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Once the gears mesh well all the way around, firmly tighten all 3 motor screws.
Reinstall the extruder onto the printer.
12.5.3 Spring Preload
Service interval: Every time you change filament spools
The idler bar spring preload is critical to ensuring the extruder can generate sufficient grip on the
filament. However, too much spring pressure can cause the filament to flatten out, which can cause
feed issues. We’ve determined that the ideal spring spacing is 0.425”. To make this easy, we include a
measuring fixture in your toolkit. You can use this as shown below to check the spring spacing.
Slide the springs towards the front (inlet) side of the extruder. Fit the tip of the fixture in between the
spring grabber and the washer at the top of the spring. You want the fixture to barely fit. If it slides in
easily, or there is a gap, the springs are too loose.
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