines valid machine space for soft-limits and homing search distances.)