Calibrating the filament feed
Correct extrusion quantity is important for quality prints. If the extruder is pushing too much plastic layers will overfill resulting in bumpy and uneven surfaces. Extruding too little plastic will cause weak bonds and gaps between layers resulting in a weak structure.
- Connect Gigabot's USB cable to your computer
- Turn on Gigabot
- Open Pronterface
- Click on <Connect> button at the top of the screen
Read the current extruder calibration number in Pronterface
- Pronterface will display:
- Connecting...
- start
- Printer is now online.
- ...
- echo: M92 X118.52 Y118.52 Z4031.50 E1000.00
- ...
- Check that filament is installed in extruder
- Turn on hot-end fan
- Heat hot-end to 210C
- When hot-end is up to temperature extrude 10mm of filament at 100mm/sec until you see filament coming out of the hot-end
- Mark the filament 100mm from rear filament tube shelf
- Extrude 80mm of filament using Pronterface
- Measure actual extrusion distance
- Perform calculation:
- (Commanded distance x old calibration number) / actual extrusion distance = new calibration number
- (80 x 1000) / 83.5 = 958
In Pronterface:
- Type “M92 E958” <enter>
- Type “G92 E0” <enter>
- Repeat the steps above to verify the extruder moves exactly 80mm when commanded.
Save the new extruder calibration (M92 Exxxx)
- Type M500 to save the calibration to the permanent memory.
- Simplify3D-> FFF Settings -> Scripts -> Starting G-code (M92 E958 ; calibrate E)
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